Installation
Manual 4th Edition
NEWTON
SYSTEM 500
WATERPROOFING
MEMBRANE SYSTEM
by
JOHN NEWTON AND COMPANY LIMITED
12 Verney Road
London
SE16 3DH
Tel: 020 7237 1217
Fax: 020 7252 2769
e-mail: newtons@newtonmembranes.co.uk
web: www.newtonmembranes.co.uk
September 2001
© John Newton & Co Ltd
SECTION TITLE
1.
Introduction
2.
Preparation
3.
Wall Application Newton 500
4.
Wall Application Newton 500 Lath
5.
Floor Application Newton 500
6.
Floor Application Newton 520
7.
Vault Application
8.
Sealing Instructions
9.
Ventilation
10.
Repairs
11.
Maintenance
12.
Basic Material Guide
APPENDIX
1
Technical
Drawings Summary
SECTION
1. INTRODUCTION OF NEWTON SYSTEM 500
1.1
INTRODUCTION
John Newton
& Co established in 1848 started in the damp proofing business
in 1937 with the introduction of the original Newtonite (now Newlath
2000) and have with our unique long standing experience in this industry,
evolved our products and technical data to the present high standard
of advice we now offer.
Newton System 500 is a
range of dedicated waterproofing membranes and associated products
specifically designed for waterproofing structures below the ground.
The system works by lining
the area to be protected with Newton membrane on the internal surface.
All joints and fixings are sealed using the Newton range of tapes
and sealants. System 500 can also be used as protection above substrates
contaminated by carbon deposits, salts, fertilizers etc, and can also
offer protection in high Radon gas locations.
The installation
of Cavity Drainage Membrane systems is gaining increasing popularity
over the more conventional methods of "tanking" because
it does not seek to hold back water pressure. Water is allowed to
seep through the substrate and as soon as it reaches the "air
gap" provided by the studs of the Newton membrane, it immediately
depressurises. The membrane is not designed to do more than provide a dry inner
skin to separate the wet substrate and dry interior, with the studs
acting as stilts to allow for this natural movement of water. The
draining of the water away from the Cavity Drainage Membrane is therefore,
vitally important and if implemented correctly cannot fail.
1.2 PRODUCTS
WITHIN RANGE
Newton System 500 comprises
a range of specifically designed complementary products. The complete
range is listed below, together with a brief explanation of each product
use:
Newton 500
High Density Polyethylene
(HDPE) Cavity Drain Membrane with 8mm deep conical studs for walls,
soffits and floors. Newton 500 is the main component of System 500
and comes in brown or clear (see section on clear membranes). Rolls
are 20m long and either 2.07m or 2.4m wide including the 70mm flat
jointing flange.
Newton 520
High Density Polyethylene
(HDPE) Cavity Drain Membrane with 20mm deep conical studs for floors.
Newton 520 is used above floors where greater drainage capacity is
required. Rolls are brown or black and are 20m long and 2.07m wide
including the 70mm flat jointing flange.
Newton 500 Lath
High Density Polyethylene
(HDPE) Cavity Drain Membrane with 7mm deep conical studs for walls
and soffits. The membrane has a nylon mesh thermally welded to the
face of the membrane to act as a key for plasters and renders. Rolls
are clear at 20m long and 2.07m wide including the 70mm flat jointing
flange.
Nuseal Plugs
Polypropylene Fixing Plugs
are used to attach all System 500 membranes to walls and soffits.
They are predrilled to accept a size 12 (6mm) self-tapping screw for
the fixing of battens or other dry-lining systems. 100 plugs per bag
in either red or white.
Waterseal Rope
Butyl rope in a 10mm bead
used for forming seal around the base of the Nuseal Plug and for jointing
membrane when a flange seal is not possible. Rolls are 4.75m long
in black or white.
Waterseal Tape
Butyl Tape used for jointing
membrane along the flange. Rolls are 22.5m
x 2mm x 30mm wide in black or white.
Newton Corner Strip
Black PVC backed one-sided
tape used for connecting Newton 520 to Newton 500 and for repairs
and reveal details. Roll is 12m long x 150mm wide
Basedrain
White PVC drainage conduit
designed to drain System 500 at the wall/floor junction. Has 19mm
holes every 70mm along its length to receive water pressure at the
vulnerable junction of wall and floor. Has fittings to allow for connection
to stack pipes, gullies and sump chambers, as well as inspection and
jetting ports. Six 2m lengths per pack.
Titan Pump Systems
Pump, sump, battery back-up
system designed to remove water behind the Newton membrane sytems.
BS8102 – DRAINED PROTECTION
British Standard BS8102:
1990 Protection of structures against water from the ground.
All waterproofing of structures
below the ground, or those partially earth retaining, should be designed
to comply with BS8102. Amongst other recommendations, BS8102 states
that you should assume a head of water pressure to ¾ the depth of
the basement, or for basements over 4m in depth the expected head
of water is 1m below ground level. All waterproofing systems should
be designed to deal with these pressures.
BS8102 defines Newton System
500 as Type C Drained Protection, and goes on to say that a Drained
Type C system is the least likely to fail of all forms of waterproofing.
NOTE: Newton System
is a drained cavity system. To comply with BS8102 adequate drainage
must be included within the design to remove water from behind the
system. Newton System 500 will not hold back water pressure.
1.4
FINISHING
A wide
range of finishes can be employed to walls and floors. These provide protection for the membrane, and create
a decorative finish.
1.5
TYPICAL
FLOOR FINISHES – See technical drawings (JN100)
1. Sand
and cement screeds - minimum depth 50mm.
2. Fast
drying screeds with lightweight reinforcement.
3. Wood-based
sheets (flooring grade with t & g joints).
4. Timber
boarding on floor beams.
5. Sports
floor.
All the
above can be laid with insulation where specified.
1.6
TYPICAL WALL FINISHES
1.
Dry lining with battens (with or without
insulation) using Newton 500.
Note:
Additional insulation may lead to interstitial condensation
2. Dry
lining with dabs using Newton 500 Lath.
3. Plastering
direct using Newton 500 Lath.
4. Independent
timber frame (50mm x 50mm timbers) using Newton 500.
5. Independent
metal frame system such as Gypliner or Lafarge. Available from
John Newton & Co. Ltd.
SECTION
2. PREPERATION
2.1
PREPARATION
Newton
System 500 can be installed over a wide range of substrates in varying
situations - walls, floors, ceilings, soffits, etc. However, before
the
System is installed, the area must be assessed to determine what preparation
is required.
a) All
timber fixtures and other organic material must be removed to, prevent
risk of fungal or bacterial growth behind the System, e.g. skirting
boards, timber plates, old wallpaper etc.
b) If
evidence of rot exists, this must be dealt with by a specialist contractor
prior to installation of the system.
If any
mould, etc, exists, this should be cleaned off and the area sterilised with a fungicidal wash.
c) If
the walls are uneven or areas have deteriorated, then any large depressions
should be levelled and made good to ensure a solid fixing.
d) When
assessing floor applications, consideration should be given to the
type of finish that is required.
The floor must be cleared
of oil, loose material and any sharp edges should be levelled out.
When a screed finish is to be used, any holes or severe depressions
should be filled before laying the membrane.
When a timber floor is
preferred, then more consideration should be given to achieve a flat
substrate prior to laying the membrane. This will relieve any undue
movement when fitting a final floor finish.
e) The
design of the drainage system should be agreed, implemented and tested
before covering by the membrane.
f) When
fixing the system to flat soffits you must ensure that there is a
fall to create proper drainage and prevent ponding. Any sagging of
the membrane should not be great enough for ponding to take place.
SECTION
3. WALL APPLICATION NEWTON 500
3.1 TOOLS
Minimum Required
Good quality 110V SDS hammer
drill.
Mallet or club hammer.
Stanley Knife with spare
blades.
Tape measure.
Long spirit level.
11mm SDS drill bits.
Clean rags.
Stepladder.
Recommended
Trestle staging or scaffold
for working above 2.5m.
Extra lighting.
Hot Air Gun.
3.2 WALL
APPLICATION
The Newton
500 membrane is fixed with the studs against the wall to create an
air gap.
The membrane
can be fixed either vertically or horizontally. When making this decision,
you will need to take into account the size of the job, and the height
of the walls relative to the width of the membrane. Horizontal fixing
requires less cuts and jointing but the full roll is very heavy at
first (problems may also occur when the wall is not square, see paragraph
below). Vertical fixing has very much lighter strips to fix, but requires
that each of these is taped back together again. You may find that
vertical fixing is easier, but requires more Waterseal Tape for jointing.
The membrane
is fixed to the wall with the Nuseal plugs. You must apply a waterproof
gasket around the rim of the plug using the Waterseal rope. These
should be made up in advance of fixing.
Stretch
the rope slightly as you circle around the base of the plug 1.5 times.
Do not use excess rope – when hammered home only a small amount of
rope should be seen around the bottom of the plug.
Place
the Newton 500 in position as level as you can judge by eye. Using
an 11mm drill bit, drill through the centre of a stud near the top
and edge to a depth greater than the fixing. The fixing is then hammered
into the pre-drilled hole until the plug sits flush in the stud. The
rope gasket re-seals the hole. Level the membrane using the spirit
level and fix another plug about 1.5m along at the top of the sheet.
The membrane will now be hanging level to the wall.
If you
are fixing horizontally, continue fixing every 1.5m until you have
reached the end of the roll or you have covered all of the wall(s)
to be treated. It is very important to regularly check the level.
If the Newton 500 is not level, you may well find that the membrane
is kinked and looks unsightly, it will also dive down around corners.
If you
are fixing vertically, hang each subsequent sheet by the two fixings
as described above. The subsequent sheet should overlap by at least
the width of the flange of the new sheet. You may find it easier to
interlock the first stud of the new sheet to the last stud of the
last sheet as this helps to keep the new sheet level. The vertical
joints have to be sealed with Waterseal tape. It is easier to apply
the tape to the inner surface of the flange of the next sheet. Clean
the flange an the face of the last sheet with a clean rag. When you
have fixed the new sheet level with the correct overlap, pull off
the backing paper from the tape and peel down whilst applying pressure
to the flange. Once all the backing paper has been removed, apply
more pressure with the palm of your hand to further seal the whole
of the joint. A Hot Air Gun can be used to help sealing in very cold
conditions.
3.3
FIXING CENTRES TD(JN101)
Once the
Newton 500 is hanging off the top fixings the rest of the fixing plugs
need to be fixed.
The spacing
of these fixings is dependant on the type of wall finish to be used:
Timber battens - 400mm
centers vertically and 600mm horizontally. Barrel Vaults require tighter
centers.
Fixed metal track (Gypliner)
- 600mm centers vertically and 800mm horizontally.
Brick
or block walls restrained to wall using ties should have the fixings
at centres to provide the correct number of restraints at the correct
centres.
Free standing
timber and metal frames and free standing block walls do not require
specific fixing centres. In these cases use sufficient fixings to
ensure the membrane is neat and tidy and reasonably tight to the wall,
especially around corners and reveals.
When fixing
the system to flat soffits you must ensure that enough fixings are
used to keep the Newton 500 tight to the soffits with no sagging.
All fixings
should be in line both horizontally and vertically.
3.4
BATTENS
Battens
should be pre-treated and of a minimum dimension of 25mm x 38mm although
you may find that 25mm x 50mm offers better fixing at the edge of
the plasterboard.
The battens
can be fixed into the fixing plugs without piercing the membrane,
by using 6mm (size 12) self-tapping screws. The plug will take 32mm
of screw, so be sure to purchase the correct length for the thickness
of batten.
Over-tightening
of over length screws could break or loosen the plug. Be very careful
not to puncture the Newton 500 when drilling and fixing the battens.
Battens should be fixed so that all plasterboard edges are supported.
Use a timber treatment such as ‘End Cut’ to protect cut battens.
Once the
battens are fitted into position, plasterboard can be fixed to them
using clout nails or preferably plasterboard screws. Care should be
taken not to exceed the depth of the battens with the screws, and
thereby puncture the
membrane.
3.5
ALTERNATIVE FIXINGS
Other
finishes may be employed depending on the requirements of the specifier.
a) FREE
STANDING FRAME
This method
can be employed if the wall is undulating, as with some stone structures
or where space loss is a secondary consideration. The frame would
be fixed top and bottom, and would reduce the number of fixings required
into the membrane.
b) PROPRIETARY
FIXING SYSTEMS
Fixing systems such as
Gypliner or Lafarge can be used with Newton 500 It is also possible
to use metal profile systems when constructing new internal walls.
These can be fixed without bridging the Newton 500.
c) INTERNAL
SKINS
If preferred
the system can provide a water and vapour
proof barrier, and then be lined with a block or brick inner skin.
SECTION
4. WALL APPLICATION Newton 500 Lath
4.1 FIXING
TO WALLS
Newton 500 Lath is fixed
to the walls in the same way as Newton 500 using the Nuseal plug and
the Waterseal rope. As the roll is heavier, and it is only available
in 2.07m wide rolls, most fixing of Newton 500 Lath will be vertical.
4.2 FIXING
CENTRES
Fix in a square at 350mm
centres, and then fix a plug in the centre of four fixings so it looks
like a 5 on a dice. All fixings will then be a maximum of 250mm from
each other. On very flat walls, the horizontal and vertical centres
can be moved out to 400mm so when the centre plug is fixed, the centres
are not more than 300mm.
4.3 FINISHES
Newton 500 Lath can be
plastered or rendered, or can be plasterboarded using a dab fix.
4.3.1
PLASTERS
The plasters
that can be applied to Newton 500 Lath are Thistle Hardwall (a minimum
of 12 hours drying time must be included within any quotation), Tilcon
Whitewall, Carlite Bonding or Universal Onecoat, which when applied
to this material should be in two coats. These plasters can accept
a Thistle Finish coat - a 3mm skim coat to finish.
NB
Manufacturers recommended drying times may vary according to atmospheric
conditions.
4.3.2
CEMENT BASED RENDERS
For internal
cement renders the mix to be six parts clean sharp sand/one part lime
or plasterciser/one part cement. A two-coat application is recommended
allowing 7-10 day between coats. Drying time is important because
shrinkage cracks may appear.
Note:
All plasters and renders etc must be to a minimum total depth of 15mm.
The undercoat should be applied with firm pressure to an approximate
thickness of 5mm and be well scratched by means of a wire scratcher.
When the scratch coat has set, the floating coat should be applied
to a depth of 7mm and lightly scratched to provide a firm key for
the final coat, which should be to a minimum thickness of 3mm.
All plasters
and renders should be applied strictly in accordance with the manufacturer's
instructions, and good plastering/rendering practice as described
in BS5492 and BS5262 Code of Practice.
Do not
apply decoration until plaster is thoroughly dry.
Note:
If plasters other than those specified above are used they will not
conform to the John Newton and Company specification and will therefore
invalidate any guarantee on the material. If any special renders or
plasters are to be considered, technical advice must be sought from
the Company's technical department in London.
4.3.3 DRY LINING
Newton
500 Lath can be effectively used in conjunction with dry lining by
dab fixing the plasterboard using a proprietary dabbing compound.
SECTION 5. FLOOR APPLICATION NEWTON 500
5.1
PREPARATION
Please
refer to our section on preparation and attend to any preparatory
work prior to Installation. Always clean both edges of the membrane
before making a seal.
5.2
DRAINAGE REQUIREMENT TD(JN107/JN116)
If Newton
500 is to be used in an earth-retaining situation, the membrane must
be drained. To comply with BS8102, you must assume that the structure
will be subjected to water ingress at some time. Newton 500 can also
be used to the floor in above ground situations to provide isolation
from damp floors either as the primary DPM or above green concrete
to accelerate the contract program. The concrete will continue to
cure below the dry membrane surface allowing for floor finishes to
be laid above the membrane much quicker than normal.
5.3
METHODS OF DRAINAGE FOR NEWTON 500 TO THE FLOOR
The drainage
must effectively remove all water from below the membrane and take
to a point of discharge such as a sump chamber or a form of natural
drainage. Standing water can block the membrane with silt or lime
scale so it is important for water to flow uninterrupted to the drainage
point.
5.3.1
CHANNELS CUT IN THE FLOOR
Channels
can be cut across the floor in a herringbone fashion terminating at
the sump chamber or other point of drainage.
The channels
should be to fall, and be at least 50mm wide x 50mm deep. The channels
can be made good with a lean mix and coved with a milk bottle or other
tool. Test the channels before laying the membrane.
5.3.2
BASEDRAIN TD(JN115)
Basedrain
sits in at the wall/floor junction and collects water from behind
the wall membrane and receives water under pressure at the wall /
floor junction. Basedrain is a designed method of removing water as
it can interface with sump chambers, stack pipes, gullies, waste pipes
etc. It can also be cleaned by inserting jetting eyes into the system.
5.4
INSTALLATION OF NEWTON 500 TO THE FLOOR– EARTH RETAINING
Starting
at one side of the room, unroll the Newton 500 with the studs down
and the flanged edge against the wall. Turn the membrane up the wall
by a minimum of five rows of studs. Where the membrane meets corners,
see our section on corners. Whenever the membrane meets a wall you
must allow an upturn as above.
The next
membrane width is rolled out so that the flanged edge overlaps onto
the studded edge of the last width. Clean both edges. Waterseal Tape
is then applied to the studded edge of membrane over the second row
of studs with the backing paper still intact. Check the two widths
for alignment, with the flange covering the backing paper. Starting
from the middle of the joint, remove the backing paper and press down
on the joint sealing the two sections together. This process is repeated
until all areas are covered.
When a
stud to stud joint occurs, this should be overlapped and sealed with
sealing rope as per our joint instructions. This should then be oversealed
using Newton Corner Strip
If there are any services
up through the floor, the membrane can be cut and trimmed around them,
and the gap filled and sealed using the Newton range of adhesives.
If necessary, a patch of membrane or plain DPC (PVC) is laid over
and sealed to the service with Waterseal Rope, and around its perimeter
with Waterseal Tape.
The specified
floor finish can now be laid directly over the Newton System 500,
which must not be punctured by any fixings through the floor. When
a timber floor finish is preferred you must allow an expansion gap
around the wall edge. Speak to the supplier of the floor finish to
confirm the correct size of this expansion gap.
5.5
INSTALLATION OF NEWTON 500 TO THE FLOOR – NON EARTH RETAINING
If a ventilated
floor is required, then the excess membrane above the final floor
level can be cut off flush. The skirting board, when fixed, will cover
the gap around the edge. The skirting boards can then be vented.
5.6
FAST TRACK APPLICATION OF FLOOR FINISHES
Following
the installation of new concrete slabs and screeds, it is normal to
expect lengthy drying periods before floor finishes can be applied.
Newton 500 can be laid onto green concrete as soon as it's 'walkable',
allowing instant application of floor coverings without reference
to RH levels. The construction moisture is controlled in the air gap.
SECTION
6. NEWTON 520 TD(JN112)
Where
increased drainage capacity is required, or where known potential
problems such as scaling or silting are expected, the deeper 20mm
stud Newton 520 should be used.
6.1
INSTALLATION
Because
the stud depth is greater than the thickness of Waterseal Rope, Newton
520 cannot be upturned to the wall membrane as can Newton 500. Joining
of the Newton 520 to the Newton 500 requires Newton Corner Strip.
Roll out
the Newton 520 as normal, but abut the edge of the membrane to the
wall membrane instead of overlapping up the face of the wall membrane.
When all of the Newton 520 has been cut and laid, form a joint with
the Cornerstrip.
The Cornerstrip
is easier to use if the bottom half of the backing paper is removed
first. Apply the Cornerstrip to the Newton 520, and then remove the
backing paper to the upper half and stick neatly to the wall membrane
(see installation diagram JN112).
SECTION 7. VAULTS
Newton 500 or Newton 500
Lath can be used for Vaults or Vaulted soffits.
7.1
INSTALLATION TO VAULTS OF NEWTON 500 AND Newton 500 Lath
TD(JN115)
A ceiling
which is to be covered, as in a vaulted cellar construction, should
be fixed and lapped in such a way so that water does not pond behind
the system.
The laps and joints should
also be detailed correctly to allow correct drainage, and prevent
water from sitting on joints. Where flat soffits are being considered
it is imperative that they should have a fall in line with drainage
requirements. Again, sagging of the membrane should be avoided to
prevent ponding. If in doubt about soffits see Technical Drawing
or ask our advice.
7.2 DRAINAGE
TD(JN116)
See section
5.2 and 5.3
7.3 APPLICATION
Where
System 500 is to be installed in vaulted cellars our experience shows
that the best method of application is as follows:
Measure
the depth of the vault from front to back wall and allow for a down
turn at each end of 200mm unroll the sheet and cut to size.
Estimate the approximate
centre of the arched ceiling and mark it. Measure down the arch 1.2
meters from there and again mark it. Strike a horizontal line along
the wall from back to front. This will give you a guide line for your
sheet edge as you fix it along the length of the ceiling, thereby
keeping your sheet sections symmetrical. You may wish to hammer in
masonry nails to the guide line to give a physical edge to the guide
line.
Offer
up your first section of membrane to the ceiling allowing a downturn
on the back wall of 200mm. Using your guide line to keep the sheet
square and using an 11 mm drill bit, drill and fix the sheet along
the apex of the arch following the same line of studs you will use
the Nu-seal plug with rope for this application.
The fixings
should be fixed through the centre of the studs at approximately 600mm
centres.
It should
be remembered that the plugs provide the fixing points for your battens;
therefore they should be kept in line.
Your next section of membrane
is again cut to size allowing a 200mm lap at each end. Before offering
up the next sheet a Waterseal Tape joint should be applied to the
edges of the first sheet either on the flanged edge or between the
last two rows of studs on the none-flanged edge. With the protective
paper left on the tape you can now offer up the next sheet ensuring
that you use the flanged edge to overlap onto the
sealing tape.
Once you
have the second sheet positioned correctly over the sealing tape,
remove the protective paper working out from the middle and effect
a seal.
You can
now carry on fixing the sheet as previously described. This process
is repeated until you have covered the sidewalls and arched detail
down to floor level, maintaining a 200mm lap onto the end walls.
7.4
VAULTS – END WALLS TD (JN107/JN109/JN115)
At the
end walls of vaulted construction, the Newton Membrane along the arch
and side walls must be turned down and round onto the end walls by
a minimum of 200mm. Around the arch the turndown is cut to fit the
curve and sit neatly against the wall. Do not make the cuts all the
way up to the ceiling and make as few cuts as possible. Measuring
the highest point of the arch, the membrane is cut to size and fixed
to the end walls in front of the ceiling membrane.
The membrane is then trimmed to fit neatly into the curve of the ceiling.
The end
wall membrane is then pulled back at the sides and around the arch
to expose the studs on the reverse side using Waterseal Rope, a joint
is made by the same method at the stud/stud joint details, with the
exception that around the arch the rope should follow the contour
of the ceiling curve.
7.5
FLOORS
Where
a floor application is required in this situation, which is common
practice in this type of specification, it is laid as per our standard
floor installation and sealed to the walls using rope or tape according
to the type of joint. However, if the floor is not being done - you
should provide for the correct drainage facility.
Advice
from our Technical Department is available in this situation
7.6
DOOR OPENINGS
When you
fit the Newton 500 to the end wall with the door opening, please bear
in mind that you will have to fit a section of membrane around the
door head and lapped down the sides by approximately 100mm. You can
then wrap the wall membrane around the sides, maintaining the correct
drainage detail and forming an overlap.
This application
detail will produce a small gap on the angle of the door opening.
This should be sealed using Newton Corner Strip.
7.7
OVERHEAD INTRUSIONS TD(JN103)
Where service pipes, electrical
wiring or other intrusions occur overhead or around the arch, these
should be re-sited to a vertical surface where they can be better
sealed and re-situated on the dry side of the system. Most services
can be concealed between the battens.
SECTION 8. SEALING INSTRUCTIONS
8.1
GENERAL
It should
be noted that all membrane and sealing surfaces must be clean, dry
and dust free before applying sealing materials. When making a joint
between two sections of membrane, the water seal tape or rope should
be pressed firmly against the Newton membrane for good adhesion.
There
are two standard types of sealed joints that can be made: The flanged
joint or stud/stud joint.
8.2
THE FLANGED JOINT TD(JN102)
The flanged
joint should be used whenever the flat edge of System 500 can be facilitated.
Consecutive membrane widths are fixed to the walls or laid on the
floor so that the flange lays over the top of the studded edge of
the previous sheet. The flange must cover a minimum of two rows of
studs. Using the Newton Waterseal Tape, unroll this onto the studded
edge sheet, beneath the flange. The tape should be positioned between
the last two rows of studs on the flat section, and pressed firmly
into place.
The backing
paper should still be on the tape at this point.
Check
that the flanged edge of the upper membrane is in position and covering
two rows of studs before removing the backing paper from the tape.
Once the
flanged edge is in position, remove the tape's backing paper, starting
from the middle of the joint. Press the two membrane layers together
firmly as you remove the protective backing paper.
8.3
STUD/STUD JOINT TD(JN102)
Where
a flanged joint is not possible, overlap the membranes to be joined
by a minimum of three rows of studs. The joint is then formed by using
the Waterseal Rope adhesive.
This is
done by lifting back the edge of the upper membrane to reveal the
underside of the studs
The Waterseal
rope is then positioned between the last two rows of studs, and pressed
firmly into place.
Checking
that the upper membrane is still positioned correctly, remove the
rope's backing paper, starting from the middle of the joint. Press
the two membrane layers together firmly as you remove the protective
backing paper.
Where
a stud/ stud joint is unavoidable on a floor application (not the
floor/wall upturn), this should be over-sealed using the Newton Corner
Strip.
8.3.1
NOTE: When making a stud/stud joint always
position the rope between the studs on the reverse side of the membrane,
and not on the surface you are sealing to. This will ensure an even
seal.
SEALING AT: -
8.4
CORNERS
When System
500 is being laid as a floor only application, or as part of a sealed
application, the membrane is turned up the walls.
8.5
INTERNAL CORNERS TD(JN112)
The membrane
is worked into the corner and the membrane upturn is cut, allowing
it to overlap and sit neatly into the corner.
This is
then sealed using corner strip. The Corner Strip is folded and cut
to form an angled section to fit neatly into the corner. Once formed,
care should be taken to remove the backing paper and position neatly
into the angle of the corner.
8.6
EXTERNAL CORNERS TD(JN113)
When fitting
the membrane around an external corner the sheet is cut at 45° from
the lower point of the corner.
This allows
the membrane to continue along the floor and maintain an upturn. This
will also create a 'V' shaped gap at the corner. This gap requires
sealing using Newton Corner Strip. This is a self-adhesive product
that is cut and folded to wrap around the corner, allowing a 50mm
lap onto the floor. Care should be taken to ensure that the lowest
point of the corner is sealed correctly. This is done by overlaying
an extra piece of Corner Strip.
When a
floor-only application is being installed, an extra lapping piece
of membrane will be required to bridge the gap before sealing.
8.7
SERVICE THROUGH FLOORS AND WALLS TD(JN103)
Occasionally,
service pipes and other intrusions will interrupt a continuous application
of the membrane. In this instance the membrane should be trimmed neatly
around the service and sealed using the Waterseal Rope and oversealed
with Corner Strip.
If necessary,
a patch of membrane or plain DPC (plastic type) can be overlaid and
sealed to the service around its perimeter using the Newton range
of sealing products.
8.8
OVERLAP JOINTS TD(JN102)
On walls,
System 500 can be fixed either vertically or horizontally. System
500 is overlapped either by the flanged edge or by a minimum of three
rows of studs.
8.9
GENERAL
In all
cases ensure that membrane overlaps are made which provide continuous
drainage behind the System. Avoid making laps that would allow water
to drain onto the joints.
SECTION 9. VENTILATION
9.1
VENTILLATION
When you
are dealing with confined basement areas with poor or restricted ventilation,
then you may consider the risk of condensation and the introduction
of mechanical extraction systems with humidistat sensors. This is
imperative if a ‘Grade 4’ totally dry environment is required.
This advice
applies whether or not you are using our system or any other type
of system, although it should be said that our membrane range can
reduce the risk of condensation when specified correctly.
SECTION 10. REPAIRS
10.1
REPAIRS TO STUDS {Vertical}
When the
wrong stud is drilled in error this can easily be repaired by cleaning
out the stud with a clean cloth and plugging it with sealing rope.
This can then be covered with a small patch of Corner Strip or plugged
with Waterseal Rope or Waterseal Tape.
The same
repair can be used where a successful fixing has not been achieved
due to drilling into unsound joints or structure. Simply make the
repair and re-drill another stud on the same line.
10.2
REPAIRS TO MEMBRANE – SYSTEM 500 (Vertical Walls)
10.2.1
If the membrane is accidentally cut or pierced this can be repaired
by cleaning the surfaces with a clean cloth and using the sealing
tape, seal along the length of the cut bridging both edges and also
extending beyond the two furthest points of the cut by 25mm.
10.2.2
If the membrane is ripped causing a ragged cut, this will need to
be sealed using Newton Corner Strip, using the same method as above.
10.2.3
If the membrane is damaged and a hole is created, this can be bridged
by using the Corner Strip providing the hole can be bridged in one
piece with at least a 25mm margin around the hole.
Larger holes can be bridged
by cutting a piece of System 500 to cover the hole and allowing a
margin beyond the hole size. This can then be sealed in two ways:
a) If
the repair membrane sits neatly into the studs the edges can be sealed
using Waterseal Tape over the repair section and lapping onto the
main section. Seal around perimeter.
b) Alternatively,
if the studs don't interlock, a ridge will be formed and you will
need to use Corner Strip to bridge around the perimeter of the repair
patch onto the main section.
10.3
REPAIRS TO FLOORS/VAULTED CEILINGS
Where
damage to a floor or vaulted ceiling occurs this can be repaired using
the same methods as above, but you must always use the Corner Strip
to bridge or seal the damage.
It is
imperative that all surfaces to be sealed are clean and dry before
making the repair. In some instances it is acceptable to warm the
membrane, and the Corner Strip, prior to making the seal to alleviate
any surface moisture This can easily be done with a hot air gun.
10.4
GENERAL
All the
above repair procedures require access to the System to achieve a
proper repair. This will involve removing any finishes to gain access,
although it should be said that once the finishes are in place damage
should not occur. In the case of screeded floors, the screed must
be removed to access the damage. This must be done with extreme caution
to prevent further damage to the membrane.
Note:
Where multiple damage has occurred on a section of membrane it may
be advisable to cut out and replace a large section of membrane.
SECTION 11. MAINTENANCE
11.0
MAINTENANCE
Generally
speaking, Newton Membrane Systems are maintenance free. However, there
are a number of points you should be aware of, and indeed your client
should also be made aware of in the content of your survey report/contract
documents.
11.1
CHECKS PRIOR TO FINISHES
During
the installation of the System, any repairs that are required should
be carried out as they occur This will save time later, and reduce
the risk of overlooking a potential problem.
Once the
System is installed, but before the finishes are applied, the membrane
should be checked for damaged areas and repaired as necessary. Also
joints and seals should be checked to make sure they are adequate.
Any repairs found necessary should be carried out in accordance with
Section 10 of this manual.
11.2
MAINTENANCE TO MECHANICAL PUMPS TD(JN104)
The maintenance
inspection should cover the following items plus any additional requirements
as required by the specific pump manufacturer.
1. Cleaning
and de-scaling as required.
2. Checking
for and ensuring free movement of the impeller.
3. Checking
seals for leakage and renewing as required.
4. An
independent test ensuring free movement.
5. Inspect
discharge pipes for damage and leaks.
6. Remove
any debris from base of sump that may interfere with pumping.
7. Changing
the oil as specified by pump supplier.
8. Check
electrical connections and fuses.
All the
above should be carried out per annum as a minimum requirement or
in accordance with the pump manufacturers recommendations.
The above
should be carried out by a competent person or as part of a maintenance
contract.
NOTE:
a) The
pumps must never be activated whilst dry, as this will damage the
effectiveness and life span of the unit.
b) Mechanical
sump pumps are powered by electricity. It is important to maintain
a constant power source to achieve maximum drainage capacity. Battery
Back- up pumps are available for continuing the discharge of the sump
during failure to the power supply or to the primary pump.
11.3
ALTERATIONS
Newton
System 500 is a flexible high density Polyethylene membrane. Our systems,
like other waterproofing systems should not be pierced in any way.
If works
are proposed in the basement area that is likely to penetrate or disturb
the membrane, advice must be sought from the specialist installing
company or John Newton & Co Ltd, prior to such work being carried
out.
Even,
if minor modifications are proposed to the waterproofed areas, such
as shelves, cupboards etc. The specialists should be contacted so
that they can advise on the correct fixing method.
