Roofing

Butynol Sealant has been specially designed and formulated for sealing Butynol flashings into chases as found in Building and Construction. Butynol Sealant gives excellent adhesion and sealant to both Butynol Membranes and building substrates. Available in black or grey.

 

 

SPECIFICATION

A synthetic rubber with properties which resist ageing

from heat sunlight and ozone. It has excellent gas

impermeability and toughness and remains flexible at

low temperatures.

Butynol is manufactured by combining the petroleum

gases isobutylene and isoprene at the extremely low

temperature of – 100°C. (Rubber Technology–Morton)

Butynol is marketed by ARDEX as a warranted roofing and

tanking product and fixed by their trained and experienced

Approved Applicators.

BUTYNOL MATERIAL SPECIFICATIONS

Our requirements for long term warranty necessitate that

Butynol meets these typical technical requirements:

Specific Gravity to ASTM D297 1.20±0.05

Hardness IRHD to ASTM D1415 65±5

Tensile Strength to ASTM D412 8.3 MPa min

Modulus at 300% elongation to ASTM D412 4.15 MPa min

Elongation at break to ASTM D412 300% min

Heat Ageing (7 days at 115° C)

Tensile Retention to ASTM D412 70% min

Elongation Retention to ASTM D412 70% min

Tear Strength to ASTM D624 26kN/m

Ozone Resistance to ASTM D1149 No visible cracks

(7 days at 40°C in 50pphm ozone)

Water Permeability to ASTM E96-92

(mg/m2.h at 35mm Hg) 2.9 at 32°C

(mg/m2.h at 55.32mm Hg) 15.3 at 40°C

Sample ID

Vapour Flow

Resistance

(MNs/g)

Mean

Vapour

Flow

Rate

Mean

D2789 A

D2789 B

D2789 C

7840

5880

23521

12414

0.014

0.019

0.005

0.013

Note: Interesting comparable figures for water permeability

are – Polythene 156 Asphalt 1830 P.V.C. 4900.

K Values on 1mm Butynol sheeting

K Value (Thermal Conductivity) 7.4 x 103

Cal/cm/sec/deg C.

Conductivity Data on 1mm Butynol sheeting

Resistance/m2 ???? /m2 = 0.6816 on 9.3 volts.

Seam Tape performance

Tests on the seam tape bonding method by an

independent testing laboratory have shown average

values equivalent to 90% of unwelded material.

It is considered impossible for the test methods used

to be duplicated in normal service ie. 400% elongation.

BUTYNOL PROTECTS

Against water moisture vapour gases sun ozone frost

acids chemicals and bacteria.

 

 

 

BUTYNOL RESISTS

Tearing flex cracking bubbling and abrasion. It is

extremely strong has a long life and is versatile.

BUTYNOL IS PACKAGED

In rolls of nominal 1.4m width and 17.86m long. Each roll

is packed in polythene wrapper trademarked BUTYNOL

with thickness identified. Coverage 25m2 except 2.25mm

gauge which is 12m2.

Gauges available are:

1.0mm black. Weight: nominal 30kg

1.5mm black. Weight: nominal 45kg

2.25mm black. Weight: nominal 32kg

1.2mm dove grey. Weight: nominal 30kg

1.5mm all colours. Weight: nominal 47kg

ADHESIVES AND SOLVENTS

Specially formulated for all Butynol applications. Supplied

in 20L steel pails (approx. 20kg). 4 and 1 litre cans.

SEAM TAPE

Uncured Butyl Cold Gum tape supplied by ARDEX. Supplied

in 50mm x 30.5m rolls (6 to a carton). Used for general lap

bonding and laps likely to be subject to periodic ponding.

BUTYNOL SEALANT

Available in tubes for caulking guns.

DETAIL TAPE

A Malleable exterior tape for flashing exterior corners etc.

150mm x 30.5m rolls.

FLASHING TAPE

A malleable tape for moulding in gussets pipe flashings

and awkward situations. Supplied in widths of 50-100mm

x 5m. Flashing tape must not be left exposed. A Cover

strip of Butynol must be applied over flashing tape to finish.

 

 

 

BUTYNOL GAUGES

Standard 1.0mm – For roofs and gutters.

1.2mm – For roofs.

1.5mm – For roofs and walk out decks.

2.25mm – Heavy Duty

Factory welded panels in all gauges can be custom made.

SUBSTRATE VENTILATION

Substrate ventilation should be used to release moisture

trapped under the Butynol. Substrate ventilators are used

 

in conjunction with vent tapes. Tapes should be laid in

a grid pattern spaced at 600mm venting to the roof

perimeter. One way substrate ventilators prevent moisture

vapour build up and one should be installed every 90

square metres. Not designed to ventilate roof cavities.

(Refer Diagram page 2/16)

PLYWOOD TREATMENT

In normal use plywood substrate does not require

treatment when used under Butynol. NZS 3602:1995

Table 2B Amendment No. 1 August 1996.

DURABILITY

Butynol when fixed according to ARDEX instruction will

meet the NZBC requirements of B2.3.1(b) 15 years.

Case history of the product in use show applications

in excess of 30 years without any additional protection.

EXTERNAL MOISTURE

New Zealand Building Code Acceptable Solution.

E2/AS1 requirements recommend membrane clad roofs

have a minimum pitch of 1.5°.

DAMP AND WEATHERPROOFING

The Building Code of Australia Deemed-to-Satisfy

Provisions F1.9 and F1.10 are met by Butynol as an

acceptable dampproof course. Butynol when used as

described in ABSAC Technical Opinion 188 August 1994

complies with the Building Code of Australia Deemed-to-

Satisfy Provision F1.7(b) and Acceptable Construction

Manual Part 3.8.1.0 or AS 3740 for “Water Proofing of

Wet Areas in Buildings”.

FIRE RATING

The Butynol roofing system must be considered

combustible but may be used on buildings for all purpose

groups subject to the requirements of NZBC Acceptable

Solution C/AS1 Part 7 Paragraph 7.11.1

When used for roofs in Purpose Groups SC and SD a noncombustible

substrate or timber 18mm thick is

acceptable. Refer 7.11.1.

Building Code of Australia allows use in all building types

under Specification C1.10 Clause 7(e) except in bush fire

prone areas.

PRODUCT WARRANTY

Butynol when laid by a ARDEX Approved Applicator is only

covered for up to 20 years if a written material warranty

has been requested and provided.

WORKMANSHIP

A warranty for workmanship shall be provided by the

Approved ARDEX Applicator. The period of the

workmanship warranty shall be determined by the

Approved Applicator.

 

 

 

ADHESIVES AND SOLVENTS

FOR USE WITH BUTYNOL

ARDEX WA 98 – The standard contact brushing spray

grade and rolling adhesive for fixing to the substrate and

for laps not subject to periodic ponding.

ARDEX WPM 299 Seam Primer – A Water resistant

primer adhesive used with seam tape for general lap

bonding.

Note: Temperature and Humidity

The evaporation of any solvent adhesive system causes

a drop in temperature at the interface. At times of high

humidity this can result in a micro molecular water layer

at the interface which will result in a failure to bond

falsely attributed to adhesive failure. Fixing should not

proceed under these circumstances.

NOTES

1. In cases of extreme absorbency a priming coat of full

strength ARDEX WA 98 Adhesive may assist water

shedding and absorption. However a follow up of full

strength adhesive for full bonding should not be

proceeded with under four hours thus allowing full

evaporation of solvents absorbed into the substrate.

Primers must

be time dried not touch dried.

2. As new substrate materials continually appear

on the market consult ARDEX for approval of their

use with Butynol.

3. Where periodic ponding is likely and on roofs with a

slope of 5° or less ARDEX Seam Tape and ARDEX

WPM 299 Seam Primer must be used on all joints.

4. Laps can be formed on roofs with a pitch greater than

5° with normal brush grade substrate ARDEX WA 98

Adhesive. Laps must be solvent wiped with ARDEX

WA 985 solvent prior to applying adhesive. They

must however at all times drain dry and have no

periodic ponding.

5. Do not use in temperatures less than 6°C.

CAUTION

All Adhesives and Solvents are HIGHLY FLAMMABLE.

 

DANGER

Gives off highly flammable vapour. Keep well away from

heat sparks and open flame. Keep closed when not in use.

 

DIRECTIONS

Once the Butynol Membrane has been fixed into place

apply an even bead of Butynol Sealant into the chase

which should be properly prepared by ensuring all

surfaces are clean dry and sound. Tool the sealant bead

to ensure there are no voids gaps or air pockets and that

the bead has a neat and flush finish. Cut the cartridge

nozzle to give the desired aperture and angle. For best

results the sealant should be gunned by pushing the

cartridge nozzle forward during application.

TACK FREE TIME:

Approx. 24 hours depending on temperature conditions

can be painted within 4 to 6 days.

FULL CURE TIME:

4-6 days depending on temperature conditions.

CLEAN UP:

Clean tools etc. with mineral turps.

COLOUR:

Black in 375ml tubes.

Also available for Butynol

Seal ‘n’ Flex Polyurethane

600ml sausages Colours – black and grey

Silaflex MS 300ml tubes Colour – grey

 

BUTYNOL RUBBER ROOFING SPECIFICATION

1. PRELIMINARY

Refer to the Preliminary and General Clauses of this

specification and to the General Conditions of Contract

which are equally binding on all trades. This section of

the specification shall be read in conjunction with all

other sections.

2. SCOPE

This section of the contract consists in general of the

provision and laying of all the Butynol rubber for the

roofs decks gutters and flashings on the buildings.

Refer to Clause 12 hereafter for Extent of Work.

3. WORKMANSHIP

The whole of the work shall be carried out by skilled

tradesmen using adequate and proper equipment

and methods in accordance with best trade practice

and following the specifications methods and

recommendations as laid down by the manufacturers.

4. SUB-CONTRACTORS

The work included in this section of the contract shall be

carried out by a firm of roofing experts conversant with

and specialising in the supply and fixing of this material

and shall be a firm approved by ARDEX and the architects.

5. GUARANTEE

The Butynol roofing contractor shall furnish to the main

contractor a written guarantee that the Butynol rubber

roofing guttering and flashing together with the adhesives

employed will remain watertight and free from any defects

that permit the entry of water for a period of twenty (20)

years after the installation of the product. Such guarantee

shall cover the making good of any defects that may occur

from defective materials. The roofing contractor shall obtain

from the manufacturer of Butynol rubber sheeting and the

adhesives a guarantee covering their materials and shall

deliver the guarantee to the Architect. The Butynol Installer

shall during the course of this subcontract and at completion

make a thorough inspection of the works in order to

undertake to furnish a written statement to the main

contractor to the effect that all the Butynol roofing gutters

and flashings have been inspected and passed as being

fixed strictly in accordance with ARDEX recommendations

and instructions and best trade practices.

6. MATERIALS

6.1 Butynol Rubber

(a) Shall be 1.0mm thick standard Black Butynol rubber

to all roof surfaces gutters and fascias and walk out

decks where membrane is to be overlaid with tiles.

(b) Shall be 1.5mm thick Butynol to all walk out decks.

6.2 Adhesives

Shall be as recommended by ARDEX specially formulated

for Butynol rubber and suitable for the particular

application and the relevant temperature and conditions

applicable. Generally the normal adhesive for substrate

and lap bonding shall be ARDEX WA 98 Adhesive. Primer

for lap bonding shall be ARDEX WPM 299 Seam Primer

used in conjunction with ARDEX seam tapes. When

conditions are experienced that are outside the temperature

and/or moisture ranges recommended by the manufacturers

for the above standard adhesives work will cease.

6.3 Seam Tapes

Shall be as supplied by ARDEX and shall be uncured Butyl

Cold Gum tape (Refer ARDEX seam tape). For general lap

bonding the tape shall be 50mm in width.

6.4 PVC Tape

All Plywood joints shall be taped with an approved PVC

pressure sensitive self adhesive tape of 25mm width or

ARDEX approved alternative.

7. ROOF DECKINGS

Shall be 1.5mm thick Butynol for all deck surfaces. All

decks to which Butynol is to be fixed shall be clean

smooth dry and free from dirt grit or sharp objects. All

decks concrete or sheet materials shall be primed with

50/50 ARDEX WA 98 and ARDEX WPM 290 solvent. The

Butynol roofer shall co-operate with the other trades laying

the decking to ensure that the final surface is in first class

condition for the laying of the Butynol rubber roofing.

On concrete decks arrange to prime the decks after initial

curing again to immediately cover by roofing or the

provision of temporary waterproof covers. The Butynol

roofer shall check the deck before laying any Butynol to

ensure that the surface is completely sound screw fixed

to specifications: screw heads flush sheets spaced to

provide for hydro expansitivity and if plastered concrete

that there is no drumminess.

8. LAYING OF BUTYNOL ROOFING

It is the responsibility of the Applicator to ensure that the

surface to be covered by the Butynol is in fit and proper

condition suitable in all respects for the laying of the

material. Tape all joins in substrate sheets with 25mm

wide PVC pressure sensitive tape or ARDEX approved

alternative. Apply adhesive to the substrate and the

underside of the Butynol rubber sheeting by brush spray

or an approved type roller at a spreading rate of generally

not less than 2.5 square metres per litre. Leave to tack

dry observing the minimum and maximum allowable times

set by the adhesive manufacturer before bonding the two

surfaces together. Lay sheeting by drawing back halfway

either longitudinally or transversely. Thoroughly roll or

work over the surface of the sheet to exclude all air and to

obtain a full bond. In general – all Butynol sheeting shall be

laid out on the roof to “relax” the sheeting before fixing. A

period of at least 20 minutes is usually required. Do not

finally position sheeting with a tension exceeding 2%. All

sheeting to the roofs shall be laid out as indicated on the

roof plan ie at across the slope to an even Patter. End

laps shall be avoided wherever possible but where

necessary to the Architects approval. All roofs and/or

gutters shall be “lap bonded” at all joints. Lap bonding

shall be with ARDEX Seam Tape and ARDEX Seam

Primers.

 

Bonding Laps with ARDEX Seam Tape and ARDEX

WPM 299 Seam Primer

Following laying of the Butynol the laps must be sealed.

Roofs with a pitch of less than 5° and all guttering and areas

subjected to periodic ponding require special lap bonding.

1. The top lap is positione
and the bottom sheet marked

to indicate the edge of the top sheet.

2. The top sheet is folded back.

3. The ARDEX WPM 299 Seam Primer is then applied to

the Butynol in the area marked on the bottom sheet and

50mm in from the edge on the top sheet. The ARDEX

WPM 299 Seam Primer is applied to the mating

surfaces using a synthetic scrubbing pad. Scrubbing

pads should be replaced as they become dirty. Allow

the primer to become ‘dry to the touch’.

4. Position and unroll the 50mm ARDEX Seam Tape along

the seam. The edge of the release paper should be

aligned to the mark on the bottom membrane sheet.

5. Roll the length of the seam with the release paper still

in place.

6. Remove the release paper from the ARDEX Seam Tape

by pulling at a 45° angle away from the seam. Keep the

release paper low to the roof surface as it is removed.

7. Fold into place the primed edge of the top sheet.

8. Roll the completed seam.

9. TILING OVER BUTYNOL

To direct fix tiles to Butynol ABA Optima two part adhesive

should be used. Ensure the Butynol surface is clean and dry

before applying the adhesive. All laps must have seam tape.

10. PROTECTION OF LAID BUTYNOLSHEETING

The Butynol roofing contractor shall ensure that his fixers

only work on the Butynol roofing with soft sole shoes. The

Butynol roofer shall co-ordinate with the main contractor

who shall ensure that any other trades who work over the

completed roof wear soft sole shoes.

Upon completion of each area the roofer shall get

the main contractor to inspect the area and the main

contractor will sign off that the area was free from

any defects or damage. It is then the responsibility

of the main contractor to ensure the Butynol roofing

is in no way damaged by other trades.

11. COMPLETION

On completion of this roofing carefully and thoroughly

clean off and remove all scraps and other rubbish from

finished surfaces and leave in tidy order with the whole

roof waterproof and in first class condition.

12. EXTENT OF WORK

Observe the foregoing specification and supply and lay

Butynol rubber sheeting to all roofs decks gutters and

flashings as shown and detailed on the drawings.

Failure to comply with the above specifications will result

in all warranties being null and void.

SUBSTRATE SPECIFICATION

All surfaces to which Butynol is to be fixed shall be clean

smooth dry and free from sawdust grit or sharp objects.

Plywood must be sanded on one side and free from knots.

CD Grade Construction Plywood as specified in NZS

3602:1995 Table 2B Amendment No. 1 August 1996

and in conjunction with Australian/New Zealand Standard

2269:1994. Sarking should be overlaid with Plywood

giving an ideal laying surface.

For normal conditions the Plywood substrate should be

17.5mm and fixed with 3mm gaps between all sheets

and counter sunk screw fixed to Plywood manufacturer’s

specifications. Fixing centres: edges 150mm

intermediates 200mm. Note that there may be a

requirement for closer screwing of the Plywood substrate

to suit the particular situation. Plywood is to be laid with

the face grain at right angles to the supports. Where roofs

are over damp conditions adhesive fixing should be used

with screws. Plywood must have sufficient ventilation.

Insufficient ventilation will require treatment in line with NZS

3602:1995 Table 2B Amendment No. 1 August 1996.

Refer to Plywood manufacturers for screw specification.

Staples and nails are not suitable in any circumstances.

NOTE: The use of LOSP (Light Organic Solvent

Preservative) treated Plywood or composite boards of any

type or density must not be used under Butynol in any

circumstances or conditions.

Joins in plywood sheets are to be taped using 25mm

Polyethylene tape. Plywood substrates with right

angled internal corners should have a triangular fillet

50mm x 50mm screwed to each corner. External corners

should be rounded to reduce wear on edges and allow

an improved finish. Downpipe outlet holes should be

drilled through timber boxed gutters and decks before

installation. Butynol must have a 150mm minimum

upstand on decks therefore provision must be made for

timber backing. It is important to leave doors and windows

out until Butynol has been fixed. A steel trowel finish is

required on all concrete surfaces. New concrete must be

cured a minimum of 28 days prior to Butynol installation.

If any patch or filling of substrate is required it is best

to use a fibreglass material or an ARDEX floor laying

compound to resist the heat absorbed through the

black Butynol so it will not break up causing bubbling.

Pumice surfaces are not recommended as a suitable

substrate for Butynol. Light weight concrete surfaces

require saw cut grooves for venting purposes.

On large areas of Plywood sheets may be preprimed

before being screwed to roof framing to speed the

application of the Butynol. Temperature on the substrate

surface must not drop below 6°C for adhesives to go off.

LAYING SPECIFICATION

The Sub contractor for the work called for in this trade

will be a Company or Person Accredited by ARDEX. The

Accredited Applicator (hereafter called the Applicator) shall

examine all drawings and provide for the flashing caulking

and sealing of all vents stacks and pipes penetrating the

roofing membrane. Also all flashings at walls parapets

verges gutters etc. unless otherwise instructed in the

specifications.

The surface to which Butynol is to be fixed shall be clean

smooth dry and free from sawdust grit or sharp objects.

Membrane laying shall not start until defects have

been corrected.

It is the responsibility of the Applicator to ensure that

the surface to be covered by the Butynol is in fit and

proper condition suitable in all respects for the laying

of the material.

On completion the Applicator will provide the owner

with a Workmanship Warranty and obtain from ARDEX

a Materials Warranty.

Failure to comply with the above specifications will result

in all warranties being null and void.

LAYING THE BUTYNOL

Before applying the Butynol it shall be unrolled for twenty

minutes to relieve stresses induced by manufacture and

storage. The Butynol sheet shall be set out in the exact

position in which it will be finally required and while it is

held in place it shall be folded back lengthwise to expose

half the underside. To the now exposed underside and the

area of roof also left exposed apply an even coat of

ARDEX WA 98 Adhesive. When the adhesive has become

touch dry work the sheet back into its original position

avoiding wrinkles and the inclusion of air bubbles. Repeat

the process with the other half of the sheet and when

completed roll the whole sheet with hand press rollers or

the like. When applying the next sheet it shall be lapped

over the first sheet by 50mm. All turn ups and downs shall

be neatly formed and cut to a straight line if necessary.

Butynol shall not be laid under tension. When the whole

area has been covered or as work progresses the

applicator has to seal the laps.

 

BUTYNOL LAYING METHOD

STEP 1

Accurately place sheet. Mark spacing with chalk line.

STEP 2

Fold back half sheet. Apply adhesive to both faces.

STEP 3

After flash off fold membrane into place. Roll thoroughly.

STEP 4

Treat 2nd half of Butynol similarly.

BONDING THE LAPS

Roofs with a pitch of less than 5° all coloured membranes

and all guttering and areas subjected to periodic ponding

require special lap bonding.

All coloured membranes irrespective of pitch require

special lap bonding.

1. The top lap is positioned and the bottom sheet marked

to indicate the edge of the top sheet.

2. The top sheet is folded back.

3. The ARDEX WPM 299 Seam Primer is then applied to

the Butynol in Butynol Guttering the area marked on the

bottom sheet and 50mm in from the edge on the top

sheet. The ARDEX WPM 299 Seam Primer is applied to

the mating surfaces using a synthetic scrubbing pad.

Scrubbing pads should be replaced as they become

dirty. Allow the primer to become ‘touch dry’.

4. Position and unroll the 50mm ARDEX Seam Tape along

the seam. The edge of the seam tape should be aligned

to the mark on the bottom membrane sheet. The seethrough

film makes this very simple.

5. Roll the length of the seam with backing film still

in place.

6. Remove the backing film from the ARDEX Seam Tape

by pulling at a 45° angle away from the seam. Keep the

release paper low to the roof surface as it is removed.

7. Fold into place the primed edge of the top sheet.

8. Roll the completed seam.

 

Black Butynol and roofs with minimum pitch of 5° and

sufficient fall to prevent periodic ponding may be formed

using the sheet bonding adhesive ARDEX WA 98. All laps

must be wiped with ARDEX WA 290 solvent prior to bonding.

FORMING LAPS FOR GUTTERS

Laps are most important in gutter work and should be and

formed using ARDEX seam tape and ARDEX WPM 299.

All internal boxed gutters can be easily formed to any

shape or size using Butynol over any specified substrate.

FLASHING INTO CONCRETE WALLS

EXTERNAL CORNERS

Step 1

Bond 100mm flashing or detail tape to corner as shown.

Step 2

Bond BUTYNOL to deck and up wall 150mm minimum. Cut

sheet from corner at 45° as shown.

Step 3

Cover corner point with layer of detail tape.

NOTE: Fillets must be used on all internal corners.

INTERNAL CORNERS

Step 1

Without cutting BUTYNOL simply fold a ‘pig’s ear’ corner

as shown. the angle fold should be behind the main sheet.

NOTE: Fillets must be used on all internal corners.

FLASHING – EXISTING PIPES

Step 1

Under flash pipe with 100mm

BUTYNOL flashing tape.

Step 2

Bond BUTYNOL to 100mm past pipe.

N.B. When flashing black BUTYNOL use black detail tape.

Step 3

Bond continuation of BUTYNOL to overlap base sheet and

beyond pipe 100mm.

 

Step 4

Apply another collar of flashing tape then bond final 70mm

cover strip. DO NOT STRETCH STRIP.

FLASHING – NEW PIPE

Step 1

Pipe is raised through smaller diameter hole in BUTYNOL

forcing edge upwards to create upstand

Step 2

After pulling pipe down approximately 1 cm to sharpen

corner tape upstanding BUTYNOL to pipe using ARDEX

WA 98 Adhesive and detail tape. Upstand may be

mechanically secured using a steel band.

N.B. If flashing tape is used it MUST NOT be left

exposed. A cover strip of BUTYNOL must be applied

over the flashing tape to finish.

TAPING SUBSTRATE SHEET

All joints between substrate sheets of Plywood should be

taped to prevent stressing of the BUTYNOL in case of

marked timber movement.

BOXED GUTTER AND PARAPET DOWNTURN

Butynol®

Roofing

FORMING DOWNTURN IN GUTTER

FOR CIRCULAR DOWNPIPE

Cut P.V.C. pipe should be compressed into smaller

diameter then coated with ARDEX WA 98 Butynol

Adhesive and inserted in Downpipe finishing just below

flush. Finished with a bead of Butynol Sealant.

Loose Laid Application of Butynol Roofing

Materials used shall be as previously specified. When the

surface is suitably prepared a large fully vulcanised Butynol

sheet or sheets can be unrolled and spread over the

prepared area and allowed to remain in this position for

approximately one hour to relieve stresses induced by

manufacture and storage. If necessary for ease of

handling these sheets can be supplied in varying sizes

and vulcanised on site using an ARDEX vulcanising

machine or using seam tape with ARDEX WPM 299

seam primer.

The Butynol sheet shall be set out in the exact position in

which it will be finally required and whilst it is held firmly in

place it shall be folded back at least one metre from the

roof’s surrounding parapet or wall to allow the application

of adhesive to that area of the exposed substrate.

ARDEX WA 98 Adhesive may be applied to the substrate

and the corresponding area of BUTYNOL sheeting which

may then when the adhesive is touch dry be worked back

into its required position avoiding wrinkles and the inclusion

of air bubbles.

Upon completion of the detail work parapets drains and

rainheads etc a layer of rounded gravel 30-40mm should

be applied up to 50mm deep over a layer of Geo Textile

Fabric for protection of the Butynol sheet.

Care must be taken at outlets to ensure the ballast cannot

enter or cause a blockage that prevents rainwater from

leaving the roof area. Maintenance paths should be

created to air-conditioning or roof plant with concrete tiles.

Effects on the membrane in areas of high wind can be

eliminated by stabilising the ballast with cement. Dry

cement should be broadcast over the 30-40mm gravel

with a broad mouth shovel and left to hydrate or lightly

sprayed with water to set off.

If possible a water test should be carried out prior to the

application of ballast.

Note: Minimum pitch 1.5° to comply.