Daraflex

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Introduction
Concrete roofs
Wooden roofs
IBR roofs
Flower boxes
Foot traffic
Tanking


Waterproofingsystem

Discussion

DARAFLEX is a polymer modified anionic bitumen emulsion, which is used to impregnate a suitable geo-fabric thus forming a continuous waterproofing membrane.  Once completely dry the product becomes highly resistant to swelling or re-emulsification, a problem associated with other water based systems.  The product is supplied in 25Lt. and 210Lt. drums and should be used within two months of the date indicated on the container. Thorough stirring is required before use and the container must be protected against frost.

Physical Properties

Applications

                                             
The above applications are described fully on the various application instruction sheets.  Years of experience have resulted in comprehensive information on each application.  Deviation from the specified instructions will automatically invalidate any claim against non performance of the product, which in all circumstances, is restricted to replacement of product proven defective.
Technical assistance and applicator training are freely available to all approved users.

Introduction

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Daraflexsystem

WATERPROOFING OF CONCRETE ROOF

Discussion

Concrete roof decks normally consist of a slab screeded to fall with a sand cement mixture.  In the case of a new structure a minimum of 2 rain free weeks curing period is required before waterproofing.  In the case of an old roof, existing waterproofing should be removed and a drying period allowed appropriate to the amount of water penetration experienced.  This is sometimes difficult to determine and it is suggested that either our technical department is contacted or vent pipes be placed at 10m2 centres in the new waterproofing system.  Should excessive moisture be trapped in the screed bubbling will result.

Surface Preparation

All forms of surface contamination must be removed to ensure a smooth surface, free of any loose material, or any other barrier to adhesion.  Cracks or voids in the surface must be filled using HYPERCRETE (modified cementitious material) and allowed to cure for a minimum of 24 hours.  Should the parapets be rough a HYPERCRETE slurry should be applied over the area which is to receive the flashing.  Fullbore covers should be removed to facilitate “dressing in” the waterproofing.  It is recommended that the full-bores be checked to ensure that they function correctly.
Finally an assessment should be made as to what extent, if any, ponding is likely to occur.  Standing water present after rain and run-off in excess of 5mm in depth is considered as excessive and will invalidate any performance assurances.  A topping of HYPERCRETE in such areas is recommended.  Expansion joints (if present) should be sealed and a PVC slip sheet placed over the joint.  In no circumstances should the waterproofing be laid directly over the expansion joint.

Application         

Apply by brush or roller one coat of diluted DARAFLEX (60 part water, 40 part product) as a primer, at the rate of 1L/6m­­­2  Allow a minimum of 30 minutes drying.
Apply at the rate of 1L/m2 undiluted DARAFLEX and immediately embed the SBP Geo-Fabric into the wet product ensuring no creases or folds in the material.  Work the membrane into the DARAFLEX using a brush.  Product should be evident “striking through” the membrane and if this is not the case, too little product has been applied or the product has been allowed to dry before embedding the membrane.  At this point the bedding coat for the second run of membrane can be applied.
Apply the second run of membrane into the bedding coat in the same manner ensuring an additional coat at 1L/m2 between the 2 layers of membrane at the 100 mm overlap.

After allowing a minimum drying period of 45 minutes. Apply a coat of diluted DARAFLEX (90 part product, 10 part water) at the rate of .75L/m2.  Allow a minimum of 45 minutes drying period.
Apply a further similarly diluted final coat of DARAFLEX at the rate of .75l/m2.   It will be noted that a total of 2.5l/m2 of DARAFLEX has now been applied.  The minimum weight of the membrane alone shall be 100g/m2.  The total weight per m2 shall therefore be 1.5 kg
Note drying times are based on a temperature of 250 c min. and a R.H. of 60% max.

Flashings       

It is recommended that the membrane be turned up the parapets 150 mm.  A flashing strip of 300mm(available in pre-cut rolls of 20 m in length) should overlap the turn-up in such a manner that 100 mm of its width be on the horizontal plane and 200 mm on the vertical.

Finish coat               

A finishing coat of DARACOAT REFLECT Bitumenous Aluminium Paint, which is highly reflective, is recommended.

Application        

REFLECT:
After allowing the final DARAFLEX coating a minimum drying period of one full day the REFLECT may be applied.  The coating should not be applied later than one week of the final DARAFLEX application.  Using a paint roller apply REFLECT at the rate of 5m2/l.
NOTE:  The product should be well stirred before use and should be stirred periodically during application to ensure a consistent appearance.  The product must not be applied under wet conditions, and the drum once open must be protected against moisture.  Failure in doing so will result in a dull coppery appearance.
NOTE:  REFLECT is a solvent based material and as such is highly flammable in the wet state.
The completed system has a very bright silver appearance, which ensures excellent U.V. protection.  Maintenance repaints are recommended at three yearly intervals.  Owing to the flexibility differential between REFLECT and DARAFLEX imperfections in the coating may develop.  This is not abnormal and generally does not redevelop after the first maintenance coat.  The completed system is suitable for occasional light foot traffic only.
The completed system is resistant to rain after a period of 3 hours. However full resistance develops over a period of days and it is therefore critical that excessive ponding not be anticipated when using this system.

maintenance

A maintenance re-coat is recommended after three years.

Concrete Roofs

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Daraflexsystem

WATERPROOFING OF WOODEN BOARDED ROOFS

 Discussion

Boarded roofs generally display considerable movement.  Gaps of variable widths exist between boards and normally the locating nails work loose with time.

Surface Preparation

All forms of surface contamination must be removed to ensure a uniform surface, free of any barrier to adhesion.  Ensure that all locating nails are serving their function recommended.  Standing water present after rain and run-off in excess of 5 mm in depth is considered excessive and will invalidate any performance assurances.  Such potential areas shall receive a light topping of HYPERCRETE prior to waterproofing to ensure run-off.  A single ply roofing sheet, THERMOFLEX LITE, should now be laid over the entire area.  Tack location is recommended.  Clout nails should be located on the leading edge of each sheet +/- 100 mm apart.  The trailing edge of each sheet should overlap the tacked leading edge of the next sheet by a minimum of 75 mm.  Overlap is therefore loose allowing movement of the one sheet relative to the next.  The sheeting, as it is acting merely as a slip-sheet, need not be dressed up the parapets.  It is recommended however that a wooding fillet be tacked into place over the sheeting at the parapets.  The dimensions of this triangular fillet should be of the order of 50 mm in height, 60 mm base by 80 mm.
NOTE: The fillet must only be attached to the board and not to the parapet

Application         

Apply by brush or roller one coat of DARAFLEX PRIMER (60 part water, 40 part product) at the rate of 6m2/L  Allow a minimum of 30 minutes drying at 25o C and 60% R.H.
Apply at the rate of 1m2/L undiluted DARAFLEX and immediately embed the SBP Geo-Fabric into the wet product ensuring no creases or folds in the material.  Work the membrane into the DARAFLEX using a brush.  Product should be evident “striking through” the membrane and if this is not the case, too little product has been applied.  At this point additional DARAFLEX at the rate of 1m2/L should be applied in 100 mm wide strips along the edges of the membrane.
Apply the second run of membrane into the bedding coat in the same manner ensuring an additional coat at 1m2/L between the two layers of membrane at the 100 mm overlap.

After allowing a minimum drying period of 45 minutes at 25o C and 60% R.H. apply a coat of diluted DARAFLEX (90 part product, 10 part water) at the rate of .75L/m2.  Allow a minimum of 45 minutes drying period and apply a further similarly diluted final coat of DARAFLEX at the rate of .75L/m2. It will be noted that a total of 2.5L/m2 of DARAFLEX has now been applied.  The minimum weight of the membrane alone shall be 100g/m2.  The total weight per m2 shall therefore be:

Flashings       

It is recommended that the membrane be turned up the parapets 150 mm.  A flashing strip of 300 mm (available in pre-cut rolls of 20 m in length) should overlap the turn-up in such a manner that 100 mm of its width be on the horizontal plane and 200 mm on the vertical.

Finish coat               

A finishing coat of DARACOAT REFLECT Bitumenous Aluminium Paint, which is highly reflective, is recommended.

Application        

REFLECT:
After allowing the final DARAFLEX coating a minimum drying period of one full day at 25o C and 60% R.H. the REFLECT may be applied.  The coating should not be applied later than one week of the final DARAFLEX application.  Using a paint roller apply REFLECT at the rate of 1L/5m2.
NOTE:  The product should be well stirred before use and should be stirred periodically during application to ensure a consistent appearance.  The product must not be applied under wet conditions, and the drum once open must be protected against moisture.  Failure in doing so will result in a dull coppery appearance.
NOTE:  REFLECT is a solvent based material and as such is highly flammable in the wet state.
The completed system has a very bright silver appearance, which ensures excellent U.V. protection.  Maintenance repaints are recommended at three yearly intervals.  Owing to the flexibility differential between REFLECT and DARAFLEX imperfections in the coating may develop.  This is not abnormal and generally does not redevelop after the first maintenance coat.  The completed system is suitable for occasional light foot traffic only.

The completed system is resistant to rain after a period of 3 hours at 25oC and 60% R.H., however, full resistance develops over a period of days and it is therefore critical that excessive ponding not be anticipated when using this system.

Maintenance

A maintenance re-coat is recommended after three years.

Wooden Roofs

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Daraflexsystem

WATERPROOFING OF I.B.R. or CORRUGATED ROOFS

Discussion

I.B.R. and corrugated iron roofs exhibit a high degree of movement.  Securing bolts tend to work loose.  Corrosion is often present, additionally such roofs usually have been painted at some stage.  DARAFLEX, because of its ability to stretch is ideal when used in conjunction with a suitable membrane.

Surface  Preparation

Ensure that all securing bolts are effective and replace where necessary.  Excessive gaps between sheet overlaps (greater than 3 mm) should be treated as follows:
Drill and stitch by means of aluminium blind rivets at 100 mm intervals, thus reducing movement between sheets.  Roof cappings and flashing should receive the same treatment.
Inspect roof area for signs of corrosion.  Where present wire brush or scabble down to bright metal.  Apply a coating of DARACRYL DC4 rust inhibitor to the affected areas.
Old paint/coatings should be removed by means of a power driven circular wire cup brush 50 mm on either side of all joints to be waterproofed.  DARACRYL DC4 rust inhibitor shall be applied to this area.  Similarly all bolt heads shall be treated ensuring a clean rust inhibited circular area of a minimum diameter of 50 mm.

Application         

LAPS
Apply undiluted DARAFLEX along the laps in a strip exceeding 100 mm in width.  The application rate shall be 1l/m2.  Immediately unroll 100mm wide SBP geo fabric, into the wet product ensuring complete “bedding” of the membrane into the product, “working in” with a suitable paint brush.
It must be stressed that metal roofs attain high temperatures in summer and this can cause the DARAFLEX to dry very quickly.  In order that the membrane absorbs sufficient DARAFLEX it is essential that it still be wet when the membrane is laid.  To achieve this, in practice, do not apply product further than half a metre ahead of the membrane.  Poor adhesion will result should the membrane be placed into a too dry film.

Treat all laps in this manner.  Not sooner than 30 minutes at 25ºC and 60% RH after this application, a second coat of DARAFLEX diluted 90 parts product and 10 parts water, shall be applied over the now partially saturated membrane.  A final coat of similarly diluted product may be applied 30 minutes later. 
Both coatings shall be at the rate of .75L/m2.  At this stage it can be seen that 2.5L/m2 of product has been applied.  The now built up waterproofing membrane shall conform to the following weight specification:

BOLT HEADS
Cut out circular pieces of SBP geo fabric measuring 75 mm in diameter (pre cut SBP patches are available)
Apply undiluted DARAFLEX at the rate of 1L/m2 to the prepared circular area around and on top of the bolt head.  Place the prepared membrane into the wet product working it into place with a brush.  Allow a drying period of 30 minutes and recoat with undiluted DARAFLEX.  After a further drying period of 30 minutes apply a final coat of DARAFLEX.

Flashings       

It is recommended that the membrane be turned up the parapets 150 mm.  A flashing strip of 300 mm (available in pre-cut rolls of 20 m in length) should overlap the turn-up in such a manner that 100 mm of its width be on the horizontal plane and 200 mm on the vertical.

Finish coat               

A finishing coat of DARACOAT REFLECT Bitumenous Aluminium Paint, which is highly reflective, is recommended.

Application        

REFLECT:
After allowing the final DARAFLEX coating a minimum drying period of one full day at 25o C and 60% R.H. the REFLECT may be applied.  The coating should not be applied later than one week of the final DARAFLEX application.  Using a paint roller apply REFLECT at the rate of 1L/5m2.

NOTE:  The product should be well stirred before use and should be stirred periodically during application to ensure a consistent appearance.  The product must not be applied under wet conditions, and the drum once open must be protected against moisture.  Failure in doing so will result in a dull coppery appearance.
NOTE:  REFLECT is a solvent based material and as such is highly flammable in the wet state.
The completed system has a very bright silver appearance, which ensures excellent U.V. protection.  Maintenance repaints are recommended at three yearly intervals.  Owing to the flexibility differential between REFLECT and DARAFLEX imperfections in the coating may develop.  This is not abnormal and generally does not redevelop after the first maintenance coat.  The completed system is suitable for occasional light foot traffic only.

The completed system is resistant to rain after a period of 3 hours at 25oC and 65% R.H., however, full resistance develops over a period of days and it is therefore critical that excessive ponding not be anticipated when using this system.

Maintenance

A maintenance re-coat is recommended after three years.

IBR Rooofs

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Daraflexsystem

WATERPROOFING OF PLANTERS AND FLOWER BOXES

 Discussion

The requirements of a waterproofing system for the above are:  Resistance to constant dampness.  Resistance to root penetration.  A degree of mechanical resistance, as spades and gardening forks are used in the course of garden maintenance.
Drainage stones are normally placed beneath the soil and separated by a layer of geo-fabric.

Surface Preparation

All forms of surface contamination must be removed to ensure a smooth surface, free of any loose material, or any other barrier to adhesion.  Cracks and voids in the surface must be made good using HYPERCRETE, a plasticized cementitious material and allowed to cure for a minimum of 12 hours.  Should the planter box consist of a bricked structure, the whole internal area can be leveled using HYPERCRETE.

Application         

Apply by brush or roller one coat of DARAFLEX PRIMER (60 part water, 40 part product) at the rate of 6m2/l.  Allow a minimum of 30 minutes drying at 25o C and 60% R.H.
Apply at the rate of 1L/m2 undiluted DARAFLEX and immediately embed the SBP Geo-Fabric into the wet product ensuring no creases or folds in the material.  Work the membrane into the DARAFLEX using a brush.  Product should be evident “striking through” the membrane and if this is not the case, too little product has been applied.  At this point additional DARAFLEX at the rate of 1L/m2 should be applied in 100 mm wide strips along the edges of the membrane.
Apply the second run of membrane into the bedding coat in the same manner ensuring an additional coat at 1L/m2 between the two layers of membrane at the 100 mm overlap.
After allowing a minimum drying period of 45 minutes at 25o C and 60% R.H. apply a coat of diluted DARAFLEX (90 part product, 10 part water) at the rate of .75L/m2.  Allow a minimum of 45 minutes drying period and:
Apply a further similarly diluted final coat of DARAFLEX at the rate of .75L/m2.   It will be noted that a total of 2.5L/m2 of DARAFLEX has now been applied.  The minimum weight of the membrane alone shall be 130g/m2.  The total weight per m2 shall therefore be:

Finish Coat    
          
In order to provide mechanical protection, it is recommended that the flower box cavity is lined with cement fibre board, soft board or equivalent.

Flower Boxes

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Daraflex & Hyprcretesystem

WATERPROOFING OF HEAVY FOOT TRAFFICABLE AREAS

 Discussion

Flat roofs to be waterproofed with the DARAFLEX system sometimes have areas which will be subjected to more than occasional light foot traffic, i.e. wash lines, walkways and servants quarter areas.

Surface Preparation

All forms of surface contamination must be removed to ensure a smooth surface, free of any loose material, or any other barrier to adhesion.  Cracks or voids in the surface must be filled using HYPERCRETE a modified cementitious material and allowed to cure for a minimum of 24 hours.  Should the parapets be rough HYPERCRETE SLURRY should be applied over the area, which is to receive the flashing.  Fullbore covers should be removed to facilitate “dressing in” the waterproofing.  It is recommended that the full-bores be checked to ensure that they function correctly.
Finally an assessment should be made as to what extent, if any, ponding is likely to occur.  Standing water present after rain and run-off in excess of 5mm in depth is considered as excessive and will invalidate any performance assurances.  A topping of HYPERCRETE in such areas is recommended.  Expansion joints (if present) should be sealed and a PVC slip sheet placed.  In no circumstances should the waterproofing be laid directly over the expansion joint.

Application         

Apply by brush or roller one coat of DARAFLEX PRIMER (60 part water, 40 part product) at the rate of  1L/6m2  Allow a minimum of 30 minutes drying at 25o C and 60% R.H.
Apply at the rate of 1L/m2 undiluted DARAFLEX and immediately embed the SBP Geo-Fabric into the wet product ensuring no creases or folds in the material.  Work the membrane into the DARAFLEX using a brush.  Product should be evident “striking through” the membrane and if this is not the case, too little product has been applied.  At this point additional DARAFLEX at the rate of 1L/m2 should be applied in 100 mm wide strips along the edges of the membrane.
Apply the second run of membrane into the bedding coat in the same manner ensuring an additional coat at 1L/m2 between the two layers of membrane at the 100 mm overlap.

After allowing a minimum drying period of 45 minutes at 25o C and 60% R.H. apply a coat of diluted DARAFLEX (90 part product, 10 part water) at the rate of .75L/m2.  Allow a minimum of 45 minutes drying period and:
Apply a further similarly diluted final coat of DARAFLEX at the rate of .75L/m2.   It will be noted that a total of 2.5L/m2 of DARAFLEX has now been applied.  The minimum weight of the membrane alone shall be 130g/m2.  The total weight per m2 shall therefore be:

Flashings       

It is recommended that the membrane be turned up the parapets 150 mm.  A flashing strip of 300 mm (available in pre-cut rolls of 20 m in length) should overlap the turn-up in such a manner that 100 mm of its width be on the horizontal plane and 200 mm on the vertical.

Finish coat       

A finishing coat of DARACOAT REFLECT Bitumenous Aluminium Paint, which is highly reflective, is recommended.

The heavy foot trafficable areas are treated as follows.  Prepare HYPERCRETE cementitious slurry in the following manner.
In a suitable container, add 15L of HYPERCRETE to 6L of water. Slowly add 50kg’s of OP cement and mix  to a uniform lump free consistency. Add an additional 6L of water to adjust the viscosity to a workable slurry. Ensure that the DARAFLEX Membrane is clean and free of any barrier to adhesion.  Apply by means of brush or roller HYPERCRETE SLURRY to the DARAFLEX Membrane at the rate of 1L/m2 and immediately embed POLYPROPYLENE Geo-Fabric into the wet product.  Allowing 30 minutes drying time between coats, apply a further two applications of HYPERCRETE SLURRY at a rate of .75L/m2.
The completed system should be protected from rain for a period of 12 hours.

Foot Traffic

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Daraflexsystem

TANKING (WATERPROOFING) OF BASEMENTS

 Discussion

At the construction stage of any concrete structure which ultimately is beneath ground level, it is essential to guard against the ingress of moisture.  DARAFLEX due to its toughness, flexibility and ability to withstand constant moisture, is an economical solution.

Surface Preparation

Ensure a smooth dry surface free of any barrier to adhesion.  Cracks and void should be filled using HYPERCRETE – a plasticised cementitious compound.  Should the surface consist of rough brickwork, bagwash to a smooth finish, using a HYPERCRETE slurry.  Allow 24 hours drying period.

Application         

Apply by brush or roller one coat of DARAFLEX PRIMER (60 part water, 40 part product) at the rate of 6m2/l.  Allow a minimum of 30 minutes drying at 25o C and 60% R.H.
Apply at the rate of 1L/m2 undiluted DARAFLEX and immediately embed the SBP Geo-Fabric into the wet product ensuring no creases or folds in the material.  Work the membrane into the DARAFLEX using a brush.  Product should be evident “striking through” the membrane and if this is not the case, too little product has been applied.  At this point additional DARAFLEX at the rate of 1L/m2 should be applied in 100 mm wide strips along the edges of the membrane.
Apply the second run of membrane into the bedding coat in the same manner ensuring an additional coat at 1L/m2 between the two layers of membrane at the 100 mm overlap.
After allowing a minimum drying period of 45 minutes at 25o C and 60% R.H. apply a coat of diluted DARAFLEX (90 part product, 10 part water) at the rate of .75L/m2.  Allow a minimum of 45 minutes drying period and:
Apply a further similarly diluted final coat of DARAFLEX at the rate of .75L/m2.   It will be noted that a total of 2.5L/m2 of DARAFLEX has now been applied.  The minimum weight of the membrane alone shall be 100g/m2.  The total weight per m2 shall therefore be:

Finish coat               

No finish coat is required.

Note                                     

Caution should be exercised when back filling operations commence as sharp objects will damage the membrane.  In order to provide mechanical protection, it is recommended that the wall is lined with a cement fibre board, soft board or equivalent.
A cure period of two days should be allowed before back filling.

Tanking

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