Surface Preparation

Surface areas should be dry, clean and sound, free of voids, sharp protrusions or contaminants. The surfaces shall have a wooden trowelled finish, laid to a minimum of falls of 1:60.


1. New Areas
Prime all surfaces with, including all verges, and around outlets and protrusions and allow the solvent to flash off. Extremely porous surfaces should be re-primed.

2. Rejuvenation
Strip existing waterproofing before priming all surfaces with, including all verges, around outlets and protrusions and allow the solvent to flash off. Some existing waterproofing materials may be overlaid only in consultation with the a.b.e.® Technical Representative concerned.

  • abedex® unigum 4 mm
  • abe.®drain

Apply the layer of a abedex® unigum 4 mm, fully bonded by means of “torch on fusion” using propane gas, having side and end laps of 100 mm and 150 mm respectively. All upturns to be a minimum of 150 mm onto parapet walls.

A minimum of 150 mm sould protrude above finished ground level.

All corners to have a gusset fitted, 100 x 100 mm, apply abedex® unigum 4 mm fully bonded to the primed surface and prior to the waterproofing application.

Apply abe.®drain protection layer, covered with stone ballast.

The rolls are to run parallel to each other, centrally staggered to prevent joints overlapping.

See data sheet ‘Six Golden Rules’.


Counter flashing over the balance of the parapet is recommended using super laycryl or super laykold incorporating abe.® membrane, details as recommended in our datasheet. Ensure the lap over the torched membrane is at least 150 mm.


abedex® waterproofing membranes shall only be installed by contractors accredited by a.b.e.®.

Care must always be taken when working with open flames, potential fire hazard, and molten bitumen from the process, employ safety equipment and clothing where necessary.

All the products are to be applied in accordance with the manufacturers instructions.
All relevant data sheets are to be carefully read for additional information.

Important Note

This data sheet is issued as a guide to the use of the product(s) concerned.

Whilst a.b.e.® endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot – because a.b.e.®  has no direct or continuous control over where and how a.b.e.® products are applied.