Dimpled high density polyethylene protection membrane
abedrain® 20 is a dimpled high density polyethylene (HDPE) membrane with 20 mm dimples.
abedrain® 20 can be used in applications that require extra drainage capacity, protection of the waterproofing membrane and soil stabilisation.
Other uses are:
- Flat roofs
- Roof gardens
- Retaining walls
- 20 mm raised dimples for increased drainage
- General purpose product
- Excellent value
- Resistance to chemicals usually found in soil and groundwater
- Vertical application
- Protection of the waterproofing membrane
- Secondary waterproofing membrane
- Thermal control
Typical Physical Properties
Download technical datasheet.
For the protection of walls:
The surface area must be waterproofed according to a.b.e.® specification. We recommend the application of heat infused membranes in accordance with a.b.e.® specification. Ensure that the waterproofing membrane is completely covered with abedrain® 20 for maximum protection. Measure the height of the wall including a flap which must be folded back and wrapped around the drainage pipe. Allow an additional 100 mm above the finished ground level before cutting the sheet. Fix the sheet just above the waterproofing membrane with the dimples towards the wall being careful not to damage the waterproofing membrane. Should it be necessary to overlap the sheets then 150 mm would be sufficient (3 dimples). Apply super laykold® waterproofing tape 100 mm wide along the flat part of the product for this purpose. Place the drainage pipe on the abedrain® 20 after having first placed a layer of drainage material under the pipe. Cover the pipe with some drainage material to keep everything in place before backfilling. Finish off the abedrain® 20 at least 100 mm above the finished ground level and cover with a counter flashing.
For drainage and protection of roof gardens:
The surface area must be waterproofed according to a.b.e.® specification. This is not a primary waterproofing membrane but is recommended for buried dual layer system applications. The first layer consisting of a 4 mm torch-on will be abedex® unigum followed by an antiroot bituminous membrane such as abedex® AR.
Lay abedrain® 20 with the dimples facing downwards. Should it be necessary to overlap then 150 mm would be sufficient (3 dimples). Apply super laykold® waterproofing tape 100 mm wide along the flat part of the product for this purpose Where required place a geotextile membrane loosely on top of the abedrain® 20 before spreading out the soil. This is important as the soil would otherwise fill the dimples and thereby reduce water drainage. Spread out the soil according to the instructions of a qualified landscaper.
For the protection of flat roofs and terraces:
We recommend applying an abedex® waterproofing membrane prior to laying abedrain® 20. On top of the bituminous membrane lay abedrain® 20 with the dimples upwards. Should it be necessary to overlap, then 150 mm would be sufficient (3 dimples) Apply super laykold® waterproofing tape 100 mm wide along the flat part of the product for this purpose. Place the finishing layer of course riversand followed by general backfill on top of abedrain® 20.
Do not butt-joint sheets.
Install abedrain® 20 as supplied using an overlap of 150 mm between the sheets resulting in an overall coverage of 37 m2 per roll.
The drainage and protection membrane will be abedrain® 20 a dimpled high density polyethylene protection membrane as supplied by a.b.e.® .
The abedrain® 20 will be applied in accordance with the recommendations of a.b.e.®
In order to guarantee the quality and characteristics of the abedrain® 20 product, it is recommended to use the range of accessories specifically studied for each purpose. Please consult the technical department at a.b.e.®
abedrain® 20 is supplied 5 rolls per pallet and wrapped for protection.
Handling & Storage
The product has no expiry date. Keep out of direct sunlight for extensive periods. No heavy loads are to be placed or packed on top of the product.
Health & Safety
No known hazards.
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 accept any liability for application – because a.b.e.® has no direct or
continuous control over where and how a.b.e.® products are applied.
Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total
a.b.e.® has a wealth of technical and practical experience built up over the years in the company’s pursuit of excellence in building and construction