To protect the waterproof membrane of retaining walls, use high performing EXPOL ThermaSlab.
Made from expanded polystyrene (EPS), EXPOL ThermaSlab is a durable foam board that is easy to handle on site and quick to install.
EXPOL ThermaSlab is available in a range of thicknesses, and offers long-term protection when using gravel or scoria for drainage.
EXPOL also supply EXPOL-X and EXPOL StyroDrain for protection, insulation and drainage of retaining walls.
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View our short video highlighting the main products used when building retaining walls.
Choose your thickness
IDEAL USES
When using gravel or scoria for drainage, EXPOL ThermaSlab provides long-lasting protection of the waterproof membrane. EXPOL ThermaSlab is available in a range of thicknesses. When the wall is higher than 1.2 metres, a thicker board is recommended to protect the waterproof membrane from damage.
EXPOL ThermaSlab is also suitable for use in concrete slab insulation, wall insulation, cladding insulation and skillion roof insulation.
MORE ABOUT EXPOL THERMASLAB
Made from expanded polystyrene (EPS), EXPOL ThermaSlab is a rigid foam board that retains its strength and shape for the lifetime of the building.
EXPOL ThermaSlab protects the waterproof membrane of retaining walls, ensuring its performance is not affected by moisture.
EXPOL ThermaSlab comes in easy to handle sheets in a range of sizes. Custom sizes are available on request.
In applications where insulation is required, use EXPOL-X for an excellent exterior insulation solution that is also waterproof. EXPOL StyroDrain is an alternative to retaining wall drainage material such as scoria or gravel.
SYSTEM COMPONENTS
EXPOL supplies a water-based glue to adhere polystyrene to most surfaces. NOTE - Glue isn't generally required for retaining walls.
HOW MUCH DO I NEED
EXPOL ThermaSlab comes in lengths of 2400mm, 2450mm, 2700mm, 3600mm and 4800mm. Custom sizes are available upon request.
INSTALLATION INSTRUCTIONS
Available in a full sheet, EXPOL ThermaSlab is fast and easy to install. A lightweight product, it is easy to move around the site.
EXPOL ThermaSlab is used to add insulation to the exterior of a retaining wall. It will also give protection to the waterproofing membrane or tanking on the retaining wall. This is important so the back fill material (scoria) does not damage the membrane.
Place ThermaSlab hard up against the retaining wall, after the water proofing membrane or tanking has been applied. ThermaSlab should be held in place while the drainage material is added. EXPOL supplies a construction adhesive for this purpose.
EXPOL ThermaSlab should cover all waterproofing membrane and tanking. Ensure EXPOL ThermaSlab sheets are not exposed at the top of the wall.
See our Masterspec document for further information.
Technical information
FREQUENTLY ASKED QUESTIONS
The unique matrix structure of expanded polystyrene (EPS) creates block rigidity making it an excellent choice for retaining walls as it will not sag or slump over time.
The closed cell construction of expanded polystyrene (EPS) ensures it resists any adverse effects of water.
EXPOL ThermaSlab comes in lengths of 2400mm, 2450mm, 2700mm, 3600mm and 4800mm in various thicknesses. Custom sizes are available upon request.
For exterior insulation of retaining walls, use EXPOL-X.
No. EXPOL ThermaSlab is not a drainage material. Use EXPOL StyroDrain for a lightweight solution for retaining wall drainage.
WHERE TO BUY
EXPOL products are available at a number of leading building products stores. Find your nearest stockist here.
View Expol Distributors in a larger map
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