Technical Reference
Treatment Procedures.
Step-by-step waterproofing, structural repair and rehabilitation methods, grouped by the chemistry they use, each mapped to the Armstrong products that carry it out. Select a treatment to view the full procedure and product recommendations.
Treatment · Polymer mortars & concrete repair
Polymer Screed Concrete Overlay
Flexible cementitious coat with a polymer concrete overlay
Applications
Roof slabs and terracesSloped roofsTank floorsBridges and damsCeilings needing added steel
Procedure
- Chip existing treatments, remove debris and clean off dirt and dust. Remove any tar or bitumen felt with the contaminated layer.
- Dampen the surface thoroughly.
- Apply two coats of ROOFCOAT FLEXI 100 mixed with cement.
- Immediately lay 1:2:4 screed concrete with 6 to 12 mm graded aggregate and CONPROOF 500 at 500 ml per 50 kg of cement, about 40 mm on average to make the slope. Where a polymer concrete is specified, use ROOFCRETE AR 576 at about 2 litres per 50 kg bag.
- Lay 1:4 cement mortar with CONPROOF 500 at 6 to 12 mm average thickness, with a neat finish.
- Cut joints in the screed and cure it.
Important Suggestions
Chip deteriorated concrete until a sound base is reached; the overlay is only as good as its bond.
Why This Treatment?
A polymer concrete overlay gives high strength, strong bonding and a waterproof base where water stands, mortar has de-bonded or the slab is heavily cracked.
Recommended Products
Dosage & Coverage
ROOFCOAT FLEXI 1001 litre + 2 kg cement
CONPROOF 500500 ml per 50 kg cement
ROOFCRETE AR 576About 2 litres per 50 kg cement
Related Solution Guides
Need this for your project?
Technical support and product recommendations from Armstrong's engineers. Toll free 1800 103 2034.