Hi everyone
I want to know what is the best technique for waterproofing a perimeter retaining wall of a concrete building and also drainage of it?
Regards
MJM
For waterproofing the retaining wall , two types of membranes are used
1) cosmofin - Cosmofin is a reinforced high quality flexible PVC
benifits of cosmofin
Can be installed over damp substrates
Can be used in new & remedial applications
Excellent stockholding in Australia
UV stable
Hot air welded overlaps/connections
Customised foam adhesive (LLV) for bonding
Plant roots resistant (FLL tested & Din En 13948)
High puncture & impact resistance
Recyclable
Excellent dimensional stability
Welds directly to PVC pipes
Complete ancillary system
5 x standard profiles available-Specials made to order
Hot Air & Solvent Weldable
Free of Toxins and Heavy Metals
Can be strip bonded, loose laid or mechanically fastened
Safe in Permanently Wet Areas
Acid, Alkali & Micro-organism Resistant
2) walfin-Wolfin Waterproofing Systems are a single ply high polymer roofing & waterproofing sheet membrane that are environmentally friendly, recyclable, UV Stable & available in two versions: Loose-Laid (IB) and Bonded (GWSK).
benifits of walfin
excellent chemical resistance
up to 350% elongation
bitumen compatible
root resistant-tested
A proven traditional way of doing it:
Dig a trench by and around perimeter down to about 0,60 to 0,50 cm below lowest floor level.
Shield with waterproof material the outer face of perimeter's fabrics going above that level.
Protect the waterproof shield (for example, with cm. wire-mesh cement-concrete layer)
Make a +- 20 cm rolling (or clean) stone bed on the bottom of the trench and rest on it a line of drainage pipes around the entire perimeter (connect it to the general drainage siystem).
Cover it whit an additional stone layer; fill the trench… and done.
Here's a typical schematic detail of the sort of perimeter drain Bernardo described:
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