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How to waterproof balcony with sheet membrane:   
Wrimco SBS Granules Membrane 4mm torch applied to dry smooth concrete or plywood to falls.
Fully bonded to ensure no possibility of water tracking under the membrane, and for greater resistance to damage.  Granules give fire & UV resistance.

Wrimco SBS Granules Membrane 4mm torch applied to dry smooth concrete or plywood to falls, then Polypads  to make pavers level.

1. Mortar with reinforcement.   
2. Wrimco SBS membrane fully bonded.
Granules may be used under tiles to bond mortar to stone chips direct using Tiling Grout.
1. Insulation and Protection Board  PB4.    
2. Wrimco SBS membrane fully bonded. 
Concrete pavers on  Sand bed or sand and cement bed.

Specification as follows:


Waterproof roof using Wrimco SBS 3 mm thick Sopralene Flam 180 at the single selvedge, torch applied to the dry concrete, plywood or FC surface. Hot tool chamfer all edges to eliminate capillaries. Where there are internal drains in exposed roofs, degranulate using Wrimco Degranulator to provide a double selvedge.


Before applying, all lumps of cement to be removed and indentations of holes filled with Screedbond Styrene-Butadiene emulsion mortar, followed by a moisture barrier of Screedbond/cement slurry cross rolled when required - 20 litres and bag cement covers 100 sqm.


An extra layer of 250 mm Sopralene Flam 180 wide to be applied over expansion joints with flame resistant glass wool to act as a bond breaker. Detail angles and projections with Sopralene Flam 180 to provide two layers at all such critical points.


All vertical ends to be fastened mechanically or turned over and fixed. Trim exposed edges with Construction AP one-part urethane sealant or acrylic membrane if required. Side lap 50/75 mm. End lap 75/100 mm and burn in granules.




If additional insurance required for exposed roofs, apply Sopralene Flam Granules to a base layer of Sopralene Flam 180, i.e. a two layer system. If a smooth finish is required for adhering plastic grass, butt the two layers instead of the normal overlap. 


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