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CAVITY DRAIN MEMBRANES

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	GENERAL PRINCIPLES (top)


	Almost all basement structures are likely to be subjected to water pressure during some period of their life. BS 8102:1990 considers that "drained protection", in other words, a cavity drain membrane fitted to the structure, is the most effective and trouble free type of water resisting construction.
	Cavity drain membranes provide an alternative to conventional cementitious tanking systems, which work by holding the water back. Cavity drain membranes work on the principle of allowing water to continue to penetrate the structure but control it in the air gap and divert it to a suitable drainage point. They do not allow pressure to build up against the internal construction and the air gap behind the membrane allows the structure to breathe and to some extent dry out.
	The membranes are loose laid on floors and fixed to walls using special plugs and sealing materials, with little or no preparation required to the substrate. Once the membrane has been fitted, wall surfaces can be dry lined or plastered directly and floors can be screeded or a floating dry board system installed. This method of waterproofing allows decoration and floor finishes to be completed almost immediately, without long drying out periods.
	PAM offers technical seminars covering the specification and installation of cavity drain membranes for architects, contractors and other interested organisations. Please contact PAM 01942 887920 for further information.

	FOR INTERNAL USE - PLATON MULTI (top)


-	BBA approved
-	5mm PP cavity drain membrane
-	fast track solution for walls or floors
-	suitable for use above or below ground
-	impermeable to water, gas and water vapour
	Platon Multi can be dry lined on walls, screeded, or finished with a dry board system on floors. Suitable for floors in industrial buildings, it will transfer loading through screed layers to the underlying concrete floor to be upgraded. Platon Multi can be used in conjunction with other Platon membranes and the PAM Aqua Channel and Pump system.

TECHNICAL DATA - PLATON MULTI (top)

	PLATON PLASTER BASE (top)


-	BBA approved
-	HDPE cavity drain membrane for direct plastering
-	single component, no mesh or fabric layer
-	unique undercut stud design creates mechanical key for plaster
-	easy to cut, fix and seal
-	impermeable to water, gas and water vapour
-	compatible with other Platon membranes
	Platon Plaster Base can be installed on internal walls and vaulted ceilings above or below ground level. The substrate remains visible through the clear membrane for precise fixing. It is suitable for use with sand and cement renders and most lightweight and renovating plasters - however please check with PAM for further product advice.

TECHNICAL DATA - PLATON PLASTER BASE (top)

	PLATON P5 (top)


-	economical 5mm HDPE cavity drain membrane
-	suitable for both walls and floors, above or below ground
-	impermeable to water, gas and water vapour
-	compatible with other Platon membranes
	P5 is a tough and economically priced membrane for both remedial and new build construction. It is suitable for sub-ground tanking and also for use above ground to isolate walls which are damp or contaminated with salts.
	P5 can be dry lined on walls and screeded or a floating dry board system fitted on floors, and vaulted ceilings above or below ground level.

TECHNICAL DATA - PLATON P5 (top)

	PLATON P20 (top)


-	BBA approved
-	heavy duty, deep studded HDPE cavity drain membrane
-	principally used on floors
-	for areas subject to high volume water penetration
-	impermeable to water, gas and water vapour
	P20 is a high capacity drainage membrane recommended for use on all floor applications below ground due to its ability to control free flowing water. The deep stud profile is designed to resist blockages caused by lime deposits.

TECHNICAL DATA - PLATON P20 (top)