Structural Waterproofing

Damp Proof Membranes

Icopal, one of the world’s largest manufacturers of waterproofing products, has long been a pioneer in the development of damp proof and radon resistant membranes.

Modern construction trends have placed greater emphasis on the need for higher quality, better performance and greater durability, accommodating the demands of building design. Our range of damp proofing membranes gives you a greater choice whatever your building design, location and exposure.

In order to assist designers, builders and bricklayers Icopal provide the very best in performance from traditional DPM’s for basic damp proofing for housing to the very latest in technology providing both excellent waterproofing, ease of installation and resistance to radon ground gases.

Product Range  

Loose laid, polyethylene damp proof membranes for horizontal ground supported or suspended slab applications without hydrostatic water pressure

Membrane Selection Guide


Damp Proof Membranes (reinforced)

Monarflex Ultra DPM’s are manufactured from two virgin polyethylene layers with a strong reinforcement grid sandwiched in between. The reinforcement means the membrane is designed to withstand the rigours of a busy building site and to overcome the problems that can arise from using ordinary non reinforced DPM’s.
Read more about Monarflex Ultra damp proof membranes


Monarflex Ultra 250 & 300 Damp Proof Membranes


Damp Proof Membranes (unreinforced) 

Monarflex Polyethylene DPM’s are manufactured from blended polyethylenes, which remain flexible at low temperatures and stable at elevated temperatures. They are resistant to ageing and satisfactory for use as a DPM and when properly sealed and detailed to restrict the ingress of moisture.
Read more about Monarflex 1200 DPM's
Read more about Monarflex 1000 DPM's

monarflex dpm's
Monarflex 1200 Gauge Damp Proof Membrane
Monarflex 1000 Gauge Damp Proof Membrane

Radon Gas Resistant Damp Proof Membranes


Monarflex Reflex Super - Radon Barrier Membrane

Monarflex Reflex Super is a five layer high performance radon barrier membrane formed of aluminium foil and a polyester reinforcing grid sealed between layers of virgin LDPE.
Use Reflex Super for medium to high Radon concentrations.
Read more about Monarflex Reflex Super radon barrier membranes

Monarflex Reflex Super

Monarflex Reflex Super - Radon Barrier Membrane

Monarflex RAC - Radon Barrier Membrane

Monarflex RAC is a specially designed radon barrier membrane with multiple layers consisting of several layers of blown virgin polyethylene (LDPE) film, reinforced polyester scrim and a 12µm aluminum layer laminated together by several coater layers to a tough and durable gas membrane.
Use Monarflex RAC for medium to high Radon concentrations.
Read more Monarflex RAC radon barrier membranes

Monarflex RAC
Monarflex RAC - Radon Barrier Membrane

Monarflex RMB400 - Radon Barrier Membrane

Monarflex RMB400 is a three layer radon barrier membrane formed from two layers of low density, virgin polyethylene with a polyester reinforcing grid between to give high strength and tear resistance.
Use Monarflex RMB400 for low to medium Radon concentrations. 
Read more Monarflex RMB400 radon barrier membranes

Monarflex RMB400

Monarflex Necoseal - Radon Barrier Membrane

Monarflex® Necoseal is a virgin blend un-reinforced co-polymer polyethylene membrane. When used as part of the full Monarflex® radon protection system it provides an effective radon, air-tightness and moisture seal in the foundations of a new building.
Use Monarflex Necoseal for low to medium Radon concentrations.
Read more Monarflex Necoseal radon barrier membranes

Necoseal - Radon Barrier Membrane


Accessories Range

A range of specially designed accessories complements our DPM range, ensuring waterproofing performance and in case of radon gas keeps it tight and even ventilates the dangerous gas away from the habitat area. The accessories also make for speedier and secure installation and complying with the requirements of the current Codes of Practice.
See the accessory range


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