Incredibly versatile waterproofing system that is suited to all new build and refurbishment applications including overlay, warm roof, inverted roof and walkway situations.
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The Classic Choice – Available in 5 10 and 25 year Warrantied Options – Bituminous waterproofing systems are designed to protect residential and commercial buildings. Bitumen (asphalt or coal-tar pitch) is a mixed substance made up of organic liquids that are highly sticky, viscous, and waterproof. These systems are sometimes used to construct roofs, in the form of roofing felt or roll roofing products.

Reinforced bitumen membranes (RBM), commonly known as roofing felts, are specially formulated polymer modified bitumen sheets used for roofing and waterproofing applications. Strata are proud suppliers of the Danosa POLYDAN family of products. Traditionally, bituminous systems are applied with a gas torch (flame), our POLYDAN family of products hosts a variety of self-adhered and thermo-adhered membranes, which are applied flame-free.

POLYDAN membranes are comprised of 3 key components: a polymer modified bitumen compound, a reinforcement layer and a variety of upper and lower surface finishes. Varying any of these components changes the characteristics of the membranes and this allows for a variety of performance specifications and applications to be accommodated with the system range.

The choice of membranes and attachment choices available opens a range of specification options which can be incorporated into a full system specification for Warm, Cold and Inverted roof applications. Your system can then be customised to achieve a number of performance requirements such as thermal efficiency and reduction of external sound. Each POLYDAN membrane is reinforced internally with a heavy polyester layer, providing additional strength and resistance to potential damage.



Jaguar Landrover – Halewood – 22000m2
Chimney Corner Hotel – Mallusk – 1900m2
Ten Square Hotel – Belfast – 800m2
Clarion Hotel – Carrickfergus – 750m2
Ballymena Golf Club – Ballymena – 600m2
Tower Centre – Ballymena – 800m2
Kilroot Industrial Estate – Kilroot – 5000m2
Northern Ireland Electricity – Various – 6000m2
ESB – Various – 3000m2
Housing Executive – Various – 5000m2
Queens University – Belfast – 300m2