A technically superior factory manufactured (BS EN ISO 9002) 'system' of preformed GRP membrane & trims mechanically fixed then applied with a polyurethane top coat resin applied in the colour of your choice...
DRYSEAL compared to traditional systems
DRYSEAL addresses the major factors in the failure of traditional flat and low pitched roof systems to provide a reliable performance.
More than half the failures in flat roofs are attributable to splits and cracks produced by continuous concentrated movements of the substrate. (Source: recent BRE survey).
The majority of failures were on fully bonded systems having inadequate provision to isolate the membrane from other building materials.
DRYSEAL Flat roof System - Substrate movement
One of DRYSEAL's major advantages is the fact that the GRP membrane is primarily isolated from the effects of minor movement in the substrate which substantially reduces the possibility of membrane failure in the DRYSEAL system. This contrasts with the typical installation whereby the membrane is fully bonded o the substrate surface.
In a fully bonded system any movement of the substrate will also be suffered by the membrane surface.
For example, a 3mm gap or crack in the substrate which expands and contracts ± 2mm results in a 4mm movement by a fully bonded membbrane, a factor of ±0.6. Continual movement through expansion and contraction of the substrate will lead to membrane fatigue and its eventual fracture. DRYSEAL, mechanically fixed to the substrate every 350mm, with a similar expansion and contraction of ±2mm results in a factor of ±0.005.
Thermal movement of membrane
The effect of thermal movement is also considerably reduced with the DRYSEAL system because it is mechanically fixed. The Compression stresses of the GRP membrane due to expansion in warm weather conditions is negligible and the tensile stress on the membrane in cold weather conditions is considerably reduced.