No, Dryseal is a factory made pre-cured membrane supplied in 6m x 1.25m rolls with 3 metre edge trims designed to suit many interface and roof edge profiles. The only ‘wet’ work is on the sheet and edge trim overlaps, when a 450 gramme chopped strand glass fibre mat, laminating tissue and resin are used to fuse the high adhesion surfaces together. This usually amounts to under 10% of the roof area.
Yes. The standard top coat colours are light and dark grey, but we can match any RAL or BS colour, as long as a minimum quantity of 300 kilograms is ordered. Costs vary according to the colour chosen. Examples of different colours can be seen here.
Standard Dryseal top coat colours are outlined in red. Alternative colours are available to special order.
Yes, in a ‘warm roof’ configuration, Dryseal is laid over rigid polyisocyanurate (PIR) flat roof insulation board using a vapour control layer underneath to provide a Thermal Performance or ‘U’ value which complies with Building Regulations. We can provide official calculations from manufacturers showing the required insulation thickness to achieve a target ‘U’ value.
Dryseal is normally laid to an actual fall of 1:60 for aesthetic and roof safety reasons. However, our BBA Agrément Certificate confirms the system can be laid to ‘zero’ falls (less than 1:80), as it is unaffected by standing water. Dryseal can also be easily used for vertical work, e.g. on a mansard or parapet.
If the roof deck is sound and fit for mechanical fixing, Dryseal can be used to overlay the existing roof construction. ‘Pull out’ tests may be needed to determine the frequency and security of fixings. NOTE – ‘Stramit’ straw board and chipboard are unsuitable for mechanical fixing.
For terraces and balconies, Dryseal is a suitable waterproofing layer, but requires protection against accidental damage.
All types of green and brown roofs can be installed over Dryseal, without any need for a root barrier.
Please contact our Technical Department for further advice and information.
No. As Dryseal is mechanically fixed to allow expansion and contraction between the roof covering, insulation and structure, the membrane can expand and contract depending on temperature. The resulting cosmetic undulation may be most evident when new. In time, the product will settle down.
Dryseal’s inherent stability and inert nature means that it can be easily repaired throughout its service life. This must be done by an Approved Contractor for Guarantee purposes.
Click here to view our Dryseal Guarantee