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FAQs

Is Dryseal a 'wet lay' GRP system?

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.

Is Dryseal available in different colours?

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 100 kilograms is ordered. Costs vary according to the colour chosen. Examples of different colours can be seen here.

Dryseal colour chart

Standard Dryseal top coat colours are outlined in red. Alternative colours are available to special order.

If I use Dryseal to replace sheet metal, is there any scrap value in it?
Dryseal can be finished in dark grey incorporating decorative rolls to appear similar to lead, but it has no scrap value. Our Secured by Design accreditation confirms that Dryseal is an “officially recommended product for lead replacement, deterring theft and reducing fear of theft”.
Can I insulate a Dryseal roof?

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.

What is the minimum gradient or 'fall' required for Dryseal to be used?

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.

Should the existing roof covering be removed prior to fitting Dryseal?

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.

Is Dryseal suitable for balconies and green roofs?

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.

In some photos, I notice that the surface of Dryseal undulates. Should I be worried?

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.

Is Dryseal easy to repair?

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.

Can I purchase and install Dryseal?

No. Only Dryseal Approved Contractors can install the system. Click here for Approved Contractors in Ireland.
If you are interested in becoming a Dryseal contractor, please contact us by e-mail enquiries@dryseal.ie

What does the Dryseal guarantee cover?

Click here to view our Dryseal Guarantee

Where can I get a quote for Dryseal?

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