Flat Roofing Lancing

GRP Flat Roofing — What's Involved in Lancing

Survey and Deck Assessment

Every flat roofing job starts with an assessment of the existing deck — the plywood or OSB boarding beneath the current covering. If the deck is sound, we can overlay with GRP directly, reducing cost and disruption. If the deck has delaminated or rotted (common on coastal BN15 properties where moisture has been tracking under the felt for years), we strip back to the joists and relay new deck before applying GRP. We tell you which applies before you commit.

GRP Application in Lancing

GRP is mixed and applied on-site in Lancing using pre-accelerated resin systems that cure reliably even in the cooler temperatures common in autumn and winter on this stretch of coast. The gel coat topcoat is applied the same day, giving a hard, seamless, UV-stable surface within 24 hours. On properties along the western side of BN15 near the River Adur — including Manor Road and the streets approaching Shoreham — we specify enhanced drainage provision given the above-average ambient humidity in this area.

Drainage and Upstands

Correct drainage fall is as important as the membrane itself. A GRP flat roof with inadequate fall will pond water — and standing water eventually finds its way through any system. We set a minimum 1:80 fall on all Lancing flat roofs and specify upstands of at least 150mm at all perimeter and abutment edges. On coastal BN15 properties, we increase upstand height to 200mm where direct spray exposure is a factor.