Dormer roofing detailed carefully across Stockton-on-Tees homes

About this service

Compact roofs with several critical junctions

A dormer projects through an existing pitched roof, creating a compact roof with a surprising number of places for water to find. Its top, cheeks and front face must connect with the main covering as a joined system. Valleys, abutments and flashings guide water around the new structure, while the roof form must suit its dimensions and drainage. Dormers may use a flat membrane roof or a pitched tile or slate finish where the design supports it. Headroom and external proportions can also shape the practical choice.

Weatherproofing around every dormer face

We plan the covering around the relationship between the dormer and main roof. Flat designs need formed falls and secure perimeter details, while pitched versions require suitable underlay, battens and coverings. The cheeks and front edges must meet both areas cleanly. We also account for insulation and ventilation within the build-up, as warm internal air and cold external surfaces are not a happy pairing when moisture is trapped. Precise work at the junctions protects the dormer and the roof surrounding it.

Frequently asked questions