What is a wall dormer?
A wall dormer is a dormer with a window whose front face is in the same plane as the wall of the building below. In Dutch the front wall of such a dormer is called a vlaamse gevel. The facade of the house continues up into the dormer, instead of the dormer being set back part way up the roof slope. As a rule the eaves and gutter line are interrupted.
Characteristics
- The face only: the Dutch term refers to the part of the dormer on the facade side, not the whole front elevation of the building.
- Any gable shape: in the Netherlands it is often a stepped gable with a few steps, but neck, bell, pointed and spout gables also occur.
- Material: usually brick, as a continuation of the facade brickwork.
- Height: it can rise into a full gable, with the dormer ridge reaching the main ridge.
- Gutter: usually broken by the dormer, though there are examples where the gutter runs through.
The Dutch term appears to be used only in the Netherlands, not in Flanders.
Application
Wall dormers are common on older houses and villas, for example as a central feature in the facade or above a balcony with French doors. They add headroom and daylight to the attic floor.
Tips
- Drainage with a broken gutter: each gutter section beside the dormer needs its own outlet or a sound connection. During maintenance, check that water does not collect against the brickwork.
- Roof-to-wall junctions: the joints between roof slope and dormer cheeks are vulnerable. Make sure lead flashings and soakers are properly fitted.
- Permission: a new roof extension on the street side usually needs consent. Check with the local authority first, especially for listed buildings or conservation areas.
- Structure: because the facade runs through, the wall carries part of the dormer. Have cracks or movement assessed by a structural engineer.
Related terms
- Dormer
- Roof house
- Dordrecht gable
- Gelderland gable
- Stepped gable
- Gutter
Want to learn more about construction terms? Visit our knowledge base at fredsdiyplans.com.