The least noticeable part of your dormer is the most vulnerable
Nobody buys a dormer for the little flat roof on top. Yet that surface decides when the renovation comes.
Guides
Expert guides and tips
One layer of membrane decides whether your dormer stays dry
A dormer packs a lot of insulation into little space. That makes the order of the layers more important than their thickness.
A dormer sticks out — and it feels that in autumn
Where a roof slope lets wind slide past, a dormer catches it. The season for that starts earlier than most people think.
Your dormer was designed for the weather of its day
A dormer's drainage was sized for the downpour of its build year. That downpour has changed since.
A dormer sits lower than the ridge — and that is exactly the trap
Because you can almost reach it through the window, a dormer roof feels accessible. The figures say otherwise.
When a roof window is enough (and far cheaper)
Light or space — that is the question underneath the choice. The price gap between the two answers is a factor of eight.
Damp patch at the dormer: leak or condensation?
Symptom, the four places it can come from, and the distinction that decides who you call.
The dormer creaks or draughts in wind: what does that mean?
Symptom, why a dormer speaks up precisely in wind, and what you can read from it.
What does a dormer cost in 2026?
All guide prices in one place: prefab uPVC, bespoke wood and renovation — plus the factors that decide where you land in the band.
Dormers and permits: when is one permit-free?
Rear side often permit-free, front side almost never — the rules of thumb, the exceptions and what it means for your planning.
uPVC or wooden dormer? A decision guide
Prefab uPVC or bespoke carpentry: the price difference, the maintenance and the situations where wood is still the logical choice.
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