Roofs in Central Portugal: how they are built
An old Portuguese roof is lovely to look at and rarely watertight. The stone houses of the interior almost always share the same combination: broken telhas, no vapour barrier, and insulation that exists only on paper. Come the first serious rain in November you see stains on the ceiling, or wet timber above the tie beams.
This page explains how such a roof is built, where it goes wrong, and what to look for when you get a quote. I do not take on roofing work myself: no roof replacement and no major repair. I work alone, and that is work for a roofer with a crew.
How a Portuguese roof is built
Most roofs in this region consist of timber purlins, cane or boarding, and on top of that the traditional red telhas. A sound system, provided it is checked regularly. The weak points are almost always the same four.
- Broken or slipped tiles. One tile is enough for a wet patch in the loft.
- A missing vapour barrier. By far the most neglected part. Without a membrana, warm indoor air condenses against the cold underside of the tiles and the timber rots from above.
- Gutters, rainwater goods and the chimney. Often the real cause of infiltrações: a blocked gutter, a sagging downpipe, or failing flashing around the chimney.
- Wet insulation. Lofts regularly hold soaked insulation that causes more damage than it prevents.
Telha barata or telha mediterrânica
Telha barata is cheaper, machine-made and quicker to lay, fine for outbuildings or a tight budget. Telha mediterrânica is heavier, more traditional in shape and lasts longer in practice. For a main house the mediterrânica is usually the better choice, certainly in windy areas such as around Covilhã.
The leak is rarely where you see it
Water runs along the purlins and enters metres away. Sealing the stain on the ceiling fixes nothing. Always have the path of the water assessed, not just the point where it appears. And do not put replacement off until after the winter: wet timber gets more expensive every month.
Where I can help
Once the roof is sound, my work starts: the ceiling and loft finishing inside, plastering, painting and repairing damp damage on the inside. I carry that out personally.
For the roof itself I will point you to a roofer. You will find tradesmen in this region through LocalTrades.
Service area
I work out of Fundão in Covilhã, Castelo Branco, Belmonte, Penamacor and Idanha-a-Nova. Registered as a sole trader (trabalhador independente) in Portugal, NIF 309729211.
Why Gerardus Koetje?
- Dutch, English & Portuguese
- Registered as a sole trader (trabalhador independente) in Portugal — NIF 309729211
- Years of experience in Central Portugal
- Honest and transparent — no surprises
Service area
- Fundão
- Covilhã
- Castelo Branco
- Belmonte
- Penamacor
- Idanha-a-Nova
- Sertã
- Oleiros
- Guarda
- Sabugal