01
Two-pitch timber roof structure
High moisture risk
Telhado de duas águas. Tile-clad with timber rafters. Inspect ridge tiles, valley gutters, chimney flashings, sarking condition. Porto's annual rainfall of 1,100 to 1,300 mm loads this element more than any other.
02
Granite party walls
Settlement and damp
Paredes de meação em granito. Load-bearing, typically 40 to 60 cm thick at ground floor. Inspect for settlement cracks, rising damp without damp-proof course, and bearing of timber beam ends.
03
Timber floor beam structure
Beam-end decay
Vigas de madeira esquadriadas. 15 to 25 cm cross-section, spanning between granite party walls. Failure mode is the embedded beam end rotting in the damp granite while the visible centre looks sound. Moisture meter readings required.
04
Central staircase under skylight
Waterproofing
Caixa de escadas com clarabóia. Original ventilation and daylight core. Inspect skylight frame and waterproofing, stair structure timber condition, and intermediate landings for moisture migration from the roof.