Commercial and Industrial Roof Inspections in Portugal: Leaks, Flat Roofs and What to Check
By Manuel R.2 min read
A leak in a warehouse, factory or shop costs more than the repair: stock, downtime and arguments about who pays. Most start in the same few places.
Where commercial roofs fail
- Membranes and seams: splits, blisters and open laps on flat roofs
- Drains and outlets: blocked or set at the wrong level, so water stays on the roof
- Penetrations: plant, ducts, vents and cables passing through the roof
- Flashings and parapets: where the roof meets a wall
- Skylights and roof lights: seals and frames
- Metal and fibre-cement sheeting: corroded fixings and cracked sheets
- Solar panel fixings: holes in the roof surface
Why ponding water matters
Water that does not leave a flat roof adds weight, speeds up the ageing of the membrane and finds any weak point. Standing water after rain is often the first sign of a drainage problem, and it is easy to see from above.
How often to inspect
At least once a year and after every serious storm. Also at key moments: before buying or leasing a building, at the end of a lease, and before renewing insurance. Keeping dated images lets you compare condition from one visit to the next.
Why use a drone on a large roof
- Safety: nobody walks on a large, fragile surface
- Speed: the whole roof in one visit
- Coverage: every area, not a sample
- Evidence: dated, located images for insurers, owners and tenants
- No disruption: the business keeps working
At Oporto Home Inspections we inspect homes across Porto, Vila Nova de Gaia and the North for buyers who want the truth about a property, not the sales version. Inspect with confidence.