Flat and low-pitched roofs

A low-pitched roof still needs an appropriate fall. The suitable pitch depends on the selected roofing system and its design provisions; there is no single figure that fits every product.

Water needs a clear route through gutters and outlets. Flashings around walls, roof penetrations and changes in level also matter. Some of these junctions may be hidden behind a parapet or impossible to see closely from the ground. The roofing manufacturer’s current installation and maintenance guidance is relevant to the actual product used.

• Has the roof leaked, and in what weather conditions?
• Are there records of roof repairs, drainage changes or gutter maintenance?
• Which roof areas were accessible during the building inspection?
• Were box gutters, outlets and concealed junctions seen closely or only from a distance?
• Does the report recommend a specialist roofing inspection before purchase?

Ask for dated photographs and repair invoices where available. Fresh paint can hide an earlier stain, while a dry day may not reproduce a leak. Neither a clean ceiling nor a dry visit confirms performance in every weather condition.

For low-pitched roofs, box gutters or inaccessible roof areas, discuss a roof plumber’s inspection alongside your pre-purchase building inspection. A specialist may need safe roof access and a separately agreed scope to assess details that a general visual inspection cannot reach.

Do not climb onto the roof to prepare for the visit. Explain the building height and available access when booking. A general building report is not a roofing design certification or a guarantee against future leaks.

Provide the roof plan and relevant details before the work is covered. Coordinate the roof-stage inspection with the builder and tell us when flashings, gutters and adjoining cladding will be complete.

If a leak is already occurring, record when it happens and any repairs attempted. A focused defect inspection can document the visible damage and help define the next investigation.