Flat roofs can be insured — but they often come with conditions attached, and insurers treat them differently from pitched roofs. If you have a flat roof and you’re buying a property, renewing your cover, or dealing with an insurer after damage, here’s what you need to know.

Why insurers treat flat roofs differently

Flat roofs have historically been seen as higher risk by insurers. The reasons are practical:

Flat roofs rely on effective drainage and membrane or felt integrity to remain watertight — any failure can lead to water ingress quickly
Older flat roof materials (traditional felt, for example) have a limited serviceable life and deteriorate over time
Defects on a flat roof can be harder to spot without a proper inspection

Because of this, many insurers apply specific conditions to properties with flat roofs — particularly where the flat roof covers a significant proportion of the building rather than just a garage or extension.

What insurers may require

An inspection report before cover is offered or renewed

Some insurers will ask for an independent roof inspection report — particularly if the flat roof is older, if cover is being applied for on a new property, or if a previous survey has flagged concerns. The report tells them what condition the roof is currently in and what its remaining serviceable life is.

Evidence of recent maintenance or repair

Where a flat roof is ageing, an insurer may want evidence that it has been maintained or that defects have been addressed.

An inspection report following a claim

After a weather event or damage claim, an insurer may require an independent inspection before authorising repair work — to establish the extent of pre-existing deterioration versus damage caused by the specific event.

In some cases, insurers will exclude flat roof sections from cover altogether unless a satisfactory inspection report is provided.

Why the report needs to be independent

A flat roof inspection report submitted to an insurer needs to be independent — produced by someone with no financial interest in the outcome, who carries out no repair work.

A report from a roofing contractor who also does repairs carries an inherent conflict of interest. Insurers are aware of this, and an independent report from a specialist surveyor carries considerably more weight. It also protects the policyholder: an accurate, impartial assessment of the roof’s condition is useful documentation if a claim is later disputed.

What a flat roof inspection covers

A thorough flat roof inspection will assess:

The condition and type of the roof covering — felt, EPDM rubber membrane, GRP (fibreglass), or other material
Any splits, blisters, cracking, or breakdown of the surface
Upstands, abutments, and flashings where the flat roof meets walls or other structures
Outlets, drains, and drainage falls — poor drainage is a common cause of flat roof failure
Evidence of ponding water or previous water ingress
The condition of any previous repairs
An estimate of remaining serviceable life

The findings are set out in a written report with photographs, suitable for submission to an insurer.

What about flat roof extensions and garages?

Many properties have a flat roof on an extension, bay window, or garage rather than across the whole building. Insurers’ attitudes to these vary — some treat a small flat roof section as standard, others apply the same conditions as for a flat-roofed property. If an insurer is asking questions or has applied conditions, an inspection report can often resolve the matter straightforwardly.

If you need a flat roof inspection report for insurance

North West Roof Surveys carries out independent flat roof inspections across the North West of England. We produce written condition reports suitable for insurance purposes, including reports for insurers following storm or weather damage.

We carry out no repair work — our reports are impartial assessments of the roof’s condition, written for the client’s use with their insurer.

Get in touch to discuss what you need, or find out more about our flat roof insurance inspection reports and storm damage and insurance claim reports.