Advice worth reading before you ring

Will spray foam insulation stop me getting a mortgage?

Problems · 2 Nov 2026

Why lenders and surveyors worry about spray foam in a loft, when it really needs to come out, and how to remove it so a surveyor can sign the roof off.

Read it →

Does a new roof need Building Control approval?

Advice · 2 Nov 2026

When a re-roof needs Building Regulations approval, why the insulation rules matter, and why the certificate matters when you sell.

Read it →

How do I know if my roof felt has failed?

Problems · 2 Nov 2026

The signs in your loft and on your ceilings that the felt under your tiles has given up, and when a local repair will do.

Read it →

Should I jet-wash the moss off my roof?

Advice · 2 Nov 2026

Why jet washing damages roofs, what the roofing trade body says, and how moss should come off instead.

Read it →

Dry ridge or mortar ridge: which is better?

Advice · 2 Nov 2026

Why ridge mortar cracks, what the British Standard now expects, and when mortar is still the right call.

Read it →

What does a roof MOT check?

Advice · 2 Nov 2026

What a proper roof check covers, inside and out, how often to have one, and why it matters if you ever claim on your insurance.

Read it →

Can cavity wall insulation cause damp?

Problems · 2 Nov 2026

When cavity insulation is to blame for damp, when something else is, and what to do if your insulation has a guarantee.

Read it →

Felt, GRP or EPDM: which flat roof is best?

Advice · 2 Nov 2026

The three main flat roof coverings compared honestly, with the price ranges Which? gathered from roofers.

Read it →

My roof is leaking in heavy rain. What should I do?

Problems · 2 Nov 2026

What to do in the first hour, how to protect an insurance claim, and how we find a leak that only shows up in heavy rain.

Read it →