The roof replacement process

A new roof follows a clear sequence. Knowing the steps helps you ask the right questions and spot a roofer who's cutting corners.

1. Roof inspection

Every job should start with a proper inspection — ideally including a look inside the loft, not just from the ground. The roofer checks the covering, flashings, timbers, ventilation and any problem areas, and confirms whether you need a repair or a full replacement.

2. Getting estimates

You'll get an itemised estimate setting out the materials, labour, scaffolding, stripping and disposal, and VAT. Get more than one so you can compare like for like. An online calculator gives you a budgeting range first; the estimate turns it into a real figure.

3. Choosing a roofer

Check the roofer is properly accredited (for example NFRC membership), insured, and gives a written quote and workmanship guarantee. Don't choose on price alone — the cheapest quote often leaves something out. Our guide to choosing a roofer covers exactly what to look for.

4. Planning permission

Most like-for-like roof replacements are permitted development and need no planning permission. The main exceptions are listed buildings and homes in conservation areas, where you should check with your local authority before work starts.

5. Building regulations

A re-roof of more than a quarter of the roof area must comply with current building regulations, including insulation and structural requirements. This is signed off either through your local authority's building control or via a roofer registered with a competent-person scheme like CompetentRoofer.

6. Removing the old roof

On a full re-roof, the existing tiles or slates, battens and underlay are stripped back to the rafters. This is when any hidden timber damage comes to light and can be put right before the new roof goes on.

7. Installing the new roof

New breathable underlay and battens are fitted, then the new covering, with mechanically fixed tiles or slates to current standards, plus ridge, verge and new flashings around chimneys and abutments.

8. Scaffolding

Scaffolding is erected before work begins and is a legal requirement for a full re-roof under work-at-height rules. It's a genuine, unavoidable cost — be wary of anyone offering to do a full roof without it.

9. Waste disposal

The old roof covering, felt and battens are removed and disposed of responsibly, usually via a skip. Reputable roofers include waste disposal in the quote and clear the site properly.

10. Final inspection

Once finished, the roof is inspected and the site cleared. You should receive your workmanship guarantee, any building-control certificate or competent-person notification, and an itemised final invoice.