Roof for an Extension? Get the Tie-In Done Right.
Adding an extension or loft conversion means tying a new roofline neatly into your existing roof. Tell us about your project and where your property is so we can help you get it done properly.
Part of New Roofs & Replacements

Find Roof Extensions & Alterations Help Near You
Find Roofing Help Near You
Tell us what you need and where you are. We'll help you take the next step.
Roofing Help Across the UK
From cities to rural towns — wherever your property is.
Residential & Commercial
Homes, rentals, businesses and commercial premises.
Simple, No-Obligation Enquiries
Tell us what you need with no pressure or commitment.
Roof Extensions, Alterations and Conversions
When you extend, convert or alter your home, the roof has to come with it. A new roof needs to be built for the extension or conversion, and — critically — it has to tie neatly into the existing roof so the join is weather-tight and the whole roofline looks as one.
Roof extensions and alterations are about more than just a new covering. They involve structural work, flashing and valleys where the new and old roofs meet, and often changes to the roofline — a new gable, a dormer, or a valley where there wasn't one before. Done well, it's seamless; done badly, the join leaks and the roof looks wrong.

When You Need Roof Extension Work
A new extension needing a roof to tie in
A loft conversion requiring a new roof structure
A dormer being added to create space
A roofline being altered — gable, valley or hip change
A conversion needing roof windows or a new pitch
Tying new roof work into an existing roof
What's Involved in Roof Extensions?
1. Describe the Project
Tell us about your extension, conversion or alteration and where your property is so the roof work can be planned.
2. Design the Tie-In
The new roof is designed to tie neatly into the existing roof — pitch, valleys, flashing and structure all planned.
3. Build and Tie-In
The new roof structure and covering are built and tied into the existing roof with weather-tight flashing and valleys.
4. Check and Finish
The join is checked for weather-tightness and the whole roofline is finished to look as one.
Why Get Roof Extensions Done Right?
A Seamless Join
A properly tied-in roof looks as one and stays weather-tight where the new and old roofs meet.
Protect the Existing Roof
Tying in carefully avoids disturbing or weakening the roof you already have.
Create More Space
A loft conversion or dormer roof gives you more usable, comfortable space in your home.
Add Value
A well-built extension and roof can add real value and space to your property.
Planning a Roof Extension or Conversion?
Tell us about your project and where your property is. We'll help you get the roof built and tied in properly.
Your Roofing Questions Answered
You May Also Need These Roofing Services
Roofing projects often overlap. Here are some related services you might also need.

Dormer Roofing
Dormer construction and dormer roofing for loft conversions — creating space and headroom under a pitched roof.
View Service
Roof Window Installation
Roof window installation for loft conversions and attic rooms — daylight and ventilation through pitched roofs.
View Service
New Roof Installation
Brand new roof installation for new builds, extensions and conversions — built to spec from the structure up.
View Service
Roof Flashing Repairs
Repair or replace damaged roof flashing around chimneys, valleys and junctions to keep water out at vulnerable points.
View ServiceLooking for Roof Extension Work Near You?
Tell us your town, city or postcode and what roofing work you need help with. You don't need to know the technical terms — describe it in your own words and we'll help you take the next step.
Get Local Roofing Help
Your service is already selected — just add your location.
Ready to Get Your Roof Extension Project Started?
Tell us about your extension, conversion or alteration and where your property is. Take the next step towards getting it done right.
Need help with
roof extensions