Flat Roofing
Durable EPDM rubber, GRP fibreglass and felt flat roofing for extensions and garages.
Expert flat roofing in Hampshire & West Sussex
A well-installed flat roof is watertight, low-maintenance and long-lasting. We install and repair flat roofs on extensions, garages, dormers and outbuildings using modern, hard-wearing systems.
Depending on your project we’ll recommend EPDM rubber, GRP fibreglass or high-performance felt — each chosen for durability and value. One customer was “very happy with the work to upgrade my flat roof and with the service he provided”.
Flat roofing systems we install
EPDM Rubber Roofing
Single-ply rubber membranes with an excellent lifespan and few joints to fail.
GRP Fibreglass
Seamless fibreglass roofing that’s tough, waterproof and looks smart.
Felt Roofing
Modern torch-on felt systems for a reliable, cost-effective flat roof.
Flat Roof Repairs
Patch repairs and full recovers to stop leaks and extend your roof’s life.
Drainage & Falls
Correct falls and outlets so water drains away instead of pooling.
Extensions & Garages
Ideal for extensions, garages, porches, dormers and outbuildings.
A straightforward process from quote to completion
- 01
Free Inspection
We visit, assess the roof and diagnose exactly what’s needed — no obligation.
- 02
Clear Written Quote
You receive an honest, itemised quote with materials clearly explained.
- 03
Expert Installation
Our fully qualified team completes the work tidily, on time and to a high standard.
- 04
Clean & Sign-Off
We leave your property spotless and make sure you’re completely happy.
What customers say about our flat roofing
Genuine Google reviews from customers across Hampshire and West Sussex.
“I was recommended Altitude Roofing and was not disappointed. They were very responsive, polite, reasonably priced and professional. They did a great job on a large shed roof which had been previously done by another company twice and was still leaking! Altitude roofing secured it and did a brilliant job, I'm so pleased the shed can now be used! Thank you Altitude Roofing 😊”
“Jordan was recommended to me. I was very happy with the work to upgrade my flat roof and with the service he provided.”
Frequently asked questions
Explore our other roofing services
Roof Repairs
Fast, lasting fixes for leaks, slipped tiles, storm damage and worn flashing.
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New Roof Installation
Complete re-roofs and new roof installations built to last with quality materials.
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Slate & Tile Roofing
Expert slate and tile roofing, from single tiles to full pitched roofs in Keymer tiles.
Learn moreNeed flat roofing? Get a free quote today
Whether it’s a quick repair or a complete new roof, our fully qualified team is ready to help. Tell us about your project and we’ll be in touch fast.