Flat Roofing Dorset — GRP, EPDM & Felt Roofing You Can Rely On
Four generations of the same family working in roofing. KNJ Roofing installs, repairs and maintains flat roofs across Wimborne, Poole, Bournemouth and the surrounding Dorset area — with free quotes and a full workmanship guarantee.
Flat Roofing Services Across Dorset
From full new installations to a quick repair on a leaking shed roof, we work with all the main flat roofing systems.
GRP Fibreglass Roofing
A seamless, glass-reinforced-plastic flat roof system built for long-term, low-maintenance waterproofing.
Learn more →EPDM Rubber Roofing
A single-ply rubber membrane roof system known for flexibility and a long service life.
Learn more →Felt Roofing
Modern high-performance felt and torch-on systems for cost-effective flat roof waterproofing.
Learn more →Flat Roof Installation & Replacement
New flat roofs and full replacements for extensions, garages, dormers and commercial buildings.
Learn more →Flat Roof Repairs
Fast, reliable repairs for leaks, splits, blisters and ponding water on any flat roof.
Learn more →Flat Roof Maintenance
Scheduled inspections and upkeep to catch small issues before they become expensive ones.
Learn more →A Family Roofing Business, Four Generations Deep
KNJ Roofing is a Dorset-based roofing company built on hands-on experience passed down through the family. We specialise in flat roofing — GRP fibreglass, EPDM rubber and felt systems — for homeowners, landlords and commercial premises across Wimborne, Poole, Bournemouth and the wider Dorset area.
We take the time to explain your options properly, whether that's a full replacement or a targeted repair, so you can make a decision you're comfortable with. Every job is backed by a full workmanship guarantee.
What Our Customers Say
“Booked KNJ for a full slate pitched roof replacement and the whole job was finished to a high standard, on schedule and for the price we were quoted.”
“The team were friendly and professional throughout, and we're really pleased with the finished result.”
“Called KNJ out for a leaking felt roof on our shed. They kept us updated at every stage, left the garden spotless, and we wouldn't hesitate to use them again.”
Areas We Cover in Dorset
We carry out flat roofing work throughout Wimborne, Poole, Bournemouth and the surrounding towns and villages.
Flat Roofing Questions, Answered
How long does a flat roof usually last?
It depends on the system. Felt roofs typically last 10-15 years, GRP fibreglass roofs 20-30 years, and EPDM rubber roofs can last 30 years or more when installed correctly and looked after.
Do you offer free quotes?
Yes - we offer free, no-obligation site visits and quotations on all flat roofing work, from small repairs through to full installations.
How do I know if my flat roof needs repairing or replacing?
If the membrane is cracked, blistering, or has reached the end of its expected lifespan, replacement is usually the better long-term option. Smaller, isolated issues like a split seam or a blocked outlet can often be repaired. We'll always give you an honest recommendation rather than pushing for a full replacement unnecessarily.
Do you carry out both domestic and commercial flat roofing work?
Yes, we work on flat roofs for homes, extensions, garages and outbuildings as well as commercial and industrial buildings across Dorset.
What areas of Dorset do you cover?
We cover Wimborne, Poole, Bournemouth and the surrounding areas - see our full coverage area list for the towns we work in.
Get a Free Flat Roofing Quote Today
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