Flat Roof leaking? Fix it once.
Specialist GRP fibreglass flat roofing installed across Lincolnshire and surrounding areas — proven to last for decades, not years.
✔ 20+ years experience
✔ Fully insured
✔ Specialist GRP installers
✔ Seamless GRP systems
No patches. No temporary fixes. No repeat leaks.
From leaking felt to a seamless GRP roof that lasts decades.
Before
Old felt roof failing — leaking at seams and weak points. Temporary fixes no longer working.
After
Replaced with a seamless GRP system — no joints, no weak points, built to last decades without repeat leaks.
Why a GRP roof — and why it’s done properly matters
Seamless = no weak points
No joints, no overlaps, no common failure areas. One solid, watertight surface.
Built to last decades
Most flat roofs fail within 5–10 years. A properly installed GRP roof lasts 20–40.
No patch jobs or temporary fixes
We don’t “repair and hope”. We replace the problem with a permanent solution.
If you’re tired of fixing the same roof over and over, it’s time to do it properly.
If your roof is already leaking, don’t wait — it only gets worse.
Local Homeowners Trust Harker, Here’s Why.
⭐ ⭐ ⭐ ⭐ ⭐
“Amazing job on my roof. The team worked hard, kept everything clean and tidy, and you wouldn’t have known they were there. Brilliant result — highly recommended.”
— Amanda Lunn⭐ ⭐ ⭐ ⭐ ⭐
“Extremely punctual, polite and professional. The work was completed efficiently and everything was left spotless. Couldn’t recommend Sab & his team enough.”
— Warren Hines⭐ ⭐ ⭐ ⭐ ⭐
“We had our summerhouse roof replaced and the quality is excellent. No leaks and a great finish. Would 100% recommend for any roofing work.”
— Lauren Chester Specialist Flat Roofing Services
New Flat Roof Installations
For new builds, extensions, garage conversions, and development projects.
Flat Roof Replacements
For new builds, extensions, garage conversions, and development projects.
GRP Roofing
Durable seamless fibreglass roofing systems built to last for decades.
Stop dealing with the same leak every year.
Get it fixed properly with Harker.
✔ 20+ years experience
✔GRP specialists
✔ Fully insured
✔ Work guaranteed
We only take on a limited number of jobs each week — get in touch early to secure a slot.
Get your free quote
Call us now for the fastest response, otherwise fill in the form below, we usually reply the same day.
✔️ Trusted since 2005
✔️ Free no obligation quotes
