The Flat Roofing Specialists You Can Rely On.
Reliable, high-quality flat roofing across Lincolnshire and beyond.
Why Choose Harker?
20+ Years Expertise – Thousands of roofs installed across the UK.
No Leaks 20 year Guarantee – Our systems are proven to last decades.
Premium Materials – Only the highest-quality resins, mattings, and trims.
Trusted by Homeowners – 5-star reviews and repeat customers year after year.
What Our Clients Say
“Amazing job on my roof. The lads was hard working, despite it being hot and sticky they was always polite and courteous ..but what i found was how clean and tidy they kept the work space and garden, after finishing they tidied around despite it being fairly late in the evening, wouldn't of known they was around. .can not recommend these enough.. thank you for the hard work guys you did a brilliant job.”
— Amanda Lunn“I cannot recommend Sab & his team enough! Extremely punctual, polite, professional & clean! They work extremely efficiently & was mopped up in no time time leaving a great job behind!!!! These are the lads you want!”
— Warren Hines“We've just had our summerhouse roof replaced with Sab and his team, absolutely amazing service and great quality. We now have a leak free roof and can look forward to summer evenings in our summerhouse. I would 100% recommend these guys for any roof work you need doing.”
— Lauren Chester 
“Very impressed from initial contact, right through to installation. Great quote, great communication, no hassle, and an awesome end result! Would 100% recommend you guys to anyone”
— A GOODWIN
“ Seb put a balcony and upstand on for me 16 years ago, and it still looks brand new, and not one issue with it. I can highly recommend”
— J BONNELL