Posted on 23 February 2022

Are you in the process of choosing roofing for your home, garage, extension, or commercial property? If so, you may be wondering “What is a flat roof?”. Flat roofs are a popular option for a variety of buildings due to their cost-effectiveness and energy efficiency. At Raven Roofing and Repairs, we specialise in flat roofing in Grimsby and Louth, providing a professional and reliable service to our customers throughout the area. Read on to find out more about flat roofs. 

An overview of flat roofs 

What is a flat roof?

Flat roofs are those which are almost level. However, whilst they are described as ‘flat’, most of these roofs are actually slightly sloped to allow rainwater to run off to the side. This slope is usually around 10°, which is far lower than pitched roofs. Whilst flat roofs have long been prevalent in countries with warmer climates, they only really became common in the UK after World War Two. Often adopted due to their low construction costs, they are viewed as a cheaper alternative to standard pitched roofs. 

What are the benefits of flat roofs?

Now that you know what is a flat roof, you might be wondering what the benefits are of getting one. Here are just a few advantages of choosing a flat roof for your property: 

  • Lower cost. Since flat roofs take up less space, they consequently use much less material than pitched roofs. This not only makes the initial construction cheaper but also provides significant savings if repairs are necessary. If you’re looking for a cost-effective roofing system for your home or commercial property, a flat roof could be the ideal solution.
  • Versatility. Flat roofs are more versatile than pitched roofs, allowing for a variety of uses. Some people choose to turn their flat roofs into attractive rooftop gardens. They can give you additional outside space for relaxing, dining or entertaining all year round.
  • Energy-efficiency. In many cases, a flat roof is far more energy-efficient than a pitched roof. Whilst the latter traps unwanted warm air or lets cooled air to escape, a flat roof has less overhead space for the air to stagnate. Flat roofs use innovative insulation methods and use newer materials that lower the overall heating and cooling demand.

How are flat roofs constructed? 

Flat Roofing in Grimsby

There are significant differences between constructing flat roofs and pitched roofs. Firstly, we lay joists across the two vertical items, which is usually the walls of the building. Steel joists are common since they offer more stability. They are usually installed in one if not both walls. There’s normally approximately 400mm between the joists, however, the distance largely depends on the size of the roof as well as the type of material. The amount of pressure on top should be minimal. 

Once the joists are in place, we use plywood decking to cover them. The distance between them is again determined by how much weight will be placed upon them. Achieving the correct balance is vital since too much weight will result in an unable roof. We’ll build a frame into the roof to create a small slope for draining away rainwater. 

The decking and joists are fitted together using tongue and groove fitting. This enhances the strength and stability of the roofing structure. The integrity of the material is also increased, allowing it to withstand the effects of the elements over time. The boards are waterproofed using an extra layer of material. This is usually EPDM rubber, although other options are available. A sealant is added to protect the interior of the building. 

Can I install a flat roof myself? 

Whilst it’s possible to install a flat roof yourself, most people enlist the services of a professional roofing company. Even if you pride yourself on your DIY skills, flat roof installation is a specialist job and usually requires the services of experienced roofers. Many people contact Raven Roofing and Repairs when they need a flat roof installed to the highest possible standards. We specialise in flat roofing in Grimsby and Louth, with our team installing hundreds of these structures over the years.  

How to maintain a flat roof

If you do decide to install a flat roof on your property, it’s important to perform regular maintenance checks to ensure that there are no minor problems that could develop into bigger issues over time. This will maximise the lifespan of your roof and help you to avoid costly bills. Scheduling six-monthly checks is a good idea for keeping a flat roof in good condition. You can then fix any problems promptly before they become more serious. 

We also recommend regularly removing debris from your flat roof. This includes leaves, twigs, dirt, mould, and algae. Whilst it will always collect on a roof at any time of the year, you shouldn’t let it build up. Doing so could block your gutters and even lead to water pooling on top of the roof, which can lead to a myriad of more serious problems. If your property is close to trees, try to trim them as much as possible. This will help to avoid debris falling down onto the roof and ensure that you need to remove this build-up less regularly. 

Contact us 

If you’re still not sure what is a flat roof or you’d like to discuss your flat roofing requirements with one of our experienced roofers, don’t hesitate to get in touch. You can reach us on 01472 565 084 (Grimsby) or 01507 640 072 (Louth), or alternatively, send us a message via our website. We’ll aim to get back to you with the answers to your questions as soon as we can. We can provide you with a free, no-obligation quote for the roofing services you require.


Customer Reviews
Raven Roofing & Repairs Ltd
Based on 39 reviews
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Shawn Bosworth
Chris and his apprentice were brilliant! Came out in the miserable rain and made my roof water tight again. I had several quotes from other roofers, cowboys trying to milk my desperation for silly money. Chris was honest, fair and reasonably priced. Highly recommended, thanks!
mark appleby
Extremely Happy with Job!Chris, Quickly assessed the roof and gave options on what could be done.Once Date Agreed, delivered on time with a very professional looking job. Job was in Feb and Chris and Team went out of their way to get the job done even though weather was bad at end of week. They left Work area very clean. Highly reccomend them!
Bev Barley
Thanks for doing a first class job would highly recommend Chris for a job well done
Robert Meadows
Mike Downs
Fantastic, would recommend to anyone who needs roof work. Polite, helpful and super fast. Thanks so much.
Lisa McMahon
Had a leak from my roof. Chris came out the same day althoughthe weather wasn't good. He surveyed the roof and found the problem immediately (a tile had slipped), took photo's before and after replacing the slipped tile. I asked how much I owed him - he said there was NO charge as it was a quick repair. What a lovely, kind, genuine guy! Would highly recommended him and his company.
Roland Packer
We recently had the roof on our extension replaced by raven roofing. Chris and his young helper couldn't have been more helpful. Work done to a very high standard. Quote honoured to the penny. Genuinely nice people and a real pleasure to do business with. Will definitely call them for the services they offer, when needed.
Michelle Packer
Can’t recommend this company enough. Did a great job on our roof , very friendly team , punctual, good quality work and good value for money . Many thanks
Carol Howden
Very friendly team and carried out a great job. Arrived and just got on with the job. Looks great
andrew engeham
Competitive price and excellent workmanship.Highly recommended.
Keith Brown
Great company great service
John Hornsby
Came on time very Satisfied with wat was done. Will be using them again if needed
Omer Khalifa
renegade jokerrr
Fantastic service! Nice and friendly guys! Very quick work! Great customer service! If I need any repairs in the future i will use Raven again.
Margaret Dabb
After being let down by another firm i rang Chris in desperation. Within an hour he arrived, looked at work, discussed, priced and booked a date. Arrived on time, everything ran like clockwork even in the awful heat they had to work through. Very well organised, very tidy, would have no hesitation in recommending his work. Many thanks
Zoe Gibbons
Can’t recommend Chris and his team more, they were all friendly, polite and efficient and left my patio tidier than it was before! Nothing was too much trouble and good quality work and price. I’d definitely recommend Raven Roofing to all my friends and family.
Alan Grosschmidt
Would Recommend Raven Roofing.We had new gutters and facias fitted all round the house.We were really pleased with the completed job.I did point out a minor oversight, which Chris promptly dealt with.The quote for the job was very competitive and I doubt you could get it done cheaper.So deserves 5 Stars.
Andrea Goforth
Was very happy with the prompt, professional, and friendly service provided by this company . They were so quick to help me out and repair a badly storm damaged roof. It is such a joy to have a service provider come when they say they will! Reasonable price and good quality workmanship too . Thank you, Raven Roofing .
We had the tiles down the gulley re-bedded.Very professional and cleaned up afterwards. Really friendly and very kind guy and we will definitely be using Raven Roofing again in the new year to do our guttering! Thanks Chris 👍🏻
Mike Prior
they repaired a dislodged tile free of charge. Just asked To be remembered for other works and telling my friends
Sally Melton
Had a skylight fitted. Excellent service, fitted my job in even though extremely busy. Was absolutely delighted the attention to detail was perfect. Made sure everything was tidied up and taken away. Thank you again. Would highly recommend.
Ali Wickham
Peter Hogarth
These guys did a great job repointing my roof gulleys
Pamela Blow
Samantha Blow
Excellent service, I would highly recommend :)
Derek Coates
Chris promptly repaired the front guttering which is now ok.
Lee Popham
Rang raven to come and fix my roof after last months storm, came next day and repaired, very happy with service and price, will definitely use again.
Mark Barnard
Very good reliable service all work guaranteed
kevin langley
When we needed urgent roof repairs, Raven Roofing & Repairs came to the rescue. Great quality work undertaken by true professionals.
Steve Nowell
I recently had repairs done to my roof. The response and service were excellent, nothing was too much trouble and the work carried out effectively and efficiently
Kelly Brewer
Excellent service, recently had repairs carried out on my house roof, Chris was really friendly, work carried out to a great standard at a great price 🙂
We have used Raven Roofing several times for small repairs as we didn't want to go to the expense of a new roof, but recent torrential rain forced us to accept we needed a new roof. We were dreading the bill but Raven Roofing were very reasonable (not sure if I'm allowed to say how much).The scaffolding arrived and was put up promptly, Raven Roofing arriving a couple of days later to start work, the only delays were due to bad weather and Raven Roofing contacted us to let us know about any delays which we really liked, usually builders don't bother. Raven roofing were polite, friendly and courteous at all times.Out roof was completely stripped and replaced in a week, all rubbish was removed and the gardens left looking tidy.The roof itself looks fantastic...we are very very pleased and highly recommend Raven Roofing.