How Much Does Flat Roof Replacement Cost?
As a company that sells flat roof materials like EPDM and installation tools, who better to reveal the costs of a flat roof replacement than us, and who deals with flat roof replacements daily?
So, seeing that the cost is mostly dependent on the size of your roof and project or the type of flat roof material you choose, we thought we’d help you understand the question and break down the costs involved with either repairing or replacing your flat roof.
From cost examples to the best types of flat roofing systems, we’ll cover every base so you know how much to budget. If you plan to replace your flat roof with EPDM, use our online calculator to calculate the costs.
Factors that affect your flat roof cost
When estimating the price of your flat roof, you’ll need to consider factors like coverings, materials, equipment, labour, and more.
Costs depend on:
- The flat roofing materials and system you choose
- How accessible your roof is to reach
- The area size of your flat roof (in M2)
- Where in the UK your project is taking place (some areas are more expensive)
- The roofing company you choose to install, or whether you plan on DIY
- The removal of your old flat roof cost, and the disposal of materials and waste
The most cost-effective flat roof replacement cost
Many roofing companies across the UK choose single-ply because of its flexibility, durability, low maintenance needs, and overall price.
Single-ply membranes like EPDM are great for all applications and projects, from new builds to extensions to garages and sheds.
Flexible PVC sheets are manufactured from mainly synthetic polymers, making them seamless and waterproof. They are also easy to install as they are laid down in sheets.
Costs, though, can depend on whether they are applied warm or cold. On average, they cost from £60 per m2.
Take a look at our shop for one-piece EPDM membranes, which cost £9.49 per sqm.
Is it cheaper to repair?
It’s practically impossible to give accurate figures without seeing your roof or knowing its measurements. Sometimes, you might require a roof repair rather than a flat roof replacement. Typical roof repairs are necessary when there’s a leak, internal damage, water pooling, etc, but if you’ve ignored these problems for too long or they keep recurring, it might just be time for a replacement. Depending on the scale of your problem, a flat roof repair can cost from £150 to £1,000.
Replacing a flat roof with felt cost
The cost of a felt flat roof replacement will depend on the roof size. Often, roofers recommend against using felt for larger roof areas and instead recommend a single-ply system. A felt roof costs from £1,200 to £12,000, so it’s important to get several quotes first. On average, the cost of felt per m2 is around £80-120.
Liquid flat roof replacement cost
Liquid systems are typically cold-applied, waterproof, and feature seamless fittings. They are typically used on balconies, walkways, high-trafficked areas, roof terraces, and extensions. On average, costs per m2 are between £100 and £150, making it one of the most expensive flat roof replacement options.
Green roof replacement cost
Green roofs are eco-friendly living systems that blend nature with manmade structures. They can improve the aesthetics of your property and its thermal and acoustic performance.
However, as there are many green roof options, it can be hard to set an exact price. However, you can expect the cost per m2 to range from £80 to £140.
Again, this will entirely depend on the roof size, specifications, and the type and amount of vegetation.
