How to choose the right flat roofing system
- by Dina Vaisman
- July 24, 2026
- Roofing Articles
At Wonderbuilds, we have a variety of flat roofing systems available, which you can choose from depending on how many years guarantee is required, if it needs to be safe to torch, if it needs to be BROOF (t4) certified, and other various factors.
In this article, we will discuss:
- What to consider when choosing a flat roofing system
- 25-Year Flat Roofing System
- 20-Year Flat Roofing System
- 15-Year Flat Roofing System
- Liquidguard Flat Roofing System
- BROOF(T4) Certified Flat Roofing System
What to consider when choosing a flat roofing system
The following factors can be considered when choosing which flat roofing system would be most suitable:
- What kind of deck is in the system
- How easy or simple the installation process is
- How much the systems cost compared to each other
- What the system will actually look like
- The number of warranty years that are being offered
25-Year Flat Roofing Systems
At Wonderbuilds, we offer a range of 25-year flat roofing systems.
Please see below a breakdown of one of the systems available:
- Wonderbuilds Premium 5KG Capsheet
- Wonderbuilds Part-Bonded Torch-on Underlay
- Wonderbuilds Bitumen Faced PIR Insulation
- Wonderbuilds PU Insulation Adhesive
- Quick Drying Primer
- Existing Substrate
20-Year Flat Roofing System
Wonderbuilds offers a 20-year guarantee flat roofing system, with a part-bonded surface.
Please see the components below:
- Single Layer Capsheet Poly-Elast Rapid O
- Quick Drying Primer
- Existing substrate (asphalt roof/felt roof)
15-Year Flat Roofing Systems
Wonderbuilds has a range of 15-year flat roofing systems.
Please see the products that make up one of the systems:
- Wonderbuilds 5KG Capsheet
- Wonderbuilds 3KG Film Underlay/Sand Underlay
- Wonderbuilds Bitumen Faced PIR Insulation
- Wonderbuilds PU Insulation Adhesive
- Wonderbuilds VB600 Self-Adhesive VCL
- Wonderbuilds SA Primer
LiquidGuard Flat Roofing System
Wonderbuilds offers a LiquidGuard Overlay Flat Roofing System. This system is safe to torch.
Please see the roofing products that are included in this system:
- Wonderbuilds LiquidGuard
- Wonderbuilds Reinforcement Fleece
- Wonderbuilds LiquidGuard
- Existing Substrate
BROOF(t4) Flat Roofing System
Wonderbuilds offers a flat roofing system that is BROOF(t4) certified. This system is also safe to torch.
Please see the components below. Please note that the system has been BROOF(t4) certified as a whole, so the products cannot be changed for alternatives.
- Wonderbuilds BROOF (t4) Capsheet 8M
- Wonderbuilds BROOF (t4) Underlay 10M
- Wonderbuilds Bitumen Faced PIR Insulation
- Wonderbuilds PU Insulation Adhesive
- Wonderbuilds VB600 Self-Adhesive VCL
- Wonderbuilds SA Primer
Conclusion
Flat roofing systems can be used for various roofing projects. You can consider how many years guarantee is needed, the installation method, and other factors to determine which is the best choice for your roofing project.
FAQs
What kind of roofing systems do Wonderbuilds offer?
- A variety of guarantees, including 25 years and 20 years.
Does Wonderbuilds offer a BROOF (t4) certified system?
- Yes, contact us to find out more information about this roofing system at admin@wonderbuilds.co.uk.
What if I need a roofing product on its own and not the entire flat roofing system?
- Wonderbuilds offers roofing felts and accessories that you can buy separately, including capsheets and underlays.
Get in touch today
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