600g Kit – With Tools
Used for this product group. View the category to choose the right products and compatible options.
Heavy Duty Fibreglass Roof Kits
600g GRP Roofing Kits for Heavy Duty Flat Roofs
Shop heavy-duty 600g GRP roofing kits for larger flat roofs, stronger laminates, walkways, commercial projects and more demanding applications.
Heavier-duty laminate
600g produces a thicker, stronger laminate for larger roofs and more demanding applications.
600g Kit – Without Tools
Used for this product group. View the category to choose the right products and compatible options.
Showing all 5 resultsSorted by price: low to high
-
Sale!
600g GRP Fibreglass Flat Roof Kit – Heavy Duty Flat Roof System (various Sizes)
Price range: £97.49 through £404.99Select options This product has multiple variants. The options may be chosen on the product page -
Sale!
600g GRP Fibreglass Flat Roof Kit – Heavy Duty Flat Roof System with tools
Price range: £143.33 through £450.83Select options This product has multiple variants. The options may be chosen on the product page -
Sale!
GRP 600g Commercial Roofing Kit – 50m² Heavy Duty System
Original price was: £696.66.£627.49Current price is: £627.49. ex VAT£752.99 inc VAT£12.55 / m²Add to cart -
Sale!
GRP 600g Commercial Roofing Kit – 60m² Heavy Duty Trade System
Original price was: £865.83.£779.99Current price is: £779.99. ex VAT£935.99 inc VAT£13.00 / m²Add to cart -
Sale!
GRP 600g Commercial Roofing Kit – 100m² Heavy Duty Trade System
Original price was: £1,166.66.£1,049.99Current price is: £1,049.99. ex VAT£1,259.99 inc VAT£10.50 / m²Add to cart
Quick category guideQuick guide to 600g GRP Roofing Kits for Heavy Duty Roofs
This category is for installing a 600g heavy-duty GRP fibreglass roof over a suitable OSB3 or timber deck. Use it to check the product type, surface compatibility, preparation work and related CRS options before ordering.
Choosing guide
Need help choosing?
Use these quick checks to make sure this category suits the job before ordering.
What is this category for?
Choose 600g GRP Roofing Kits for Heavy Duty Roofs for installing a 600g heavy-duty GRP fibreglass roof over a suitable OSB3 or timber deck.
Good choice when
- Use this category for installing a 600g heavy-duty GRP fibreglass roof over a suitable OSB3 or timber deck.
- Use it when the surface is new OSB3 or suitable timber roof deck.
- Use it when the measurements, preparation work and related accessories have been checked.
Not the right choice if
- Do not use this category when the existing roof only needs a quick repair, coating or overlay rather than a new GRP system.
- Do not use it when the roof is unsafe or unsuitable without preparation.
- Do not use it as a shortcut if another CRS system is a better fit.
Next step
Choose the kit weight, check the roof size, then add the correct trims and tools before ordering.
Also useful for
- 600g GRP Roofing Kits for Heavy Duty Roofs
- GRP fibreglass roofing - 600g heavy-duty
- New flat roof
- GRP roofing kit
- fibreglass roof kit
- flat roof kit
- OSB3 roof deck
Related pages
600gMat weight
20+yrsLifespan
4.6★1,300+ reviews
UKStock
Heavier-duty laminate
600g produces a thicker, stronger laminate for larger roofs and more demanding applications.
When Should I Use A 600g GRP Roofing Kit?
600g GRP roofing kits are designed for stronger laminates and more demanding flat roof projects. They are often chosen for larger roofs, commercial work, heavier-duty applications and roofs where extra strength is preferred.
Best For Larger Roofs
A stronger laminate option for larger flat roofs and more demanding roof areas.
Heavy Duty Use
Useful where the roof may need a tougher GRP laminate than a standard domestic system.
Standard Domestic?
For garages and extensions, a 450g GRP roofing kit is usually the standard choice.
Need Fire Rated?
For building control or fire performance requirements, consider fire-rated GRP systems.
Why CRS
600g laminate — thicker and stronger than standard 450g
For larger roofs, higher-traffic surfaces and commercial applications
Includes resin, 600g chopped strand mat, catalyst and topcoat
Tool packs available alongside the kit
T&G OSB3 deck and Prymax primer required before laminating
Not needed for standard domestic garages — 450g is sufficient
Not right if
Existing roof needing repair or overlay — not a new deck
Rotten or structurally failed deck — replace deck first
What is a 600g GRP roofing kit best for?
600g GRP roofing kits are best for larger flat roofs, stronger laminates, commercial work and more demanding applications.
Is 600g GRP stronger than 450g?
Yes. A 600g GRP system uses heavier fibreglass matting and creates a stronger laminate than a 450g system.
Can I use 600g GRP on a domestic roof?
Yes, but it is usually selected where extra strength is needed. For most normal garages and extensions, 450g is commonly used.
What does a 600g GRP kit include?
Most 600g kits include roofing resin, 600g fibreglass matting, catalyst and topcoat, with tool options available on selected kits.
Should I choose fire-rated instead of 600g?
Choose fire-rated GRP where building control, fire performance or project specification requires an upgraded fire-rated system.
600g GRP Roofing Kits For Stronger Flat Roof Systems
600g GRP roofing kits are heavy-duty fibreglass roofing kits designed for flat roofing projects where a stronger laminate is required. They are commonly chosen for larger roofs, demanding applications and projects where extra strength is preferred.
Each 600g kit includes the core materials needed for a fibreglass flat roof system, including resin, 600g fibreglass matting, catalyst and topcoat. Depending on the roof design, trims, bandage tape and tools may also be required.
600g vs 450g GRP Roofing Kits
450g is usually the standard domestic option for garages and extensions. 600g is the stronger choice for larger roofs, heavier-duty use or applications where a tougher laminate is needed.