If you’re thinking about fixing up or replacing a flat roof, GRP roofing kits (Glass Reinforced Plastic, also called fibreglass roofing kits) are a strong, long-lasting choice, whether you are new to roofing or already have previous experience. They’re known for their neat, seamless finish, great weather resistance, and low maintenance, and they’re becoming a go-to option for both homeowners and professional craftsmen. If you’re new to GRP, don’t worry, this guide will walk you through what’s in a kit, why people choose it, and the basics of getting started. What’s in a GRP Roofing Kit? A GRP kit is basically everything you need in one package to build a waterproof fibreglass roof. This means there is no guesswork involved and no hectic running back and forth to the shop. Most kits include: Resin – Bonds the fibreglass layers together and makes them waterproof. Fibreglass Matting – Reinforces the roof and gives it strength. Topcoat – Protects against UV rays and gives a clean finish. Catalyst (Hardener) – Gets the resin and topcoat to set properly. Trims and Flashings – Seal up the edges so water can’t sneak in. Tools – Things like rollers, brushes, mixing buckets, and gloves. Why Go for GRP Roofing Kits? They last for decades – Done right, a GRP roof can last 20–30 years with minimal fuss, which saves a substantial amount of money as well as removing the need to renew your roof periodically. No seams, no leaks – Because it’s one solid surface, water has nowhere to get in, protecting the inside of your home. Weather-proof – From heavy rain to harsh sun, GRP holds up in all conditions making it perfect for every climate and season. Low upkeep – Just keep it clean now and then, basic maintenance is all that’s really required. Beginner-friendly – With some patience and the right instructions, even first-timers can get a great result. How to Install a GRP Roof (The Basics) Every kit comes with its own instructions which can vary from kit to kit, but here’s the general idea: Prep the decking – It needs to be solid, dry, and clean. OSB3 boards are a common choice. Add the trims – This keeps water from running off the sides or seeping in. Lay the resin and matting – Mix the resin and the catalyst, roll it on, lay the matting, and then saturate it. Let it cure – Give it time to harden properly. Add the topcoat – This is your protective layer that also makes it look good. Final check – Look for bubbles, missed spots, or thin areas. Extra Tips for First-Timers Pick a dry day – You want to work on a warm, mild day, one that is ideally between 10°C and 25°C. Work in small sections – So the resin doesn’t cure before you’re ready. Protect yourself – Gloves, goggles, and a mask are a must. Measure carefully – Too much or too little catalyst can cause problems, so measure twice, work once. GRP roofing kits are a great mix of strength, style, and simplicity. If you take your time, follow the steps, and use the right gear, you can end up with a roof that looks professional and good, and will protect your home for decades. Ready to get started? Check out our GRP roofing kits and get everything you need in one easy bundle.
