Collection: GRP Trims and Corners

GRP Fibreglass Roof Trims & Corner Pieces — Professional Flat Roofing Edging

Complete your GRP flat roof with a clean, weatherproof finish using our full range of heavy-duty fibreglass roof trims and corner pieces. Manufactured from premium 600gsm glass reinforced plastic (GRP), every trim in this collection is built to last — resistant to UV, corrosion, rot, and the harshest UK weather conditions.

Whether you're finishing a garage roof, house extension, dormer, balcony, or walkway, our GRP trims deliver the professional edge detail that makes the difference between a good job and a great one.

What's Included in This Collection

• Drip Edge Trims (A170, A200, A250) — Available in small (65mm), medium (90mm), and large (140mm) drop depths. Directs water run-off cleanly into gutters. Supplied in 3m lengths.
• Raised Edge Trims (B230, B260, B300) — 35mm upstand raised edge trims to retain the GRP membrane at roof perimeters. Matched to drip trim sizes for a consistent system.
• External & Internal Corner Pieces (C1, C4, A170 Corner/Closure) — Pre-formed GRP corners eliminate mitre cuts and deliver watertight, professional junctions every time.
• Simulated Lead Flashing Trims (C100, C150, C7) — GRP alternatives to traditional lead flashing for abutment details, step flashings, and cover flashings.
• Wall Fillet, Expansion Joint & Drainage Trims (D260, E280, G180) — Specialist trims for internal angles, thermal movement, and controlled drainage.
• AT195 Trim Flanges — High-adhesion outer face for step details and cover flashings, available in 85mm and 105mm flange widths.

Why Choose Apex GRP Trims?

• Heavy-duty 600gsm GRP construction — the same specification used by professional roofing contractors
• UV-stable and weatherproof — no warping, rusting, or rotting
• Fully compatible with all Apex GRP roofing kits and membranes
• Pre-formed corners eliminate the need for mitre cuts — saving time and reducing waste
• Supplied in standard 3m lengths (orders of 3 or fewer cut to 1.5m for easier delivery)

All trims are designed to work together as a complete system, ensuring compatibility across drip trims, raised edges, corners, and flashings. If you're unsure which trims you need for your project, our team is on hand to help.