This C3 Internal Corner from Cromar is a meticulously crafted hot press moulded GRP pre-formed internal corner designed to eliminate the necessity for mitring corners of D260 wall fillet trim. This innovative solution offers exceptional convenience for a diverse array of fibreglass roofing applications.

For straightforward installation, secure the corner by nailing it to the deck at both the corner and the midpoint. Ensure a watertight seal by applying a slender line of PU sealant along the joint between the trim and the corner. Any excess sealant should be promptly wiped away for a clean finish. To reinforce the joint, use a 75mm fibreglass mat to bandage it securely.