GRC 450mm 3 Hole Crested Ridge 90 Degree  -  Grey These products are cement based materials reinforced with glass fibres. They contain portland cement, sand, glass fibres and pigment. The surface is coated with water based paint. This results in a very strong, durable and uniform product. Wet Fix Ridges Fixing Instructions Locate top course of special short slates to ensure that the required ridge cover is given. If using socketed ridge, locate and position overlapping sockets away from prevailing weather conditions. Edge bed all ridges in mortar and solid bed all ridge tile joints. Finish bedding and pointing neatly. The morta should comprise of three parts sharp sand and one part portland cement. A proprietary bonding agent mixed with cement and applied to the underside of the ridge will enhance the bond between the ridge and the mortar. Additional mechanical fixings should be used as required and in accordance with BS 5534 Part 1. 2003 and the current codes of practice. Solid bed the end of the end ridge tile. Hips - Fix where required a suitable hip iron into the base of the hip rafter. Cut the bottom hip tile to align with the eaves. Finish bedding and pointing neatly. The mortar should not be applied in cold, wet or very warm conditions.