MANMADE COMPOSITE SLATE AND FLAT ROOF, ESHER

This job was for one of our regular builders, it was a new build 4 bedroom property.

We installed a 20mm over facia vent to allow air flow into the loft space to prevent condensation ‘sweating’. We then felt and battened the existing roof and extension using a high-performance breathable membrane and dried blue treated battens. These are fixed with 63mm ring shanked batten nails.

We layed the slates using 38mm copper nails and copper disk rivets (each slate is fixed with 3 points). The nails are to hold the slate in position and the disc rivets is fixed at the bottom to prevent the slate from blowing up in high winds.

We also installed a dry ridge system, these are mechanically fixed with 100mm screws (which again aids against high winds) it acts in situe with the over facia vent to allow cross flow through your roof to stop condensation and allow the roof to breath. The dry ridge also works alongside the over facia vent to create a cross ventilation.

One of the great attributes is it is a low maintenance system.

With regards to the flat roof we used a 3 layer high performance torch on felt system. The first layer is tacked down with 25mm tacks, we then have a 3mm second layer which is touched on with a gas gun. The final layer is a top capping sheet in slate grey mineral finish.