Pitched Slate Roof Construction Detail

One of the areas of a pitched roof most prone to leakage if not constructed properly is the valley.

Pitched slate roof construction detail. The slate coverage per m2 can be found from table 2 23 9. Clay and concrete tiles have retaining nibs on the back of the tile which rest on the wooden lath slates which are essentially sheet materials have holes drilled in them and then nails are hammered though the holes into the wooden lath. The minimum pitching or sloping degree for the roof is decided by the minimum slope necessary for excluding the roof covering and drain rainwater to eaves or valley gutter. When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps.

Weight of slates kg area of roof m 2 slate coverage 1000 therefore the total weight. It is an area where water is directed towards rather than away from therefore correct detailing and construction is essential. What roof pitch do i need for what slate size. This can be determined by the size of the timbers or the size of the roof.

Pitched roof detail the way that the tile is held on the roof differs slightly according to the material used. One pitched roof construction method is a cut roof method. This is more of a traditional manner in regards to cutting the timber while onsite and building up the roof by the use of rafters ridge boards joists and purlins among others. A common misconception is that the mortar bedding is there to prevent water access.

Generally speaking 20 degrees is the lowest advisable pitch for a slate roof depending on the size of the slates and how much that the roof is exposed to moderate weather conditions. Construction details of pitched roof.