Fitting A Slate Roof

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Fitting a slate roof. Install ridge slates and flashings in the same manner as installing slate hips except ridge joints should be caulked. Position the first roll of underlayment at one side of the roof perpendicular to the lower edge the eave of the roof. The stone is dug or quarried from the earth brought to the surface then hand split with a hammer and chisel into thin sheets about a quarter of an inch thick. Set out the first second and all the rest of slates on a pitched roof.

The supplier of the slates should recommend the spacing up the roof between the battens known as the gauge this usually varies according to the size of the slates the pitch of the roof and the degree of exposure. This step by step video guide by velux shows how to install a velux new generation roof window in a slate roof at standard installation height. These slate shingles are then trimmed into particular shapes usually punched for nail holes and are then ready to be installed on a roof. You will need longer nails when installing ridge slates over vent material.

In this case 2 5 inch copper roofing nails were used. 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. This is a video showing the fitting of a velux roof window with instructions. Nail the vent material to the furring strips.

When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps. The gauge is in fact the same as the margin which is the length of the slate exposed.