Pitched Slate Roof Construction Detail

Pitched roof construction there are two basic methods of pitched roof construction.

Pitched slate roof construction detail.

One pitched roof construction method is a cut roof method. This can be determined by the size of the timbers or the size of the roof. Roof pitch 40 roof area m 2 150 length of roof slope m 9 5 the headlap can be found from table 1 by reference to slate size roof pitch and exposure 65 mm. Weight of slates kg area of roof m 2 slate coverage 1000 therefore the total weight.

What roof pitch do i need for what slate size. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. A pitched roof is a roof that slopes downwards typically in two parts at an angle from a central ridge but sometimes in one part from one edge to another.

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. Pitched roof designing buildings wiki share your construction industry knowledge. Clay or cement tiles can be used on a wide range of roof pitches. When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps.

Pitched roofs are generally provided with a pitch of about 20 degrees to the horizontal for slates and 40 to 60 degrees for tiles. For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. Construction details of pitched roof. It has two equal panels pitched at an angle meet at a ridge in the middle of a building.

4 12 to 20 12 pitches. Pitched roof detail the way that the tile is held on the roof differs slightly according to the material used. The pitch of a roof is its vertical rise divided by its horizontal span and is a measure of its steepness. 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.

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. 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. The triangle section can be left open for an open gable roof or it can be enclosed for a boxed gable roof. The total weight of slates on roof can be found from the formula.