Pitched Slate Roof Construction Detail

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.

Pitched slate roof construction detail.

The total weight of slates on roof can be found from the formula. Pitched roofs are generally provided with a pitch of about 20 degrees to the horizontal for slates and 40 to 60 degrees for tiles. Clay or cement tiles can be used on a wide range of roof pitches. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.

It has two equal panels pitched at an angle meet at a ridge in the middle of a building. Pitched roof detail the way that the tile is held on the roof differs slightly according to the material 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. The triangle section can be left open for an open gable roof or it can be enclosed for a boxed gable roof.

4 12 to 20 12 pitches. 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. One pitched roof construction method is a cut roof method. Construction details of pitched roof.

When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps. Pitched roof construction there are two basic methods of pitched roof construction. 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. For pitches of 2 5 12 up to 4 12 the roof requires double underlayment.

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 crossed gable roof is two gable roof sections put together at a right angle. This can be determined by the size of the timbers or the size of the roof. The slate coverage per m2 can be found from table 2 23 9.

What roof pitch do i need for what slate size. Weight of slates kg area of roof m 2 slate coverage 1000 therefore the total weight. The pitch of a roof is its vertical rise divided by its horizontal span and is a measure of its steepness. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle.