Pitched Slate Roof Construction Detail

The pitch of a roof is its vertical rise divided by its horizontal span and is a measure of its steepness.

Pitched slate roof construction detail. Effective design of a slate roof must take into account a number of inter related factors including site exposure the pitch of the roof the type of slate selected and the slate lap. Full application and sitework details are given on pages 8 to 22. It has two equal panels pitched at an angle meet at a ridge in the middle of a building. 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.

When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side. A crossed gable roof is two gable roof sections put together at a right angle. 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. 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.

Whilst you can have tiled roofs of 10 15 these are really flat roof construction with a cosmetic covering of tiles. What roof pitch do i need for what slate size. Pitched roofs are generally provided with a pitch of about 20 degrees to the horizontal for slates and 40 to 60 degrees for tiles. Introduction 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.

If your main interest is in flat roofs then you can learn more by reading flat roof construction part 4. A pitched or sloping roof has a pitch of at least 15 but often much more. Pitched roof construction there are two basic methods of pitched roof construction. Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15.

It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. Construction details of pitched roof. 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. General guidance on the most important points to be considered is given below.

Pitched roofs examples of pitched roofs. The triangle section can be left open for an open gable roof or it can be enclosed for a boxed gable roof.