Roof Slate Headlap

According to an identification guide on the slate roof central website some of the hardest heartiest types are purple slate non fading green slate and grayish black buckingham slate which can.

Roof slate headlap.

Headlap is what renders the roof water tight. Headlap is what keeps the water from penetrating through the roof. Minimum headlap for fixing slates with nails or hooks the installation of a slate roof involves a number of aspects that must be considered in the design process. When the head of a slate is overlapped by the slate two courses above it that s called headlap that s the critical overlap on a slate roof figure 2.

Lap ends 6 irc 4 2 horizontal. In slate roofing water migration is controlled primarily by the angle of the roof s slope. When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps. Slates must overlap 3 inches on the side which is called sidelap and must overlap on the top which is called headlap.

When the head of a slate is overlapped by the slate two courses above it that s called headlap that s the critical overlap on a slate roof figure 2. 30 felt or comparable evaluation report required. Tile roof institute guidelines. Headlap is essen tially what renders the roof water tight.

Bs 5534 2014 is the code of practice for slating and tiling. If there is no headlap the roof will leak. Underlayments are installed on the roof deck prior to the installation of the slate roofing shingles. A slate roof can last for a century and it is one of the major reasons that people choose this material over others.

3 12 to less than 4 12. First calculate your roof pitch and then determine the inches required for sidelap and headlap. The primary aspects to be considered are. Roof slope is key in determining underlayment type and installation.

The steeper the slope the less water migration there will be. 2 to less. Type 90 mineral surfaced underlayment. Two layers 30 felt 19 overlap.

If there is no headlap the roof will leak. Headlap is what keeps the water from penetrating through the roof. It describes not only the means of installing slates nailing or hook fixings but also the headlaps or lap required to ensure that the roof remains watertight even at pitches as low as 20 degrees.