Head Lap Roofing

When i m asked to inspect a problematic new slate roof i find the side and head laps are the problems on a majority of all cases across the country.

Head lap roofing. The recommended width of step flashings will vary depending on the agency entity being referenced. Beacon building products nasdaq. Headlap is what renders the roof water tight. The side laps on the whole roof should be 6 inches.

Because of this you should start at the lowest part of the slope and work upward. Becn is one of the largest distributors of commercial and residential roofing products complementary construction and building materials serving the entire united states and six canadian provinces. If there is no headlap the roof will leak. This lap must be supported underneath by a purlin to be secure and long lasting.

Headlap is essen tially what renders the roof water tight. Bs 5534 2014 is the code of practice for slating and tiling. 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. 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.

As with side lap roofing it s good practice to use lapping tape to help create a robust weather resistant joint. If there is no headlap the roof will leak. The triple coverage portion of the top lap of strip shingles. Headlap is what keeps the water from penetrating through the roof.

3m headlap roofing granules combined in asphalt roofing shingles gives a roof extra protection against the elements of weather. The recommended length of step flashing is typically a minimum of 2 inches longer than the exposure of the roofing material. This helps to prevent water infiltration. This results in a 2 inch minimum head lap.

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. 3m headlap roofing granules are a natural mineral product with a colored ceramic coating. The triple coverage portion of the top lap of strip shingles. Side lap roofing end lap joints for end lap joints a minimum sheet over sheet overlap of 250mm should be allowed for where the sheets lap.

How to lap metal roofing a basic rule of thumb for installing metal roofing is that the piece of roofing higher up on the slope should always overlap the one below it. Shortest distance from the butt edge of an overlapping shingle to the upper edge of a shingle in the second course below.