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Roof pitch is the steepness of a roof expressed as a ratio of inch(es) rise per horizontal foot (or their metric equivalent), or as the angle in degrees its surface deviates from the horizontal. A flat roof has a pitch of zero in either instance; all other roofs are pitched .
The pitch of a cricket is sometimes the same as the rest of the roof, but not always. For Steep-slope roofs, it is most common to have the cricket pitch to be equal to or less than the main roof, however for low-slope or flat roofs, it is more common to see the cricket be at least 50% greater slope than the roof, to minimize ponding.
Bonnet roof: A reversed gambrel or Mansard roof with the lower portion at a lower pitch than the upper portion. Monitor roof: A roof with a monitor; 'a raised structure running part or all of the way along the ridge of a double-pitched roof, with its own roof running parallel with the main roof.' Butterfly roof (V-roof, [8] London roof [9]): A ...
Asphalt roll roofing or membrane is a roofing material commonly used for buildings that feature a low sloped roof pitch in North America. The material is based on the same materials used in asphalt shingles ; an organic felt or fiberglass mat, saturated with asphalt , and faced with granular stone aggregate.
Replacing the roofing felt on a Scout hall in Wales. Bituminous waterproofing systems are designed to protect residential and commercial buildings.Bitumen (asphalt or coal-tar pitch) is a material made up of organic liquids that are highly sticky, viscous, and waterproof. [1]
Stone slabs require a very heavyweight roof structure, but their weight makes them stormproof. An obsolete roofing material, now used commercially only for building restoration. Collyweston stone slate named after the village of Collyweston; Solar shingle; Metal shakes or shingles. Long life. High cost, suitable for roofs of 3:12 pitch or greater.
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A warm roof is a roof that is not ventilated, [9] where the insulation is placed in line with the roof pitch. [10] A hot roof is a roof designed not to have any ventilation and has enough air-impermeable insulation in contact with the sheathing to prevent condensation [11] such as when spray foam insulation is applied directly to the under-side ...