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Estimating Asbestos Roofing |
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Saturday, 12 April 2008 09:10 |
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Unlike galvanized iron roofing sheet where accessories from gutter down to the smallest anchor straps are made on site out from the standard size of plain G.I. sheet, estimating asbestos roofing material is much simpler because all the roof accessories and parts to be used such as gutter, ridge, hip and valley roll are all factory made ready for installation.
Different kinds of asbestos roofing: 1. Standard corrugated sheet 2. 4-V corrugated sheet 3. Kanaletas 4.Placa romana 5. Tencor corrugated sheet 6. Ardex lightweight corrugated sheet a. Standard ardex b. Super ardex Estimating Procedures:
- The number of corrugated asbestos roofing is determined by dividing the gutter length by the effective width covering of one sheet.
- In finding the number of flashing, gutter, ridge, hip and valley roll, divide the total length by the effective length of the accessories.
- Other parts such as ridge end cap, apron flashing, gutter corner, downspout and fittings are determined by the direct counting. They are all ready made according to factory standard sizes.
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