Thrutone fibre cement slate roof refers to roofing materials made of slate. Slate is a type of rock that is cut into smaller tiles and used for interior and exterior applications, including roofing. When you are installing a Thrutone fibre cement slate roof, the first necessary step is fitting the roof, or taking the roof's measurements and verifying them so the proper amount of slate can be purchased for the roof.
Position a ladder on the ground and lean it up against the roof. Climb carefully up the ladder and step up onto the roof.
Run a tape measure from one end of the roof to the other along the base. Have a helper hold one end of the tape measure if there is nothing for it to latch on to. Record the measurement of the width of the roof.
Attach the tape measure to the base of the roof near the centre and run it up to the top of the roof. Record the measurement. Multiply the two together to get the total square metres for that side of the roof. Repeat the process for the other side.
Measure all smaller roofs, or any remaining areas that will be getting the Thrutone fibre cement slate, and multiply the length by the width of those measurements together. Add all the square footage measurements together to get the total square metres of the entire roof.
Divide that number by two0.185, which is the square metres of a 30 cm by 60 cm (1 by 2 foot) piece of Thrutone fibre cement slate roof, to get the number of pieces needed for installation.