Today we finally moved on to the ROOFING!We started with crimping the ends of the iron at the tops,as this prevents water from getting into the house under the ridge caps.We cut the paper to,4900mm for the underlay of the iron.Our screw patterns for the top and bottom are 1 in then two gaps then one in ect.For the intermediate purlins,It was 1 in,2 spaces,1 in,3 spaces ect.Less screws are required for the middle purlins.We used chalk string lines to mark down where our screws are to be placed.I had a rattle gun with the tech screw piece.The screws are not to be fully screwed right down as the pressure can crack the rubber seals underneath the screws causing small leaks.
To get the first sheet straight,We done a 345 on the roof,marked 3 on the top purlin and 4 on the sheet of iron,Then matched it up to 5.We then tacked the sheet in place with a couple of nails.Another way of checking it for square is to have a string line up the top of the roof and one at the bottom of the roof,then you can move them around till they fit nicely between the string lines.
The other part of the class went ahead with the exterior window facing boards.We will be doing that tomorrow when we rotate.The tools we will be using are routers,chizels and many more.Primer will also be used to keep the freshly cut timber treated from the elements.
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