Finishing of leveling the floor joists & Sisalation

 Once we had finished up with leveling the flooring from yesterday, we moved on to rolling out the sisalation.  Best thing was to lay planks out on the joists that the roll of sisalation could be supported on.  A large metal pole was then put through the roll so that it could be rolled out easily.  As the weather was pretty windy today, we also had to be really careful with securing down the roll as quickly as possible so that it wasn't blown away - the paper rips very easily.  As the sisalation is rolled out over the floor joists, it neds to have a 100mm sag in the paper between the joists.  This was achieved by placing a piece of wood to this thickness onto a frame & dropping it down to get the sag (as pictured above).  Once at the right position, the sisalation was stapled down with a gun.  It is very important to keep the roll in a straight line.  We achieved this by laying out a string line with a measurement of 800mm from the joist center line (this is half the thickness of the particle board with 200mm to play with).  When laying out the sisalation, sections had to be cut out where the nogs were, so that there was some give.  It is really important when cutting the paper, it is done as accurately as possible, and any holes in the sisalation, or large gaps affects the ability of the sisalation to provide insulation.
It worked really well to have two people roll out, two to cut and staple the sisalation with the sag, and the third team to come behind to cut out squares of approximately 40 x 40mm in 300mm increments along the joist (this will be to allow the particle board to be glued down more effectively.  When the second line of sisalation is put down, the same process is used, and a new line is found to line up the roll with to keep it straight.  An overlap of the two lengths should also be created at a minimum of 100mm.