right, i have decided to use chipboard for the loft, but the measurements
have come out weird regarding the size of each board, for e.g. about 5 joist
beams have come to a length of approximately 214mm, now the diy shops only
sell boards that go from 2400mm*600*18mm
what do i do? cut it up to 3 or 4 joists beam each? or leave it as it is,
which would leave bits hanging off the end of it, therefore leaving unsafe
areas? i know that i have to screw it down leaving the end bit of the wood
to half fill a joist beam, as in normal floorboarding does
It seems that the joists always run out of pitch with the boards eventually,
even if they start in pitch.
In my limited experience of the job I've always cut the board to overlap 1/2
the joist, if the amount a waste was only small (6" or so ). If the waste is
going to be much more than this I've tended to insert a piece of 2"x1" under
what would be an otherwise unsupported butt joint. You screw the 2"x1" to
the boards either side of the unsupported junction. Yes, I know that there
is normally a board only on one side of the board you're laying but you have
to screw the remaining end of the 2"x1" when you lay the board on that side.
It's something of a nuisance, slows the job down and the ends aren't as well
supported as if they were on a joist, but it saves all that cutting and
waste of material and you would have to come down pretty hard to go through
with the joints reinforced in this way.
You'd probably get it cheaper if you bought from a builder's merchant where
you could get boards 1200 wide.
Mind you, you'd have to be able to transport them which might be a problem
if you have no trailer - and get them into the loft.
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