I've always laid it out in the room in which it was to be used for 48 hours
before fixing so that it could expand/contract as per the temp/humidity of
Never soaked it - I would have thought that it was asking for excess
expansion and, besides that, I've always avoided getting hardboard wet
because of the degredation of the surface.
When I had a flat soe years ago,hardboard was down over the floor,soeone ust
have wetted it? as the edges were butt up against each other and them edges
were raised slightly probably due to it being wetted?
Many years ago I had a summer job with a couple of mates helping out the
headteacher of our school husband to some work in the school.
Part of this was building partition walls - and then cladding the bottom o
them in hardboard.
We did wet it and then fit it wet (looked awful!) and by the next morning
it had pulled really tight and flat...
Saying that, I didn't bother when I boarded our kitchen with it and that
seemed fine for 5 years before SWMBO picked something else.
Not sure I've helped really :)
Don't 'soak' it - simply wet the back of the hardboard with cold water using
something like a paddle brush as if you were painting it and then leave it
to dry off.
What's the reason? It's simply to 'temper' the board to reduce the
likelyhood of movement when its laid.
On Tue, 23 Sep 2008 16:58:45 +0100, Peter Hemmings
Well you don't "soak" it .You lay it on the floor and go over it with
a brush and cold water and allow it to dry then lay it in place . I've
only done it a couple of times when laying vinyl on an uneven floor
and that was the way it was done .
Googling for an answer might help
found on the Screwfix Forum
To prevent sheets buckling due to a change in moisture content,
manufacturers recommend they should be conditioned before use. There
are two ways of doing this.
* For standard and LM (low density) type medium and tempered boards,
scrub the backs with water, using I litre to every 2440 x 1220mm
sheet. Then stack the sheets flat, back to back, for 24-48 hours
(48-72 hours for tempered boards).
* For HM (high-density) type, medium boards and all boards to be used
in centrally heated surroundings, stack the sheets on edge in the room
where they are to be used, separating them with wood off cuts to allow
the air to circulate. Leave HM medium boards for 48 hours and other
boards for 72 hours before using them.
Thanks for all the replies, it seems you are all right!
I have just bought the hardboard from a good local DIY shop. The owner
who happens to be French, said it was not necessary to wet his boards
as they were good quality, confirming earlier information.
He also advised what you say in your last paragraph, just to make sure
they stabilize to the surroundings. Here in the South west it can be
very humid where the board have been stored and its just good practice!
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