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 - Conditioning Fibreboards |
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Before final fixing fibreboards should be conditioned ie. bring their moisture content into equilibrium with their surroundings in order to help prevent subsequent movement problems.
| BOARD TYPE |
CONDITIONING BY EXPOSURE TO AIR
|
CONDITIONING WITH WATER
(in unheated buildings
etc.) |
| Standard Hardboard
|
3 to 5 Days |
Ideally 48 to 72 Hrs - min 24Hrs |
| Tempered Hardboard
|
5 to 7 Days |
Ideally 72 to 96 Hrs - min 24Hrs |
| Medium Density Fibreboard (MDF) |
Only required if boardshave become very dry, 3 Days |
Not Recommended |
| Insulating Boards |
Remove all packaging, I to 2 Days |
Not Recommended |
| Flame Retardant Board |
FR Boards contain water soluble salts so must always be conditioned
in air |
Not Recommended |
To condition with water lay the boards down under cover. With a brush, rub clean water into the back face of the board at the rate of half to one litre for a board 2440 x 1220 x 3.2mm. Work from the centre outwards then place them wet side to wet side in a neat stack. The boards should then be allowed to stand for the appropriate minimum length of time given above.
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