I do have a question, below, about where to buy board suitable for flooring but before I get to that I thought some folks might be interested in info I found out about grades of chipboard. (Strictly, I think these may be grades of particleboard - perhaps leading to the "P" in the grade name. Maybe someone can confirm whether that's right or not.)
Chipboard grades
P1 - "General purpose" P2 - Boards for making cabinets, not load-bearing P3 - Moisture resistant, not load-bearing P4 - Load bearing for dry conditions P5 - Load bearing, moisture resistant P6 - Heavy duty load bearing for dry conditions P7 - Heavy duty load bearing, moisture resistant
From some specs it seems that the differences between the normal and heavy duty load-bearing grades (e.g. between P4 and P6) is not the thickness (such as 18mm or 22mm) but the rating of how far apart the joist centres can be:
P4 and P5: 450mm P6 and P7: 600mm
Others say that 18mm is for 450mm joist spacing and 22mm for 610mm spacing.
Sizes
It seems that it's not possible to buy flooring-grade chipboard in 8x4 sheets. At least, I couldn't find any. Instead, square-edged P4-P7 seem to come in 3050 x 1220mm sizes.
Anyway, that's just background. Can anyone tell me a good source of chipboard with the following spec
- flooring-grade P4 and P5 (I need some of both)
- 18mm thick
- square edged, i.e. not tongued and grooved
- with a UK delivery service (to Aberdeen, in this case)
The board sizes are not that important as long as they can be delivered. Within the spec, lowest cost would be best.
I also need some plasterboard sheets as follows
- some for moist environments (a bathroom)
- some with thermal insulation properties
- some regular
so if one supplier will deliver both chipboard and plasterboard that would be a bonus.
Anyone know of a good supplier of such materials? I am not trade registered so it would have to be a retailer.
James