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| lordedmond:
Chris If you are worried then bond it down with construction adhesive that will hold it . Note it's the stuff from the builders merchant not the day stuff Stuart |
| awemawson:
I agree with Stuart that construction adhesive avoids the possibility, if you use it you'll need to weight the sheets to stop them bowing as it sets. But if there is a dpc it should be under the concrete slab, and for a garage that slab should be at least 4" If you are using 18mm osb3, (and personally I wouldn't use any thinner stuff) and 2" No 10 screws you should only be penetrating 1 1/4". I hope that you have a decent SDS drill - it's a lot of screws on an 18" matrix, and that's what's needed to stop slight humps that 'click' when you walk on them. |
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