Hi, I'm re-doing our house internal entryway with a timber floor. It currently has quarry tiles. Can I glue spotted gum T&G flooring directly to the concrete slab? If so, what kind of glue should I use?

Standard practice is to batten the concrete floor first with timber battens at 450mm centres. Battens need to be thick enough to suit the nails fastening the flooring.

Thanks Rustynail, hopefully I have the clearance to do that (there is an internal stairway leading from the entry, and I'm concerned about the new floor being a lot higher than the top tread of this stairway ).

If you check with some of the flooring retailers who specialize in timber flooring, they will be able to point you in the right direction.

Bostick make an Adhesive that will stick Timber direct to Concrete.

Not cheap though.

Jeff

The current method of fixing (WA) timber T & G flooring to concrete is to lay a skin of 12 mm plywood sheets direct stick to the concrete using SikaFlex special flooring adhesive and concrete nails. The T & G timber flooring is then direct fixed to the plywood again using the SikaFlex adhisive and secret nailing through the tongue into the ply.
Sikaflex make a special adhesive for flooring, it comes in a sausage type container and you would require a special adapter to apply.
T&G timber flooring for this application is specially run and is approx 16mm thick.
Check out Boral Timber supplies as they handle T& G flooring and should have details on fixing flooring.
Regards
Mac