I've never managed to get concret and wood to glue successfully, so I'd say
sealant and screws as per your idea is best.
Brian

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From the Sofa of Brian Gaff Reply address is active
"Peter Percival" wrote in message
...
I have inherited a shed made of cast (or moulded, whatever the word is)
concrete for the lower walls on which the rest is built of wood. (It has a
made-up as it was constructed look about it.) The wood is rotten and I
need to replace it. How can I attach the new wood to the concrete? I
could use screws--those things that expand against the hole they are in
when an internal screw is tightened--but that will leave a crack 'twixt
concrete and wood where the rain might get in. So I need (I think) an
adhesive cum sealant. Any suggestions?
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I think I am an Elephant,
Behind another Elephant
Behind /another/ Elephant who isn't really there....
A.A. Milne