I've had to put a new wooden door on the garage. What's the best way of
treating this? Normally I'd wait for a dry summer day and varnish it but
can I use varnish when it's freezing like this? Luckily it's in a
sheltered spot which doesn't get much rain so it'll stay mostly dry over
winter but I'd still like to treat it asap. Given the choice I wouldn't
have done it now but since the old one broke we had to get a new one put in.

Thanks
--
John