Need advice in setting an 36″ exterior door on a conc floor slab. We have a nice square 2×6 framed opening. The wood door is prehung in a wood frame w/ an integral metal threshold. Does the threshold have to be attached to the concrete? (Seems like w/ both jambs anchored and sill attached, there is no way for it to move any where) Should the threshold sit right on the slab, or should I shim it up a bit? (not needed for finish floor material) Should I use construction adhesive? Caulk? What about insulation? This door is in a protected area, so drainage, runoff water, etc. are no factor.
Edited 9/17/2009 1:20 pm ET by varch