Gentlemen,

Working on a concrete block house. It's to be gutted down to the inside of the concrete and re-finished inside. First time for me - it's always been wood-frames up til now.

So - usually, I gut it down to the studs, then instal fibreglass, vapour barrier, drywall, etc. But this is VERY different.

There's simple 1" x 3" strapping nailed vertically to the concrete block, then 1" x 14" barn board nailed horizontally on top of that, then 10-ply paper board nailed on top of that. In some areas, someone has previously nailed 2" x 3" studs over the barn board, insulated with styrofoam, and covered with panelling. It's all coming off!!

THEN - does anything have to go over the concrete before attaching studs or insulation? I'd put sill plate between the studs and the concrete for moisture, but I mean anything else?

Thanks.

 

Dike Hey dont yell at me,I didnt name it!Anyway,Dike makes a product that you brush or roll on the concrete that stops moisture from getting in.Another thing you should do is set-up a hose around the perimeter of the building before you cover the walls to check for any moisture getting in.

 

UGL drylock works well on walls for moisture. Concrete block on the interior can add thermal mass. Extruded polystyrene insulation on the exterior can be covered with stucco for protection and to hide the block. Exterior insulation also keeps your interior space as large as possible and covers the insulation gaps at interior partitions.

 

I would have to know where you live before I could answer, but I agree doing it externally. Two inch polystyrene, taped and sprayed with a water sealent.

 

Agree with the others that externally is the better of the two, but if you have other reasons to be redoing the interior walls, and don't want to deal with the outside walls, I'd first use the drylock (or whatever), then a layer of plastic sheeting, then lath, then rigid foam (Dowboard is waterproof so probably best choice) & then your paneling or drywall. The foamboard can be cut to go between the lath but with or without that layer you may want to consider applying one OVER the lath (to make a more uniform & airtight layer). I've never had any trouble fastening drywall or paneling over rigid foam, you just have to use longer fasteners.