Wooden Garage / Garden Building membrane?

[mic2876uk]

Hi All,

I'm planning on constructing a wooden garage / garden building this summer.

As I plan to insulate inside and potentially plasterboard inside do I need a waterproof membrane behind the outer cladding?

The finished building from the house should look something like this only a bit bigger and with a garage door on the rear side.

Obviously it will have a concrete floor so thinking will build a dwarf wall to lift the timbers of the ground.

Any advice?

Also it will be build around an existing concrete prefab that will have 2 of the wall removed along with the roof. the remaining 2 walls will be part of the final structure but will be clad outside and boarded over inside so once complete will be indetectable.

 

[Leofric]

Basically if the timber cladding is vertical boarding as shown on your photo the construction working from the outside inwards should be :-
timber cladding ,horizontal tantalised timber battens on vertical tantalised timber counter battens , breathable membrane, wbp ply boarding ,insulation between tanalised sw studding, vapour barrier, plasterboard and skim.

 

[mic2876uk]

Basically if the timber cladding is vertical boarding as shown on your photo the construction working from the outside inwards should be :-
timber cladding ,horizontal tantalised timber battens on vertical tantalised timber counter battens , breathable membrane, wbp ply boarding ,insulation between tanalised sw studding, vapour barrier, plasterboard and skim.

Exactly what I was after.

How do I deal with opening for windows and doors? how do I end the membrane and vapour barrier?

Also how do I join the individual breathable membranes? (or do I just overlap starting at the bottom?)

 

[Leofric]

You need to look up typical details for top and bottom of wall, window head, jamb and cill. I haven't got any in front of me at the moment.