Insulation for a lofted garage

Manuel

Hi All,
There is some similar discussion on a few old threads, but here's my question:

How should I build and insulate my lofted garage?

The downstairs is to be purely funtional space for gardening equipment, bikes, tools, water softener, fuel storage etc, and then the upstairs for domestic use, i.e. playroom, office.

For a while I believed the best option was to use cavity blocks, then dry-line the upstairs, but I read here that just internal dry-lining is pretty useless against the cold and damp that would get that far with no resistance.

Then I thought cavity wall with rigid board insulation throughout, until it was suggested I would also have to insulate the floor, and that a sliding garage door would be akin to an open door regarding heat loss.

So I'm open to suggestions, because I'm at a bit of a loss.

Any help appreciated.
/M.

gillad

there is no point in insulating the garage if you are putting in garage door.One option is to turn it into a shed with a normal 3 foot door.If you want a garage then build a normal 4 inch cavity wall with no insulation,it will be dry but not warm.

Manuel

Thanks gillad. So maybe I could build a normal 4-inch cavity wall without insulation as you say, and then insulate the loft part from the inside.

So upstairs I would have the cavity, and then some heavy duty dry-lining inside, and rolls of insulation in the first floor and in the roof. Would that be sufficient to make the loft habitable?

Having the cavity would give me the option of pumping beads into the whole lot in the future if needed, as one builder pointed out to me ....

Have any of you built a lofted garage? I'd really appreciate some feedback from your experiences ....

Thanks again.
/M.

gillad

"So upstairs I would have the cavity, and then some heavy duty dry-lining inside, and rolls of insulation in the first floor and in the roof. Would that be sufficient to make the loft habitable?" YES,that the perfect plan