convert garage to room

[x5x3]

We currently have a double garage - one of which is internal and one external, the external part has a high angled roof and inside the garage there is a "loft" area.

Does anyone know how easy it would be to convert this area into a room accessible from inside the house?

I want to keep the two garages but would like to make better use of the space above this?

Thanks in advance.

[BRGV8S]

Did this for a client who hiuse was on a slopping site, from memory 4.0 metres floor to ceiling in garage with mezzanine floor for storage. Found access point from ground floor to access some differances in level. New floor installed over garage area with window above garage door.

Left enough room to take car below. Check levels to see if your project is feasable

[x5x3]

thanks - we are very flat here - I was more wondering what is required - e.g. converting single skin wall to double, insulation, etc

[BRGV8S]

Sorry, did that for another client, First check with your LA that planning permission is NOT required to convert garage to part of dwelling normally PD (Permitted Development) but this can be removed by LA as condition on original site approval.

Building Regulations approval will be required, if the existing wall between units is single skin un-insulated it will need to be brought up to current standards, easiest route is breather membrane / galvanised MS studs from Britisg Gypsun / rigid insulation board between studs over boarded pl/bd and skim finish.

Floor will need insulation, rigid board with floating floor over assuming your property as adequate ground floor damp proof menbrane under slab.

Infill existing garage door opening to match existing property (off new) foundation, window installed to meet U-value for glazing with trickle vent / side hung opener for means of escape (depends on internal layout)

hope this helps

[x5x3]

thanks - that is what I was looking for!

my problem is we are just about to start a loft conversion (I get a room for myself!!!!!) and now everyone else wants a room of their own.....

[eps]

Don't forget fire regs will apply to the floor of the room, as the garage is below it.

[x5x3]

eps said:

Don't forget fire regs will apply to the floor of the room, as the garage is below it.

sorry but what does that mean in practical terms?

[ACEparts_com]

We're just got planning permission and building regs to do this. As we're converting it to a bathroom and changing from a flat roof to a pitched it was decided that the easiest solution is to demolish the garage and rebuild it properly, possibly using a timber frame. Reason is to stop the damp & cold issue.

[eps]

You will need to show that there is sufficient insulation in there and also that it will be held in place for 30 minutes, for instance some wire mesh / cages below the insulation. This stops items falling from the ceiling to the garage below.

For instance (although there are other ways of doing this!)

170 joists (I don't know what size your joists are!)

From underside upwards..

12mm plasterboard

100mm Crown Dritherm 32 on mesh support trays

70mm Crown Dritherm 32

19mm T&G flooring

What form is the current garage roof structure? Is it a cut roof or truss?

[x5x3]

eps said:

You will need to show that there is sufficient insulation in there and also that it will be held in place for 30 minutes, for instance some wire mesh / cages below the insulation. This stops items falling from the ceiling to the garage below.

For instance (although there are other ways of doing this!)

170 joists (I don't know what size your joists are!)

From underside upwards..

12mm plasterboard

100mm Crown Dritherm 32 on mesh support trays

70mm Crown Dritherm 32

19mm T&G flooring

What form is the current garage roof structure? Is it a cut roof or truss?

I did ask for that I guess!

Thanks but it means little to me - I think you are all saying it is feasible and probably permitted from a local council point of view.

We have the loft conversion guy coming tomorrow so will see what he thinks

[eps]

It's easy... Crown Dritherm 32 is insulation of the wool type... The rest _should_ be understandable..
It's the best non rigid board insulation you'll get.

If you've got a loft conversion "expert" on the case he should know all of this anyway. If he doesn't
mention fire regs, ask about them.. See what his answer is.

[dxg]

If you're keeping the area underneath / to the side as garage, then you'll need 1 hour fire resistance on all dividing walls. So that's two layers of plasterboard - fireline?