Garage Conversion

[Tom]

Hi

Due to wife expecting our second child next year I am looking to convert part of my detached garage into an office, it is brick built with a flat roof and concrete floor a window will also be added. I intend to insulate all walls by using a timber frame and then putting plasterboard over it, i will also be insulating the dividing stud wall along with ceiling and floor.

The new room size will be 3m x 3.3m and i think i will need approximately

48m sq of insulation,. What type do you think i should use?

Is it ok to use Chipboard for the flooring?, this will be on a timber frame on top of a DPM. I would also like to line the walls with chipboard over a DPM to give even betting insulation before creating a timber frame, is this a good idea?

Thank you in advance for your comment & opinions.

Thanks Tom

[Phil L]

Fibreglass or rockwool, both fire retardant and both work very well, along with them being as cheap as chips, although you can expect a volley of suggestions to use celotex or other types but they will be 3 times the price of fibreglass and there's little *real* difference in heat retention, despite the claims.

not really, no....you will gain almost nothing by doing this, but if you dot & dabbed plasterboard onto the bare walls prior to building the studding, you would gain substansially more

[Roger Mills]

Sounds reasonable - but don't forget to check on building regs. Being a detached garage, it was probably exempt - but won't be when part of it is living accommodation. If the other part is still a garage - or even if it may only be used for storing flammable materials - you'll need suitable fire protection between the garage and office parts.

I'm not sure whether you'll also need planning permission for change of use. It may be as well to check.

[meow2222]

if its for habitation, you'll want insulation in your new wall cavity and also under the floor.

NT

[Christian McArdle]

I would use Kingspan K17 boards. This has the advantage of not requiring the wooden frame to be built and you don't need plasterboard, either.

Yes.

Christian.