Workshop Ceiling Construction Query

[Spindle]

Hi

Another garage conversion thread I'm afraid but having searched and read through other relevant posts I still have a couple of questions.

I have a 6m x 6m double garage, block wall construction with a tiled and sarked gable roof that I'd like to make more enticing to use in the winter by cladding and insulating. I've started to research installing a ceiling onto the roof trusses, the rafters of which are 95mm x 38mm @ 600mm centres.

I've read plenty of recommendations to use OSB but am wondering what thickness would be best, could I get away with 9mm? In a similar vein I have noticed that at some thickness' MDF is cheaper than OSB, is there any reason not to use MDF? MFD appeals to me as I believe the surface finish would look better when painted. The garage does not suffer from damp.
Once the sheeting is up I would plan to insulate with 100mm fibre glass, is this reasonable?

I'll stop there for now because I'm sure I'll be back with questions about cladding the walls.

Regards Mick

 

[carlb40]

I would say 9mm will be fine, i would be tempted to put noggins in between the trusses to stiffen it up and catch the edges of the boards. Don't forget 9.5mm plasterboard often gets used on ceilings. I would probably fit a row of boards, insulate. Then board/insulate etc. I would also probably put a min of 150mm insulation in, it will be warmer and you have the space.

 

[LJM]

You may want to hold fire on the insulation; B&Q and others often heavily discount theirs in the summer.

 

[nev]

plasterboard and at least 6 lnches of 'soft' insulation, orinsulated plasterboard. (can seem a tad pricey but by the time youve added the price of separate (new) insulation to the price of the boards, its about the same but half the work).

 

[Spindle]

Hi

Thanks for the feedback, I like the advice re waiting for summer discounts on insulation.

Nev - I've shyed away from plasterboard as others have pointed out how prone it is to damage when manoeuvring large sheets etc.

Regards Mick

 

[carlb40]

It depends on how you will be boarding the ceiling. Will you be doing it on your own? Or will you have help? If your on your own, the 6 x 3 plasterboards will be easier to move/fit by one person. Even at 9mm, an 8 x 4 sheet of mdf will be heavy holding above your head while fixing it.

 

[Spindle]

Hi

Sorry - I see where the confusion has come from :roll:

I'm concerned about an installed plasterboard ceiling being damage at a later stage by my careless handling of large sheet material or long lengths of boards etc.

Regards Mick

 

[LJM]

I guess that depends upon the height of the ceiling, the room you have to maneuver and the size of the material maneuvered; certainly it would be more vulnerable to knocks than ply or mdf. How about match wood? It's easily fitted on your own. Having said that, you could hire a plasterboard lift, which simplifies fitting any sheet material to a ceiling.

 

[101wheeler]

I used a double layer of plasterboard suspended off resilient bars (for noise reduction). Not that hard to do (but you lose a bit of head height). Go outside the garage now and close the door with the planer thicknesser running - can't hear it at all!!

Worth every penny to me with neighbours living close by,

Paul