Constructing a workshop

[wabbitpoo]

I am about to construct a small workshop cabin inside my large, cold garage. What would people's recommendations be for insulation material between the inner and outer walls (which will be prob ext. osb and/or ply)? Also, do I need a dpm anywhere in that mix and if so, where?

Will be putting a floor down (again, of osb I imagine) so will put dpm under that on the existing concrete floor. However I ma a little concerned that a wooden floor on battening would be a bit bouncy for the lathe to sit on. Am I worrying too much about that?

Thanks.

 

[MikeG.]

WP,

If you are planning 100mm studwork walls then I would fully fill this with Kingspan, line it with stirling board (OSB) and forget vapour barriers altogether. In fact, with no natural ventilation within an existing building, there is actually quite a danger that an airtight heated space could be prone to mustiness and condensation.

The simplest suggestion I can come up with is to leave the door open when you're not there (if the garage is locked, of course).

I reckon you would be OK with just a floating floor (no joists/ battens.........just ply flooring straight onto 50mm Kingspan, trapped down at the edges with a skirting)...........but I guess you'll have to await a turner with a greater appreciation of the weight and vibrations from a lathe to confirm this.

Don't forget to insulate over your head!!

Mike

 

[mikec]

Hi Wabbit,

I agree with Mikes comments about condensation and wall construction etc.

For my floor I used polystyrene/Kingspan with several layers of 18mm chipboard on top covered with a sacrificial layer of hardboard. This has proven a solid enough base to fasten machinery. This is a floating floor the size of a double garage and was very cheap to construct.

My lathe is now in an adjoining utlity room with t&g wooden flooring on joists. I will be fastening this onto a ply/chipboard base to spread the load and stiffen the underlying floor boards. A much wqarmer environment in the winter

Hope this helps

Regards,

Mike C

 

[loftyhermes]

why not put the lathe in the cabin on the concrete floor and then build a wooden floor around it if it's a concern.

 

[Oryxdesign]

If you're worried about the weight of your lathe you could construct a timber frame under where it will be located. Mikes advice seems fine to me, if you notice any mustiness you could fit some ventillation, perhaps a humidistat fan?

 

[wabbitpoo]

Thanks for all the replies. I presume its usual to put the floor down, then build the stud side walls off that?

 

[Oryxdesign]

I'd do it the other way round, but maybe not entirely as I'd use the floor to get the walls square.

 

[wabbitpoo]

Hi Wabbit,

I agree with Mikes comments about condensation and wall construction etc.

For my floor I used polystyrene/Kingspan with several layers of 18mm chipboard on top covered with a sacrificial layer of hardboard.

How thick is your floor?!!!