How to insulate a workshop?
Planning on having a 60’ (L) x 30’ (W) x 12’ (H) post and frame (pole building), built in climate zone 5B. The building will be bisected by a 2×6 interior wall so that 36’ x 30’ will be used as an un-insulated garage and the remaining 24’ x 30’ will serve as an insulated and conditioned workshop. The floor will be 4” concrete slab on grade poured after the building is erected. Exterior walls are metal panels mounted to wall girts and the roof is also metal on engineered trusses.
How best to insulate just the work shop area? I have some ideas, but I also need some direction as well. Note: While I know this is a website about constructing really good homes, this is a workshop, so my budget is limited.
Ceiling: As the workshop area only needs a 10’ ceiling, I was considering using raised heel trusses for that area which would lower the ceiling from the 12’ garage height and allow me to use blown in cellulose above the sheet rocked finished ceiling. The trusses above the garage space and the workshop would be open to the garage space. Any problems with this setup?
Walls: Exterior walls are metal. I would add interior commercial wall girts (horizontal 2×4’s, 2’ spacing) to mount sheet rock. Wall thickness would be the same as a 2×6 stud wall. I was thinking BIB for the wall insulation. Do I need house wrap for the exterior walls? The interior wall will be sheet rocked on both sides how should this be insulated/house wrapped?
Floor: I do want to add 3” of foam sheet insulation under the workshop slab area, but at the same time I don’t need to insulate under the garage. What is the best way to create a thermal break in the concrete slab between the two areas? Install a pressure treated 2×6 in the concrete where the wall will be located?
Special floor question: In pole buildings the 2×6 or 2×8 splash board at the bottom of the wall typically serves as a form when pouring the concrete slab. Can I add solid foam insulation to the splash board or is there a better method to insulate this area?
Thanks in advance, Ken
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