Ceiling Insulation for existing steel building

[TTMotorsports]

Ok so my new home has a 30x80 x 12' eve steel building on it already. The purlins are 2" square box tubing. The walls I insulated with fiberglass matt and drywalled it. No the ceiling has a ridge vent since it is cooled by a large swap cooler. BUT the ceiling being metal it gets very hot with sun beating down on in all day. The shop is loaded up with all my tools, equiptment and vehicles so I can't unload it and do spray foam insulation. I need the full 12' height, possibly 14' would be ideal so I can put my 12' tall pallet racks in easily.

Now I am thinking about going up 2 purlins and running a steel stud from side to side, approx 20' length and support it from the roof up heigher to prevent sagging on them at all. Then putting a ridge cap on the building instead of a vent, which won't be an issue since there is a large exhaust vent fan on opposite wall from swap cooler at other end of the shop. Remounting the LED lights on new drywalled ceiling. Then doing blown in insulation to approx 4" thick on that to provide insulation from above now. I will lose the light from the skylights but that's not a problem with the quality led lights I have. Going up 2 purlins will allow me to put an angle on the drywall above the swamp cooler and exhaust fan on other end wall.

Does this sound like a feasible plan or do you guys have a better idea? Thanks

 

[jmdirk]

I'd check with a place that does metal building insulation and retrofits. Silvercote for example. They may be able to design you something that requires minimal rework to your structure

 

[My Old Tools]

Just strap it and do wide roll insulation.

 

[TTMotorsports]

Thanks. My original plan was to hang white back insulation from the ceiling. Just need to find a supplier that can provide me rools for the 80' length of the building and around 17' long so I can go from ridge cap to eves