Fire Rated Insulated Concrete 2nd floor?

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Author Message Jeff Williams New member Username: jeff Post Number: 1 Registered: 12-2011 Posted on Tuesday, December 06, 2011 - 05:10 pm:    I have a living area on a concrete slab over a garage below. Conditioned space over unconditioned. The floor also needs to be fire rated 1 hour so I will be using spray applied fire proofing over the concrete slab and beams. I need to achieve a decent r factor on the floor. What products are available? J. Peter Jordan (Unregistered Guest) Unregistered guest Posted on Tuesday, December 06, 2011 - 05:43 pm:    Usually the concrete slab will be sufficient to achieve the 1-hour rating; why wouldn't it be in this case? Although it sounds expensive, I would almost suggest a layer of rigid plastic insulation over the concrete slab with a layer of fire-rated cement board over the insulation to be used as a subfloor surface. Two inches should get you close to R-12. You can put this underneath, but you should really should not leave it exposed. George A. Everding, AIA, CSI, CCS, CCCA Senior Member Username: geverding Post Number: 614 Registered: 11-2004 Posted on Tuesday, December 06, 2011 - 09:12 pm:    Look at K-13 insulation by International Cellulose http://www.internationalcellulose.com/products/k13.html George A. Everding AIA CSI CCS CCCA Ingersoll Rand Security Technologies St. Louis, MO