How To Insulate A Cathedral Ceiling

Install unfaced mass insulation with at least a 1 inch air-gap between it and roof sheathing.
Staple, screw or glue (Super metal Sealant) Prodex Total to underside of trusses.
Seal seams with reflective tape or order Prodex Fast Action or 10M to avoid having to use seam tape.
Install 1" x 2" wood strapping under Prodex Total.
Install Drywall over the strapping.

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Official site of Prodex Total Insulation in USA and CAN

WARRANTY, TERMS AND CONDITIONS There are no warranties except those contained herein.Insulation4Less has not authorized any person or company to assume, on its behalf, any liability in connection with the materials supplied not to increase the scope of the warranty. The goods when properly constructed, shall meet the specifications listed on website. All materials are free of defects in workmanship.We will replace or repair at our discretion any defective material furnished within 3 weeks of delivery upon presentation of satisfactory evidence of such defect, but no claims for direct or consequential damage will be allowed. To speed up delivery, processing of your order is immediate. If you are concerned with any application, please consult your local contractor or code official prior to purchase.Please make sure you have selected the product that best meets your needs. Our warehouse is not set up to accept returns. All orders are final. No refunds will be granted.