New Green Building Products — September 2010

first_img This article is only available to GBA Prime Members Sign up for a free trial and get instant access to this article as well as GBA’s complete library of premium articles and construction details. In this new-product roundup, I’ll look at a cover for recessed can lights, a new caulk for polyethylene, and several new water-resistive barriers (WRBs) that promise better performance than Tyvek or Typar.A fire-resistant hat for recessed can lightsA Delaware manufacturer named Tenmat is selling an airtight hat for recessed can lights. Tenmat light covers are made from mineral wool; according to the manufacturer, they are fire-resistant.Tenmat covers are installed from the attic. After making a slit in the cover to accommodate the electrical cable, the cover is pushed down to the drywall ceiling. The cover should be glued to the drywall with canned foam or thermal caulk. Needless to say, the slit or hole made for the cable needs to be sealed with housewrap tape or canned foam.Once the Tenmat covers are installed, the ceiling can be insulated with almost any type of insulation, including fiberglass batts, cellulose, or spray polyurethane foam.Tenmat covers come in two sizes: “regular” (9 inches high and 14 inches wide) and “oversized” (10 3/4 inches high and 16 inches wide). Energy Federation Incorporated sells regular size Tenmat covers for $19.65 each.Besides the high price, there’s only one catch to Tenmat covers: the covers can only be used for recessed can fixtures equipped with CFL or LED bulbs. If a homeowner inserts an incandescent or halogen bulb in the fixture, it can overheat.Dow Corning 758 caulkDow Corning has come out with a new caulk that sticks to a great variety of materials, including polyethylene.The new sealant, Dow Corning 758, is a silicone caulk that the manufacturer claims will stick to polyethylene, polypropylene, vinyl, polyolefin housewrap (for example, Typar), peel-and-stick flashing (including Vycor and Tyvek window flashing), and peel-and-stick membrane (including Ice and Water Shield). The broad range of materials to which it… center_img Start Free Trial Already a member? Log inlast_img

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