Cooler in Hot Weather and Reduce Moisture Condensation Attic Rafter Vents comprise XPS that is thermoformed to a shape that, when installed between roof rafters, allows air to flow from the soffit to the attic space, keeping attics cooler in hot weather and help reduce moisture condensation in the attic during cold weather. They help optimize performance of attic insulation by minimizing wind washing, prevent blown insulation from blocking the airflow, and keep the space between soffit vents and attic space open during construction over time. Kingspan GreenGuard Vent Product Data Table Product Highlights Available in straight or flex variations For use in 16" or 24" rafter spaces Does not rot or deteriorate Frequently Asked Questions What's the R-Value of vacuum insulation?: Kingspan OPTIM-R has a design R-value of 28. Why choose vacuum insulation panels?: VIPs provide the thinnest possible solution to insulation problems, while also providing an insulating performance that is up to five times better than commonly used insulation materials. Where can I use Phenolic insulation?: It can be used in a variety of ceiling and wall applications, which makes it a great solution for a range of constructions. Find out more information in our technical brochures. What's the R-value of phenolic inuslation?: Our Kooltherm insulation achieves a R-value up to 7.4 per inch. How do I install XPS on my basement wall?: You can glue or fasten the board to the concrete wall. When applying the glue, place a minimum of 5 large sections of glue in the 4 corners and one in the center. Install the board to the wall and apply pressure until the glue holds tight. You can find compatible adhesives in our TB11. Kingspan recommends Loctite Power Grab Adhesive. You can fasten the board to the wall with 5 Plasti-Grip PMF Anchors from TRUFAST. Apply common spray foam to the top and bottom to provide an airtight seal around the XPS board. XPS must be covered by a code approved thermal barrier such as drywall. This is for occupied spaces. Does fanfold provide good insulation value?: The primary purpose of fanfold is to level out the walls, so the new siding goes on straight. Fanfold does provide some additional R-Value to the wall depending on the thickness. Should the reflective surface be placed to the outside or the inside?: Since reflective surfaces are designed to reflect radiant heat, it is common practice to install the radiant surface to the predominantly warm side of the wall. In an extremely cold climate, that would mean installing with the reflective surface inward. In a hot climate, it would be installed with the radiant surface outward. In climates that are more balanced, it may be installed either way, depending on whether the objective is to reduce heat loss in winter or reduce heat gain in summer. Technical Info GreenGuard Flex Vent can be used in the residential, commercial, etc. applications. GreenGuard Staight Vent can be used in the residential, commercial, etc. applications. GreenGuard is Extruded Polystyrene (XPS) GreenGuard Flex Vent is 22.5" wide and 48" long. Product Data Sheet Pricing varies by zone. The only difference between straight and flat vents is that the straight vent has a small bend at the bottom to help protect spray insulation from falling into the soffit.
