 |
 |
|
|
|
| Advantage Vented Nailable Base |
 |
Advantage Vented Nailable Base is a two-component system composed of Rmax’s polyisocyanurate foam insulation and a separate OSB nailing surface, with ¾” furring strips attached. The insulation portion of this product is Rmax’s rigid closed cell polyisocyanurate foam with glass fiber/organic mat facers laminated to top and bottom surfaces. The nailing surface of this product is a 7/16” OSB wood panel (APA Rated) with factory-applied 3/4” furring strips. This nailing surface is installed over the insulation in a second step to complete the overall product installation.
The insulation is laid on the roof deck with staggered joints and tightly abutted edges to minimize thermal short-circuits. Thermal bridging can be further reduced by using two layers of insulation when higher R-values are required. The nailing surface can then be installed, staggering joints from the insulation below, with the proper 1/16” gaps between OSB panels. This allows for the differences in expansion of the OSB versus insulation.
Follow recommendations of the shingle supplier for application of underlayment felts and other details as required for roof pitches of less than 3” in 12” per foot slope. Rmax recommends that a layer of roofing felt be installed over wood roof decks prior to installing Advantage Vented Nailable Base insulation.
Advantage Vented Nailable Base is superior for use in residential or commercial roofing applications where a vented assembly is desired. Advantage Vented Nailable Base is applied to the roof structure in order to provide a layer of thermal insulation and a suitable substrate for the application of a variety of shingles available in the market today.
A wide variety of insulation thicknesses, manufactured on a made-to-order basis, are available from Rmax to more closely match insulation values (thermal resistance) to project requirements.
Advantage Vented Nailable Base must be secured to the roof structure with FM listed roofing screws at least one-inch longer than the composite thickness of the total insulation panel system. Screws without plates are recommended. Rmax does not require the foam insulation component to be fastened separately prior to installing the nailing surface component. Fastening pattern shall be in vertical rows along each furring strip. There shall be three (3) fasteners per furring strip. |
 |
Density, Overall (Nominal) : 2.0 pcf
Compressive Strength (Average) : 20 psi
Flame Spread, Core²: 25 or less
Smoke Developed, Core² : 55 - 215
Water Vapor Transmission : < 1 perm
Water Absorption : < 1% Vol.
Dimensional Stability : 2% Linear Change
Service Temperatures : -40'F to + 250'F |
|
|
|
|
|
