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JM POLYISOCYANURATE ROOFING PRODUCT LINE Revised LTTR Values Effective January 1, 2014 ... All polyiso products follow ASTM C1289 (Standard Specification for Faced Rigid Polyisocyanurate Thermal Insulation Board). As part of that standard, the products must meet R-value requirements ... professional should specify insulation thickness based R ...


My question is how is the rigid insullation attached between the roof rafters? Most importantly, do you put the insulation (4.5 in thick) directly against the roof sheeting and leave air space between rigid insulation and drywall or do you attach the insulation so that the air space is between the roof sheeting and the insullation?


What Is the Thickness of R30 Rigid Insulation? The thickness of R-30 insulation varies, depending on the type of insulation used. Fiberglass panels and rolls with an R-30 insulation value have a typical thickness of eight to nine and a half inches.


Two different types of insulation with the same R-value should provide the same level of heat flow resistance even if the thicknesses are different. Rigid foam insulation typically gives the best insulation in the smallest thickness, measuring up to R-6.5 per inch.


• Rigid insulation: This insulates your home from the roof to the foundation, reducing energy losses through the house frame. • Reflective insulation: This type of insulation is most effective in reducing downward heat flow. ... 1 R30 to R49 R25 to R30 R13 *

www2.owenscorning.com/literature/pdfs/[02] FOAMULAR XPS Roof Insulation for Commercial...

FOAMULAR® XPS ROOF INSULATION FOR COMMERCIAL BUILDINGS PAGE 5 FOAMULAR® XPS ROOF INSULATION FOR COMMERCIAL BUILDINGS FOAMULAR ® XPS insulation is a rigid foam insulation which meets the needs of today’s design professionals for a truly sustainable insulation product. Owens Corning™ insulation products help improve thermal performance and control moisture in commercial, institutional and ...


Owens Corning® FOAMULAR® THERMAPINK® Extruded Polystyrene (XPS) Insulation is a closed cell, moisture resistant rigid foam board specially designed for roofing applications.


2014 POLYISO INSULATION LTTR R-VALUES TECHNICAL DATA BULLETIN SecurShield CD SecurShield CD is a rigid roof insulation panel composed of a closed-cell polyisocyanurate foam core manufactured on-line to an enhanced coated glass facer on each surface side to achieve greater fi re resistance over wood decks. † Size: 4' x 8' † Thickness: 1"


Foam-Control molded polystyrene insulation is used for a wide range of construction applications. Foam-Control insulation is available in a range of standard R-values and standard thicknesses to meet all your application requirements. THICKNESS & R-VALUE


The average cost of flat roof insulation is $0.67 per square foot (for 1 inch thick PolyISO with 6-R value). High quality rigid foam insulation that is properly installed will greatly improve ventilation, eliminate drastic temperature fluctuations inside the home, and protect from leaks. Here are the best insulation materials along with prices, features, and r values.