Siding Insulation - Polyisocyanurate Insulation Sheathing

Enerfoil by IKO is a rigid polyisocyanurate insulation sheathing with a foil facer laminated on the top and bottom side. Manufactured at IKO's state of the art ISO 9001-2008 registered facility, Enerfoil is a sheathing that:

• Provides high termal resitance of R6 per inch (RSI 1.05 per 25 mm) for improved energy efficient performance of walls.
• Helps decrease the cost of construction. Designers can reduce the overall footprint of their buildings, as a smaller thickness of Enerfoil achieves the same R-value (RSI) of other types of insulation.
• Is environmentally friendly. No ozone-depleting HCFC's are used in the manufacture of Enerfoil, making it an ideal "Green" product. Enerfoil's Energy Star certification menas that i clearly contributes to reducing energy consumption.
• Is user-friendly. Laminated facers on both sides of the sheathing provide moderate abuse-resistance of the jobsite. Enerfoil is lightweight & easy to cut, thus reducing labor costs on the site. Stud indicators improve accuracy of installation.
• Provides versatility. Foil facings provide the long-term moisture resitance necessary for cavity wall applications. Enerfoil's facings are also compatible with solvent-based materials, which can attach and compromise the performance of the other termoplastic insulations.
• Has a uniform thickness for consitently maintaining air space requirenments in cavity wall applications.

Retrofit Application

Corrective action should be taken where evidence of moisture-related problems exist. This may include the replacement or repair of framing members, increased ventilation or installation of a vapor retarder. Install Enerfoil vertically and butt all edges. Secure boards with sashers fasteners and penetrate framing members a minimum of 3/4" (20mm). Install new siding according to manufacturer's instructions.

Effective Thermal Performance

Exterior stud walls are often designed to achieve a nominal thermal resistance value. This methodology, which is based on insulation alone, assumes a consistent rate of heat transfer along the wall. However, framing members typically have a higher rate of heat transfer than the areas in between them. High heat transfer along the studs, or thermal bridging, leads to a lower thermal efficiency for the overall wall assembly. Therefore, it is better to consider the combined effect of the framing materials and insulation in the assembly and calculate the effective R-value (RSI).

Thermal Values

Thickness		R-Value	Qty./Skid
mm	inches
12	0.5	3.3	90
18	0.75	5.0	60
25	1.0	6.5	46
38	1.5	9.8	30
50	2.0	13.0	23
75	3.0	19.0	15