Roof Insulations - Page 6

	Roof Insulations
	Nord Board® Roof Insulation

Description

Nord Board Roof Insulation is a rigid insulation board, composed of expanded perlite and cellulosic fibers. The top surface is coated with a modified APP asphalt coating and polyolefin film which allows for the direct application of heat-welded APP or PAO membrane products.

Application

Nord Board is intended for use as a low thermal roof insulation board and general purpose cover board for use over closed cell foam insulation boards in APP or PAO membrane roofing systems, for new construction over wood and concrete decks, or for reroofing applications over smooth or gravel surfaced roofs. It is usually mechanically fastened, but can be adhered with hot asphalt in certain applications.

When applying Nord Board directly over metal decks, a minimum ¾" (19 mm) Nord Board must be used. ½" (13 mm) Nord Board is not for use directly over steel decks, but may be used over other approved foam plastic or insulation boards in metal deck applications.

Sizes

4' x 4' (1.22 m x 1.22 m), with nominal thicknesses of ½" (13 mm), ¾" (19 mm), and 1" (25 mm).

Advantages

Environmentally Friendly. The minimum recycled content utilized in Nord Board is 25% by weight for ¾ " and 1" (19 mm and 25 mm) thickness. The minimum recycled content utilized in ½ " (13 mm) Nord Board is 35% by weight.

Nord Board complies with Environmental Protection Agency Regulation 40 CFR Part 248, Guideline for Federal Procurement of Building Insulation Products Containing Recovered Materials, as a recycled product approved for use on any project using federal funds.

Labor Savings. Nord Board is coated with an APP coating, which allows for direct heat weld application of APP or PAO membranes without the need for an additional base separator sheet, thereby improving cost and labor efficiencies in installation.

Dimensional Stability. Because of its perlite composition and low water absorption rates, Nord Board is dimensionally stable over a wide range of weather conditions.

Fire Resistance. Because of its perlite content, Nord Board offers far greater fire resistance than conventional wood fiber materials.

Thermal Values

Applicable Standards

Nord Board complies with the material requirements of ASTM C 728. There are numerous Factory Mutual fire and wind-resistant systems and specific Underwriters Laboratories, Inc. Class A constructions approved with Nord Board.

Technical Data

For Use Over Metal Decks 1

The minimum thicknesses of Nord Board insulation over metal decks are as follows: