Commercial buildings require a “cavity wall” of air space and insulation to provide protection from weather and fire. Since the required thickness of insulation affects the cost of construction, more and more builders and architects are choosing polyiso cavity wall insulation because of its superior R-value.

 
Foil-faced polyiso insulation has the highest R-value per inch so the design U-value of the cavity wall system can be achieved with minimum thickness allowing the overall footprint of the building to decrease thereby considerably reducing the cost of construction. The thickness of the polyiso insulation required due to its excellent R-value allows increased air space between the inner and outer wythes allowing the cavity to function at a higher level to more efficiently remove water to the outside. The foil-face on the polyiso insulation is an impermeable material which enhances long term thermal performance.

Click here for a technical bulletin on Polyiso Insulation in Masonry Cavity Walls.