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Last Update: October 23, 2024

Extended Panels – Tapered Polyiso Benefits and Strategy

When tackling options to reduce overall costs on a tapered roof system, designers look at a variety of specialty products including prefabricated target sumps, prefabricated hips and valleys, and extended panel profiles. The design of your tapered roof system determines if any of these options will benefit your “material cost vs. labor cost” totals.

Insulation adhesive costs can be lowered drastically by reducing the number of layers in a tapered profile. Take a standard 1/8” taper profile with a 4-panel repeat:

Using layers of 2.0” flat insulation at every repeat, you’re looking at multiple layers of 2.0” to achieve a 64’ run. It goes without saying that more layers of insulation require more adhesive to adhere the system. This profile requires 40 panels of application.

Let’s look at the same 64’ run but using extended panels:

Using this extended panel profile, we’re able to lower the number of insulation layers, thus reducing the adhesive required to adhere the system. This profile requires only 24 panels of application

The easiest way to show the benefits of extended panels is a side-by-side project analysis:

The design on the left (4-panel repeat) requires 257 squares of application. The design on the right (8-panel repeat) requires 159 squares of application. The cost of insulation for the extended panel option is only $2,300 more than the standard repeat option. 

The standout savings in the extended panel design are in adhesive costs. The extended panel option will require 4 fewer tanks of adhesive, yielding a savings of ~$4,800 in adhesive. Regarding labor costs, using fewer layers of insulation means less material handling and field cutting.

The above comparisons are utilizing the 1/8” profile as the example for this article, but extended panel options are available in all profiles (1/8”, 3/16”, 1/4”, 3/8”, 1/2”).

Hunter Panels, headquartered in Portland, Maine, manufactures thermal efficient Polyiso insulation for roof and wall applications. Hunter Panels currently manufactures its product at seven facilities in New York, Illinois, Florida, Texas, Utah, Washington, and Pennsylvania. Learn more about Hunter Panels at www.hunterpanels.com.