Frontier Builders Supply

Insulation & Venting

Comfort starts with the right insulation.
From freezing winters to blazing summers, your home or building needs materials that work year-round. At Frontier Builders Supply, we carry trusted brands of insulation and attic ventilation to help you stay energy efficient and comfortable, no matter what the forecast looks like.

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Insulation options

Keep the heat where it belongs—inside in the winter, outside in the summer:

Guardian fiberglass insulation
CertainTeed rigid insulation
Green Fiber blown-in cellulose
Jet Stream Ultra blown-in fiberglass
LowE foil housewrap (great for reducing radiant heat)

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Attic Ventilation

Proper ventilation helps extend the life of your roof and prevent moisture issues. We carry:

Lomanco attic ventilation products
Quarrix attic ventilation systems

Not Sure What You Need?

Our team is here to help you choose the right insulation type and R-value for your project. Whether you’re insulating a new build or upgrading an older space, we’ll help you find what works best.

Understanding R-Value: A Quick Guide

R-value measures how well insulation resists heat flow—the higher the R-value, the better the thermal performance. The recommended R-value depends on your location and where you’re insulating (walls, attic, floors, etc.).

Recommended R-Values for North Dakota (Zone 7)

Area of Home	Recommended R-Value
Attic	R-49 to R-60
2×4 Wall Cavities	R-13 to R-15
2×6 Wall Cavities	R-19 to R-21
Floors	R-25 to R-30
Basement Walls	R-11 to R-15
Crawl Spaces	R-19 to R-25