Blog Insul Techs

At Insul Techs, our mission is to help homeowners and builders make smarter decisions about energy efficiency and insulation. One of the most important—but often overlooked—decisions in home performance is how the attic is designed and insulated. Should it be vented or unvented?

Let’s break down the differences and how Insul Techs delivers high-performance insulation solutions tailored to each type.

Attic Behavior in Winter: Managing Heat Loss and Moisture

 Vented Attic (Winter):

• Cold air enters through soffit vents and exits through the ridge.
• Warm air escapes through poorly insulated attic floors.
• Humid air from the conditioned space can reach the attic and condense on cold surfaces, potentially causing mold and rot.

 Unvented Attic (Winter):

• Closed-cell spray foam is applied directly under the roof deck.
• This seals the attic from outside air and reduces heat loss dramatically.
• Moisture and humidity from inside stay controlled, as the foam also acts as a vapor barrier.

 At Insul Techs, we specialize in high-performance spray foam systems that create sealed, energy-efficient, and moisture-resistant unvented attics.

Attic Behavior in Summer: Controlling Heat Gain and Radiation

 Vented Attic (Summer):

• Solar radiation heats up the roof, and that heat transfers into the attic.
• Even with ventilation, radiant heat enters the home unless insulation is optimal.
• HVAC systems located in hot attics work harder, raising energy bills.

 Unvented Attic (Summer):

• The roofline is insulated with closed-cell foam, blocking most radiant heat.
• The attic becomes a semi-conditioned space, keeping temperatures more stable.
• HVAC systems operate more efficiently in cooler, sealed spaces.

 Insul Techs helps turn attics into thermal shields with spray foam insulation that significantly lowers energy consumption in hot California summers.

Why Choose Insul Techs?

We bring expert evaluation and custom insulation solutions for both residential and commercial spaces:

 Professional Assessment – We assess whether a vented or unvented system is right for your structure.
 Closed-Cell Spray Foam – Ideal for unvented attics with high insulation value and vapor barrier in one.
 Fiberglass & Mineral Wool Options – Effective and budget-friendly for vented attics.
 Moisture and Air Control – Our systems help maintain indoor air quality and long-term performance.

Serving Northern California with Precision

From Concord, CA, we serve clients across a 100-mile radius—ensuring comfort, performance, and energy savings.

 Need help upgrading your attic?
Visit www.insultechs.com or call us at  925-595-8020 to schedule a no-obligation evaluation.