Which Insulation Is Best for My Building? A Guide for New Construction

Planning a new build is your opportunity to ensure long-term comfort and efficiency from the ground up. The insulation you choose is the single greatest factor in achieving a high-quality home, yet it is often the most overlooked part of the planning process.

At Vermont Foam Insulation, we partner with homeowners and builders across Vermont to simplify the process of achieving superior building performance. We focus on providing the best-performing insulation solutions while making the entire process low-friction with our done-for-you approach.

The Premier Solution for New Construction: Why Spray Foam Wins

For new construction, you need a solution that future-proofs your investment. While traditional fiberglass or batting materials are common, they often fall short in two critical areas: air sealing and long-term thermal performance.

This is where spray foam insulation excels, establishing itself as the best insulation for modern building envelopes. Spray foam is not just insulation; it’s a complete air barrier. By expanding to fill every crack, void, and penetration, it simultaneously insulates and air-seals the structure in a single application.

This unique capability delivers immediate, measurable benefits for the life of your building:

  • Superior Energy Savings: Air sealing is the foundation of energy efficiency. By stopping air leaks, spray foam drastically lowers heating and cooling costs.
  • Unmatched Comfort: Drafts are eliminated and temperature stability is achieved year-round, making your new space truly livable.
  • Simplicity and Speed: Our professional VFI team works efficiently to keep your project on schedule, handling everything from evaluation to installation.

Open-Cell vs. Closed-Cell: Choosing the Right Spray Foam for the Job

To maximize the benefits for your project, it’s essential to understand the difference between the two primary types of spray foam. Leveraging these differences is key to optimizing performance in specific areas of the building envelope.

FeatureOpen-Cell Spray FoamClosed-Cell Spray Foam
DensityLighter, less denseHeavier, rigid
R-Value (per inch)Huntsman AgribalanceR Value: 4.5 per inchHuntsman Heatlok HFOR Value: 7.5 per inch
Moisture/VaporCLASS III vapor retarder  (rating above 1 PERM)CLASS II vapor retarder (rating below 1 PERM)
Air BarrierExcellentExcellent
StructureNo structural enhancementCan add structural support

Maximize Value by Choosing the Right Spray Foam Installers 

In order to maximize value with every installation, Vermont Foam Insulation incorporates the products and systems that have the best performance at the best cost to the customer. This often entails using a hybrid of both closed and open-cell spray foam in roof systems, resulting in a high R-value, air and vapor barrier control, and improved soundproofing, all while using as much of the framing space as possible. 

For walls, we almost always recommend closed-cell spray foam. However, open-cell can also be used in floors for soundproofing, when it is under radiant heat, and for filling impossible voids in complex designs. This is often in spaces like narrow gaps that lead to large framing voids, such as parallel rim joists, doubled-upTJIs, roof over-builds, and challenging framing intersections.

The Best Building Envelope Starts Here.

We work with builders, general contractors,  and architects to address design challenges, and provide solutions that ensure success. Get the best building envelope for your next project, when you partner with Vermont Foam Insulation!

Call Vermont Foam Insulation to schedule your free site evaluation today.

Get the best insulation for your home

Contact us today for a free estimate!

802-367-3113

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