Can insulated siding make an older New England home warmer?

Written By: Stephanie Vanderbilt, Owner

Reviewed By: Coastal Windows & Exteriors

Last updated: September 9, 2026

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Insulated siding can make an older home warmer — its foam layer retains heat and adds real insulating power to the walls, so your home feels warmer in winter. Coastal Windows & Exteriors is a woman-owned exterior remodeling company with 7,000+ installations completed since 2011, serving 730+ towns across Massachusetts, New Hampshire and Maine.

Meanwhile, simultaneously sealing air leaks can cut a home’s air infiltration by about 25%.

Where the Warmth Really Comes From

Heat retention: Insulated siding retains heat inside the home, adding a thermal layer across the walls. Request a free estimate to review your walls.
Insulation gap: About 89% of United States homes are under-insulated, leaving walls that lose heat. Closing that gap steadies indoor temperatures in winter.
Thicker core: CraneBoard Solid Core siding is a 1 1/8 inch board-like composite. It offers more insulating power than fiber cement, wood or brick.
Air sealing: Sealing minor gaps and holes cuts home air leakage by 25% to 30%. Pair siding with air sealing for a real comfort change.
Foam and drainage: Select CraneBoard profiles feature enhanced foam technology and moisture-management ridges. A foam-board layer behind siding adds insulation while draining moisture.

Getting a Real Comfort Change

Top Recommendation: Insulated siding like CraneBoard adds a warm thermal layer to exterior walls. Book a free estimate!

Best for Whole-Home Comfort: Pair new siding with added insulation and air sealing together. Ask us to assess your walls.

Smart for Drafts: Seal gaps first, then let insulated siding hold the warmth in. Schedule a comfort review.

Ready for a warmer, steadier home? Start with a free wall and insulation review. Coastal Windows & Exteriors is a woman-owned, family-run company founded in 2011. Our team brings 7,000+ installations across MA, NH, and ME, backed by a 4.8-star rating with 1,000+ reviews.

Request a free siding estimate from Coastal Windows & Exteriors.

Browse our complete siding FAQ guide from Coastal Windows & Exteriors.

Explore the Coastal Windows & Exteriors Siding Exterior Remodeling Home Improvement Help Center.

Still have questions about Can Insulated Siding Make an Older Home Warmer? See the areas we serve and talk to your local siding contractor.

Last Updated: August 2026

Sources:

CraneBoard Solid Core siding is a 1 1/8 inch board-like composite that retains heat, offers more insulating power than fiber cement, wood or brick, and carries a Life of the Home Limited Warranty. Exterior Portfolio CraneBoard Solid Core Siding, Westlake Royal’s product page on CraneBoard insulated siding. (Accessed August 2026)
Sealing air leaks throughout a home can achieve about a 25% reduction in total air infiltration. ENERGY STAR Methodology for Estimated Energy Savings, federal modeling on air-sealing energy savings. (Accessed August 2026)
About 89% of homes in the United States are under-insulated. Insulation Institute ICF Report Reveals Eighty-Nine Percent of Homes Are Under-Insulated, industry report on residential insulation levels. (2024)

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