Credentials

Granite State Home Improvements (GSHI) ensures you that only the best and brightest contractors will be working on your property.

Granite State Home Improvements is certified through the Vinyl Siding Institute's Certified Installer Program. We’re also honored to have received an Award of Distinction for Historic Restoration from the Vinyl Siding Institute.

GSHI is recognized by CertainTeed as a Siding Master contractor.  CertainTeed’s Craftsman program trains professionals in advanced installation, product standards, and industry best practices for siding. This credential validates expertise in installing CertainTeed products like vinyl and composite siding. Certified contractors must pass exams on product technology to ensure high-quality, professional results.

GSHI is recognized by CertainTeed as a ShingleMaster Company.  A CertainTeed ShingleMaster is a professional roofing contractor certified for high-quality, reliable installations, representing the top tier of roofing professionals. GSHI roofing installers undergo rigorous training, have longevity in business, and provide superior warranty options.

Granite State Home Improvements is proud to be a Lead Safe Certified Firm, and as such has been trained in the latest lead safe renovation practices.

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WE’RE CERTIFIABLY GOOD AT WHAT WE DO