Replacement Windows
Our windows are backed by a lifetime, non-prorated transferable, limited warranty on the frame and sash materials with a 20 year warranty.
Vinyl Siding
Tri-State Window and Siding Co. Inc. has the largest number of VSI Certified Installers of ANY Home Improvement Company in the State of New Hampshire!
Farmers Porches & Verandas
A new Tri-State built Farmer's Porch can really put a new face on your home enhancing your home's charm and appearance for years to come.
Additions & Garages
Add value, space and your own personal style to your home with a customized ADDITION.
Custom Exterior Siding & Trimwork
Tri-State Window and Siding Co. Inc. can create any custom look you desire. Siding, trimwork and stonework.
Exterior Doors
Tri-State Window and Siding has a wide selection of doors for your home, patio, atrium and a large selection of fiberglass, wood or steel entry doors.
Designer Decks
Hassle free, easy – care DESIGNER DECKS are a reality with Maintenance Free Composite Decking and beautiful White Composite or Vinyl Handrails.
Kitchen & Interior Remodeling
Our secret recipe for designing a beautiful kitchen include planning with our 20/20 design program
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Tri-State Window & Siding has been in the home improvement business for over 35 years
What We Do
Our Projects
Professional In Home Office Suite for Manchester Attorney
Working from home never looked so good!
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Garage Addition & Breezeway in Londonderry
Red barn theme garage with unique circular garage door trimwork!
Read MoreCertifications & Endorsements
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Our Customer Testimonials
We are pleased with our new windows and siding. Great Experience!
You are my first choice installers. I appreciate your services.
Fast and prompt service! Tri-State came to our house and came up with a very competitive quote for siding, windows and doors.
Great company to work with!
It was a terrific experience working with Loren and his crew! We were quoted $15k for basic windows + flat picture from over-aggressive pitchmen at NewPro and Andersen. With Tri-State’s $10k quote, we got Prairie grid windows, Bay window, and shutters! The crew was friendly, paid attention to detail, and very motivated. We are very pleased with our home’s new appearance!
