We offer a large range of doors and windows for all types of projects. Front entrance doors are a focal point so picking the right door and the right accent color is a plus in making your investment the right one. We have a huge selection of windows so we can find the right fit every time, or let us custom fit our large windows to your space.

Whether you want to keep out the cold or have the freedom to let in just enough of fresh, New Hampshire air, great windows and doors that help make it happen. And they don’t have to cost an arm and a leg.

With numerous style options combined with expert installation and support by our team, our customers always enjoy convenience, energy efficiency, and durability from their windows and doors.


By Harvey, CertainTeed, Alside, and More

Photo of windows

Since 1967, we’ve helped customers select the right windows for a wide variety of scenarios and budgets. Today, one of the most popular choices remains vinyl replacement windows. Vinyl windows are just as easy to clean as vinyl siding, and easily stand-up to New Hampshire’s rough winters. We also frequently install wood windows, bay windows, bow windows, garden windows and a various range of triple glazed windows with high energy specifications.

Windows for New Construction: New construction doesn’t have to be hard. We strive to make the entire window installation (and selection) process incredibly easy. With C. Gosselin Siding & Windows, competitive quotes, careful service, and products that guarantee long term quality help us make your new home stand-out and stand-up to the elements for years to come.

Replacement Windows and Window Repair: If you’re having a problem with any of the windows in your home and need an experienced replacement window installer, our 50+ years of experience can help solve it fast.


By Harvey doors, Therma-Tru doors and Jeldwen doors.

Photo of siding doors

Your front door is often the first thing you’ll notice about your house. Why not love it? On top of all the colors available, when you add options like inserts, accent colors, and door styles, it can help to have someone who’s been there before (and we’re happy to help).

With plenty of great paintable and pre-painted products from suppliers like Harvey products and CertainTeed - we can find a door that’s perfect for your style, your budget, and your maintenance preferences. Looking for sliding doors, porch doors, and storm doors? We can help there too.

Doors for New Construction: Installing the front door of your home is a substantial milestone. Naturally, you want to make a great choice that lasts. Our door installation experts will work with you to find the best style and design for your home and your budget, while handling everything from delivery to installation.

Replacement front doors, storm doors, and more: Damage to windows and doors never happens at a convenient time. Whether you’re replacing a front door with glass inserts or you’re switching from wood to fiberglass, our experience and selection of products make sure you’ll love your new door.

We only partner with the best brands:
Harvey Building Products
Mastic Home Exteriors