About Business

We care about the homes & the people who love them.

Serving New Hampshire and Massachusetts.

Denmarc Exteriors is an owner-operated company dedicated to quality installations of all styles of windows, doors, and Vinyl Siding.

As the owner of Denmarc Exteriors, there are a few things I would like you to know about me and the people I work with.

We are professionals and we realize how important your home is to you. There are no showrooms or warehouses, it helps to keep costs down. We also realize, that these days, it is especially hard to trust anyone. What I want you to know most of all is that we will respect you, your family, your home and your neighbors. It is that simple! Please consider Denmarc Exteriors and I will not let you down.
Marc Sylvain, Owner

The Denmarc Exteriors DIFFERENCE
Honesty and reliability are two things you can count on. Our goal is to ensure the job is done right and that you get the service you’re paying for. You’ll never have to worry about a job taking too long or costs racking up. We’re here to do the job right and fast.