Installation Services

Your window and door replacement partners.

Your Trusted New England Window and Door Replacement Partners

New, expertly installed windows and doors can improve and preserve your home, save you money, and make your favorite spaces feel more comfortable and secure. JB Sash & Door has the knowledge, skill, and reputation for installing quality windows and doors the right way, and we’re ready to help you with your upcoming replacement project.

Get Started by Talking to an Expert.

We understand that replacing your windows and doors can be a daunting process. But it doesn’t have to be! Work directly with our replacement specialists and start your project with a free,  in-home consultation or simply begin with a consultation over the phone.

marvin installer boston

Perfecting Our Process for 82 Years

We have served thousands of customers since we opened up shop 82 years ago.
Our process is designed with ease and convenience in mind.

Free- in home consultation

During an in-home consultation, our replacement expert will evaluate and measure your windows and doors, answer questions, talk through installation options and provide you with a free quote.


Installation Services

Installation is an easy and hassle-free experience. Our dedicated team handles it all for you, and makes sure you’re satisfied.


Product Selection

Let us help you decide between wood, aluminum-clad, and fiberglass window and doors.



All of our products are backed by manufacturer warranty, giving you peace of mind that your investment is protected.

certified marvin installing retailer e1673117651444

JB Sash is proud to be your local Marvin Certified Installing Retailer.

We partner with Marvin because of their performance, durability, and beauty. Our Marvin certification speaks to our experience, expertise, and dedication to exceptional service.

Limited Lifetime Guarantee +2 Years Install Warranty

We proudly offer a Limited Lifetime Warranty to our customers on all of our replacement windows and doors. As a locally-owned business, we believe in providing our customers with the best possible service. We believe that a decision like replacing your windows, should only be made once. Plus, we offer a two-year service installation warranty for additional peace of mind.

Variety of styles & materials

When you partner with JB Sash, you will have a wide variety of styles and materials to choose from.
Our product collections have an array of design options to customize your windows and doors, reflecting your unique home’s architecture, character, and personality.

Let us help you decide among wood, aluminum-clad and fiberglass windows and doors.
We’ll discuss their differences and advantages, and determine the best fit for your needs.

what our customers are saying

Replacing Windows in A Historic District?

We have been designing, building, painting, and installing historically accurate windows in Boston and the surrounding area for more than 80 years.

Our custom historic reproductions match existing windows and fit any brick or wood opening. We work to secure any necessary permits and help ensure your project is granted historic approval.

Proper Bostonian Seal
Therma Tru Fiberglass Entry Door

Your One-Stop Shop for High-Quality Entry Doors

Choosing the perfect door for your home has never been easier. With our JB Sash Turnkey Entry Door Install Program, you can select from a handpicked selection of top-selling fiberglass doors from Therma-Tru – a trusted brand in the industry.

Meet Our Replacement Solutions Team

Our installation team is very responsive, and takes the time to understand customers’ needs and concerns. They will help you understand the process every step of the way, ensuring nothing feels overwhelming. They help transform your space and bring your vision to life. 

Replacement Specialist

Gary Troy

Installation Sales

Marilyn Garrett

Installation Coordinator

Heidi Beaudoin

Replacement Specialist

Andrew Clark

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Get a FREE quote.

Your worry-free window & door replacement journey starts here!

From Our Inspiration Center

Replace window this winter

Winter Window Replacement: Can you replace windows in the winter?

Winter is coming, and you still haven’t taken the steps to set up an appointment to learn more about replacing your windows. Unfortunately, it is typically this time of year when regret sets in for Massachusetts homeowners planning to replace their windows during the warmer season but missed the window of opportunity. And now find themselves in yet another battle between energy savings and comfort. We get it; regret can be uncomfortable, but what if we told you that it’s not too late for a winter window replacement!

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