Window Replacement Contractors in CT

A1 Home Improvement is a family-owned window replacement contractor serving central Connecticut and the shoreline for 30 years. We measure, order, install and haul away, with our own crews, on full-home and multi-window replacement projects. If your windows are drafty, fogged between the panes, painted shut or just past their useful life, we replace them with energy-efficient vinyl windows fitted to your home.



Every project starts with a free in-home estimate. We come to you, measure every opening, walk you through the options and give you a written price. No pressure and no obligation.

Connecticut has plenty of window companies. Here is what you get when you hire ours.

• Licensed and insured. Connecticut Home Improvement Contractor license HIC #063642. Fully insured, so your home and our crew are covered while we are on site.
• Local offices, not a call center. Berlin, Rocky Hill and Old Saybrook. When you call, you reach our office, and the people who quote your job are the people who show up.
• Family-owned for 30 years. We have replaced windows on thousands of Connecticut homes and we are still here to stand behind the work.
• 4.9 stars from 600+ homeowners. Read the reviews before you call us. We would rather you compare.
• A clean install. Old windows removed and hauled away, openings sealed and trimmed, the site left the way we found it.
• One point of contact. Measure, order, install and warranty all handled by A1, not passed between a salesperson, a supplier and a subcontractor.
  

• Lower heating and cooling bills. Low-E glass and sealed frames stop the drafts that make your furnace and AC work harder.
• A quieter, more comfortable home. Consistent temperatures room to room and less noise from the street.
• Better security. Modern locks and tempered glass on every unit we install.
• Curb appeal. New windows change how the whole house looks, inside and out.
• Resale value. Replacement windows are one of the exterior upgrades buyers pay for.
  

We install and replace every common residential window style, and we will recommend the right one for each opening during your estimate.

• Double-hung: the standard for most CT homes, easy to clean and ventilate
• Casement: cranks open for maximum airflow, clean modern lines
• Slider: simple operation and a wide view
• Bay and bow: adds light, space and character to a front room
• Awning: ventilation even in rain
• Picture: fixed glass for light and views where you do not need to open
  
  

Choosing windows is a set of small decisions, and we make them with you at your home:

• Glass and efficiency. Low-E coatings and gas fills, matched to which side of the house the window faces.
• Frame material. Vinyl is the right answer for most Connecticut homes: durable, low maintenance and cost-effective. We will tell you when it is not.
• Style. Double-hung, casement, slider, bay or picture, chosen per opening, not one style forced on the whole house.
• Measurement. We measure every opening ourselves. Replacement windows are made to size, and a wrong measurement is the most common cause of a bad install.
• Budget and financing. A written price for the whole job, and financing arranged on the spot if you want it.

There is no single price because no two homes are the same. Your quote comes down to:

• How many windows, and their sizes
• Style and glass package (double-hung vinyl with Low-E glass is the most common choice)
• Whether any openings need framing, trim or rot repair before the new unit goes in
• Removal and haul-away of the old windows, which we include



We take on full-home and multi-window projects with a four-window minimum. The only accurate number is one measured at your home, and we give you that number free in writing. Most homeowners use our financing to turn the total into a low monthly payment.

1. Free in-home estimate. We measure every opening and give you a written price.
2. Windows made to size. Your units are manufactured to our measurements.
3. Installation day. Our crew removes the old windows, sets and seals the new ones, and trims them out.
4. Walkthrough. We check every window with you before we leave, and haul away the old ones.
   

Every window we install carries the manufacturer's warranty on the unit and A1's warranty on the installation. If a window we installed leaks air or water, or a sash stops operating, you call us, not the factory.

When it comes to replacement windows, choosing a reputable brand can make all the difference. Here are some top brands known for their quality and reliability:

• Pella: Renowned for their high-quality windows and comprehensive warranty, Pella offers a wide range of styles and materials to suit any home.
• Andersen: Andersen provides a diverse selection of window styles and materials, including wood and vinyl, known for their durability and aesthetic appeal.
• Marvin: Marvin is known for high-end windows with advanced features and a comprehensive warranty, offering exceptional performance and longevity.
• Harvey: Harvey offers a variety of window styles and materials, including vinyl and fiberglass, known for their energy efficiency and durability.
• Advanced Window Systems: Specializing in high-quality vinyl replacement windows, Advanced Window Systems provides advanced features and a comprehensive warranty, ensuring long-term satisfaction.



We install Harvey, Andersen, Pella and Marvin windows and will recommend the line that fits your home and budget.