🪟 The Window Source Replacement Window Company in Nashua, NH Double Hung Windows Installed

If you live in Nashua, NH, or the surrounding area, you know how important well-built windows are to staying comfortable year-round. At The Window Source of New Hampshire, we’ve spent more than a decade helping homeowners across southern New Hampshire upgrade their homes with double-hung replacement windows that combine beauty, performance, and value.

Windows That Fit Your Home and Lifestyle

Nashua is known for its tree-lined neighborhoods, classic colonials, and family-friendly communities — and your windows should complement that charm. Our double-hung windows are a perfect match for the region’s mix of old and new construction. Both sashes move smoothly for easy ventilation and tilt in for effortless cleaning. With insulated glass and precision weatherstripping, you’ll enjoy lower energy costs and year-round comfort through New Hampshire’s changing seasons.

Local Experts You Can Count On

Our installation team knows southern New Hampshire homes inside and out. Each window is custom-measured and built to fit your home exactly, ensuring a clean, efficient installation every time. We take pride in providing friendly, professional service — the kind you’d expect from a locally owned business that’s been part of this community for over 12 years. Every project is backed by our lifetime product and installation warranty, giving you lasting confidence in your investment.

Proudly Serving Nashua and Nearby Communities

From downtown Nashua’s classic homes to newer neighborhoods in Merrimack, Hollis, and Amherst, our team is trusted across the area for quality workmanship and dependable results. Because our showroom and main office are just a short drive away, you’ll always have local support and prompt service whenever you need it.

Schedule a Free Estimate

If your windows are drafty, difficult to open, or simply outdated, it’s time to upgrade. Contact The Window Source of New Hampshire today for a free, no-pressure quote on double-hung replacement windows in Nashua, NH. See why homeowners across Hillsborough County choose us for energy savings, curb appeal, and craftsmanship that lasts a lifetime.