Window and Door Installation Across, Western PA

Source 4 Window and Door installs windows, doors, and siding for homeowners across Armstrong, Butler, and Beaver Counties, and Lawrence County, backed by 31+ years of hands-on experience.

A Licensed, Family-Owned Installer Serving Western Pennsylvania

Source 4 Window and Door is a licensed window, door, and siding installation company based in West Sunbury, PA, serving Armstrong County, Butler County, Beaver County, and Lawrence County since February 2024, led by founder John DeRunk, who brings over 31 years of hands-on installation experience.

Every project starts with a free, no-obligation estimate, and financing is available through Synchrony for homeowners who want to move forward without delay.

Three Core Installation Services

Person painting the exterior wall of a white house beside a window in sunlight.

Window Installation

Precision-fitted replacement windows that cut drafts and improve energy performance.

Man installing a front door window on a brick house exterior.

Door Installation

Entry, storm, and patio doors installed tight and built to last through PA winters.

Siding panel installation on a home exterior.

Siding Installation

Durable exterior siding that protects homes from moisture and wind.

Why Homeowners Choose Source 4 Window and Door

Source 4 Window and Door holds Pennsylvania Home Improvement Contractor License No. PA 192461, verifiable through the state registry.

We're family-owned and operated, not a franchise with rotating crews. Founder John DeRunk answers for the work personally.

With over 31 years of hands-on installation work, we deliver fewer surprises, tighter fits, and fewer callbacks. We are also A-rated by the BBB.

What Our Customers Say

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Serving Homeowners Across Western Pennsylvania

Armstrong County

Window, door, and siding installations for homeowners from Kittanning to the surrounding rural townships.

Butler County

Full installation services from Butler borough to Cranberry Township.

Beaver County

Coverage from Beaver Falls to communities along the Ohio River corridor.

Lawrence County

Full range of window, door, and siding services with free estimates.

Get Your Free Estimate Today

Homeowners across Armstrong, Butler, and Beaver Counties, and Lawrence COUNTY can request a free, no-obligation estimate by phone or online, with financing available through Synchrony.