Montana's door specialists

Entry doors, patio doors, and commercial entrances — beautifully crafted and built for Montana's climate.

A well-chosen door improves your home's energy efficiency, security, curb appeal, and resale value all at once. At Valley Glass, we carry an extensive selection of residential and commercial doors for every application — from fiberglass and steel entry doors to sliding patio doors, interior doors, automatic commercial entrances, and aluminum storefronts. As an authorized dealer for Therma-Tru, Jeld-Wen, and Horton Automatics, we bring Montana homeowners and businesses access to the industry's most trusted door brands, backed by our own expert installation team.

Montana's extreme winters and variable weather demand doors that seal tight, insulate effectively, and hold up for decades. Since 1966, Valley Glass has been helping homeowners and businesses across Montana find the right door for every budget, every style, and every climate challenge the Big Sky can throw at it.

Our Door Products

Steel Entry Doors

View through glass doors of a wooden cabin ceiling to a balcony overlooking a lake.

All Aluminum Doors

Modern outdoor patio with seating, fire pit, dining table, overlooking trees and a lake at sunset.

Sliding Patio Doors

View of a calm lake and tree-covered shore through a wooden-framed sliding glass door onto a deck.

Automatic Entrance Doors

Automatic sliding glass entrance doors framed in aluminum on a brick building facade.

Aluminum Storefront Doors

Commercial building entrance with large glass and aluminum doors and stone columns on a paved walkway.

And More...

Modern wooden house patio with gray outdoor sofas, dining table, and forest lake view.

Modern kitchen sink with a rough stone apron, stainless steel faucet, and stone wall backdrop.

Professional door installation across Montana.

Get in touch

Every door installation at Valley Glass is carried out by experienced technicians who understand the demands of Montana's climate. From a single entry door replacement in Plains to a full commercial storefront in Kalispell, we bring the same precision and professionalism to every project. Visit one of our showrooms or contact us today to find the right door for your home or business.