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Free Estimate

406-837-5070 (Bigfork)

406-857-3306 (Somers)

406-844-2442 (Lakeside)

Replacement Windows & Doors

Give your home a makeover. SLITERS Lumber & Building Supply offers energy-efficient replacement windows and doors for any home. Visit us in Lakeside, Somers, or Bigfork, Montana, to learn more about our selection. We also carry a great selection of paint and stains.


Andersen is one of the nation's most trusted names in windows and doors. They have been around for a long time, and have an excellent reputation for value. When you choose Andersen products, you get the lowest possible prices without sacrificing quality. Come on in to explore the different product lines we carry.


Vinyl windows are efficient, durable, and attractive. Cascade is one of the industry's leading providers of vinyl windows. Their products represent the perfect marriage of quality and price.

Sign and Windows

Any Style

Windows are a fun and expressive design element. The right windows can dramatically improve the appearance of your home and add to its curb appeal. We offer a wide range of window and door styles, including:

• Low-Energy, Efficient Wood Windows
• Vinyl Clad Windows
• Double-Hung Windows
• French Doors
• Sliding Doors
• Patio Doors

Custom Designs

Every home is different, and standard sizes may not work for your property. We are happy to order custom sizes upon request. These orders usually only take a few weeks to arrive.