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Top-Rated Glass block installation pros in Fishtail - Updated Nov 2026

Allen's Siding & Windows, Inc.
New to Angi
Glass Blocks - InstallStained or Specialty Glass - Install or ReplaceStained or Specialty Glass - Repair

Serving Fishtail, MT and surrounding areas

In business since 1988

Allen's Siding & Windows, Inc., is a Full Service,Owner Operated Company for over 17 years in complete exterior home improvements from custom design additions, sunrooms, patios, and decks to complete siding and window installations and repairs as well as all exterior window treatments including custom shutters and awnings. We specialize in ALSIDE ULTRAMAX Windows, which have been energy star partner for 3 years running. We work with you from start to finish with complete client focus, and professional personalized service giving superior craftsmanship with attention to each detail to ensure we create the vision you have for your home. Hire The Contractor not a Salesman. Please see our website at www.sydngys.com

Glass Block Windows FAQs, answered by experts

You can still see vaguely into some types of glass block windows at night. Although there won’t be clear definitions, passersby may still see shapes, shadows, and movement through the glass. If you want complete privacy, consider installing diamond glass block windows rather than the typical clear or wavy glass blocks.

Yes, many professionals provide custom-cut glass replacements for enclosures that require precise sizing.

Options include tempered, laminated, and tinted glass for various needs.

Most installations take 1-3 days, depending on the number of blocks and customization requirements.

Glass block installation can be relatively expensive due to the range of material costs and the labor time to assemble this type of specialty window. The process proceeds slowly as the glass does not absorb moisture from mortar and silicone caulk takes longer to harden, leaving spacers to hold up the structure until the caulk or mortar begins to cure. Plus, if your current windows have structural issues or damage, you’ll need to repair them before beginning the project, increasing your bottom line. 

The Fishtail, MT homeowners’ guide to glass block window services

From average costs to expert advice, get all the answers you need to get your job done.