How much does new glass cost?

• <div><p>New glass costs anywhere from <b>$3 to $100 per square foot</b>. More specifically, tempered and insulated glass—a common option for sliding glass doors—costs between <b>$10 and $14 per square foot</b>.</p></div>

How thick are glass walls?

• <div><p>Their thickness depends on application, but most glass walls are typically 3/8 to 3/4 of an inch thick. Although it’s not as common, single panes of glass can also be 1 inch thick. </p></div>

Get matched with top glass block pros in Black Eagle, MT

Q: Do professionals offer custom glass replacement?

• <div><p>Yes, many professionals provide custom-cut glass replacements for enclosures that require precise sizing.</p></div>

Q: What kind of mortar do you use for glass block windows?

• <div><p>Glass block mortar is the best choice for glass block window units. It is specifically formulated for glass block window installation. Glass block mortar is usually a mixture of Portland cement, sand, and special chemicals. It is a white mortar that is applicable inside and outside your home. Do not use regular tile mortar because it may not have the binding strength and flexibility required for glass block windows.</p></div>

Q: Do glass block windows need maintenance?

• <div><p>Luckily, glass block windows need minimal maintenance. Other than regular cleaning, the only maintenance involved in having a glass block window is inspecting for cracks every year and applying sealer to the mortar joints if the blocks are set in masonry mortar. Glass block windows hold up well against wind and moisture better than traditional windows and are not prone to rot.</p></div>

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Verified Reviews for Glass Block Service pros in Black Eagle, MT

*The Angi rating for Glass Block Service companies in Black Eagle, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Glass Block Service needs.

*The HomeAdvisor rating for Glass Block Service companies in Black Eagle, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Glass Block Service needs.

Last update on October 14, 2025

Reviewed in October 2025
They came down and did an absolutely free roof inspection for me. All though they didn't find anything too concerning they still took pictures even and went over it with me. They are super knowledgeable in their field and I know I'll be giving them a call next hail storm.
American Roofing and Exteriors
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Reviewed in April 2021
A 2 1/2 day job with a full crew: windows, glass doors, and screens cleaning ("specific project" above did not allow this entry); professional, friendly, positive work attitude; meticulous in their work. We've already asked to be booked for next year.
Ninja Window Washing
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Reviewed in March 2021
Orangeburg sewer line broke and line was totally blocked. Andre Excavation and Sewer excavated the line and burst the orangeburg pipe. The line was repaired followed by back fillng and compacting. We, ages 81 and 83, were able to remain in the home. We recommend Andre Excavation and Sewer...
ANDRE EXCAVATION & SEWER SVC
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Reviewed in February 2021
We required two full window replacements and glass replaced to remove square panels in our living room window andrew it needed to be done prior to our siding installation. They built the windows, coordinated with our siding company and had them installed earlier than expected preventing delays....
CHINOOK WINDOWS
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Reviewed in November 2020
Fast. Friendly. The installers are amazing. Very respectful and their work is amazing. We hand a new sliding glass does and picture window installed and they did a fantastic job
Renewal by Andersen of Montana
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Reviewed in August 2018
I used Americas choice for 2 projects last summer. A new roof on a rental property duplex and garage; and on a bigger project at my home that involved a new roof, garage door, gutters and downspouts, painting, and window replacements. They are very fine people and were a pleasure to work, with...
Americas Choice Roofing
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Reviewed in December 2016
I signed the agreement in September, they came fairly quickly to do the roofing. When they were in process,they ran out of shingles and the unfinished garage and shed sat for a week or so. During that time, I noticed they shingled OVER the satellite dish and cable. I also noticed nails visibly...
Great Falls Roofing & Painting
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Reviewed in August 2015
Fence painted but when the gate is open, ends not painted. Four windows in one block under the patio and two outside of patio did not have the ends of the windows painted. Called to verify the paint left here was exterior paint as the can was marked "Int" on the top of the can. Talked to Greg...
Kinder Painting
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Reviewed in May 2015
They did all the tile work and glass work. There were some problems and they had guaranteed my tile work for life and told me that if I ever had a problem with it, they'd come back. I had some problems and talked to them five separate times and I could not get them to come back. Now I have to...
J-N-J Tile
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Reviewed in September 2013
The receptionist was very friendly. They were able to replace the windshield on my old car very quickly and for a great price. Thank you Glass Doctor! <br />
Glass Doctor of Great Falls
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Find Glass block pros in Black Eagle

Allen's Siding & Windows, Inc.

New to Angi

Serving Black Eagle, 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

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Glass Block questions, answered by experts

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

Glass block mortar is the best choice for glass block window units. It is specifically formulated for glass block window installation. Glass block mortar is usually a mixture of Portland cement, sand, and special chemicals. It is a white mortar that is applicable inside and outside your home. Do not use regular tile mortar because it may not have the binding strength and flexibility required for glass block windows.

New glass costs anywhere from $3 to $100 per square foot. More specifically, tempered and insulated glass—a common option for sliding glass doors—costs between $10 and $14 per square foot.

Their thickness depends on application, but most glass walls are typically 3/8 to 3/4 of an inch thick. Although it’s not as common, single panes of glass can also be 1 inch thick.

Luckily, glass block windows need minimal maintenance. Other than regular cleaning, the only maintenance involved in having a glass block window is inspecting for cracks every year and applying sealer to the mortar joints if the blocks are set in masonry mortar. Glass block windows hold up well against wind and moisture better than traditional windows and are not prone to rot.

The Black Eagle, MT homeowners’ guide to glass block services

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

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