Judy - T.
3/28/2019
Jerry and his crew installed 4 glass block windows with vents at my house this week. Their work is top notch and they cleaned up after the job was done. Quick, courteous, professional service and...
Granto Glass Block
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696 Niagara Falls Blvd
North Tonawanda, NY 14120
Granto Glass Block Company, based in North Tonawanda, NY, has been serving the Buffalo Niagara region since 1992. Specializing in glass block windows, walls, and partitions, they offer custom interior and exterior trim packages, rough framing services, and standard size installations for both residential and commercial projects.
This family-owned and operated business, led by owner Gerald Granto, takes pride in their veteran-owned status and commitment to quality craftsmanship. With a team that never uses subcontractors for window installations, Granto Glass Block Company is fully licensed, insured, and EPA NYS lead certified, ensuring a reliable and professional service for all customers.
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Reviews
3.55 reviews
Joe A.
2/21/2025
This business is attentive to customer service until they get your money. Had them install five glass block windows. Multiple window windows had missing mortar around the outside of them. Would...
Kevin C.
4/25/2022
Average job done with zero appreciation for their customers. They told me they'd return to seal my windows when the weather got nice. I was then told they sealed my windows when they hadn't as I...
Steve D.
3/24/2019
Installed four glass block windows with vents in my basement. They did a great job and they were in and out. Cleaned up after themselves. I recommend this company for installing glass block windows.
Nate F.
6/23/2018
Installed two glass block windows in my basement. They were quick and cleaned up after the job well.
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