Glass Block Blogger

In a previous post about installing Glass Block, we covered height, load support, and anchoring guidelines for your project. In this post, we will cover the more general issue of whether to choose an installation method that uses mortar or to do a mortar-less glass block installation; and the options within these choices.

When installing Pittsburgh Corning Glass Block, these are the four general installation methods and their specifications that you should consider.

Mortar I and Mortar II

Mortar I:
The installation recommendations are for small residential panels of 25 sq. ft. or less. This method is not for use in constructing curved glass block walls. Interior and exterior panels must be framed on all four sides.

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Mortar II:
The installation recommendations are for interior or exterior residential panels larger than 25 sq. ft. This method may be used to install projects framed on two, three, or four sides. Using the Premiere Series – Panel size limitations – Interior (250 sq. ft. max) and Exterior (144 sq. ft. max.). Using the Thinline™ Series – Panel size limitations – Interior (150 sq. ft. max.) and Exterior (85 sq. ft. max.).

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Note: The joints of the Mortar I and Mortar II Systems utilize a traditional installation method using a mortar finish for the classic “grid” look. Glass block sealant should be used to seal the perimeter on both sides of the panel.

ProVantage I and ProVantage II

ProVantage® II Installation System (Channel Construction):
This method is used to install straight walls in 4-sided openings. In this method, glass block panels are installed in a perimeter channel. The maximum opening size for exterior panels is 50 square feet. The maximum opening size for interior panels is 85 square feet.

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ProVantage® II Installation System (Anchor Construction):
This method is used to install straight and 90° angled walls and straight walls framed on at least two sides. In this method, glass block panels are secured to the wall using special wall anchors. The maximum opening size for exterior panels is 50 square feet, framed on all four sides. The maximum opening size for interior panels is 85 square feet, framed on at least two sides. The joints of these panels can be finished with ProVantage®Glass Block Surface Grout. Sealant finishing can only be used on straight walls in 4-sided openings, and it is not recommended for wet environments.

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To learn more about installing ProVantage, see this Installation Video.

If you are considering remodeling or building a new home and want to better understand what Glass Block can offer, please call us at 800-635-1226. We have been designing and installing Glass Block for over 20 years in the New York and New Jersey area. We love to share our experience.

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