By Gene and Katie Hamilton
You can usually find glass block window installers through the retailer where you buy the glass block because they offer Installed Sales, a service where they manage the job and guarantee your satisfaction. If you buy the window from a manufacturer's website there is often an installer locator, a contractor in your area who is a recommended and familiar with installing the unit.
A carpenter has the skills and tools to install a glass block window. Many are on the staff of a general contractor, window installation service and remodeling company or work as an independent contractor. You might find glass block specialists listed in the Yellow Pages as "Glass Block - Structural" and they're often associated with a tile and brick company who employs masons.
You can go online and use a contractor referral service or type "glass block window in (your city)" in a search engine like Bing, Google or Yahoo!.
Individual glass blocks are three inches wide and eight inches square (3x8x8"). Standard pre-constructed window sizes start with four blocks (16x16"), and can be square or rectangular with as many as six or eight blocks on a side (check with your supplier). Custom sizes also may be ordered. Vinyl frame color choices are usually white and a neutral shade such as tan. The three most popular glass block patterns include: obscure (a slightly wavy or distorted face that allows maximum natural light with good privacy); diamond cut (a geometric pattern that also allows maximum light with maximum privacy); and frosted (maximum privacy, but somewhat less light transmission). All glass blocks are hollow, with the patterns on their interior sides and smooth exterior faces.