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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon124
    Verified glass block window services reviews

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

Castle The Window People Mid Atlantic
New to Angi
Glass Blocks - InstallGlass Blocks - Install - For Business

Serving Cornwall, PA and surrounding areas

Approved

In business since 1991

Free estimates

Credit card accepted

Castle The Window People is the right combination of qualities to make us the best choice for your next window or door project. History: that shows our success has been sustained over decades. Buying power: we leverage our buying power to deliver the highest quality products at the best price and we provide great value. Business model: our focus is on windows and doors and we may be the most seasoned experienced professionals in the industry. Our focused experience allows us to confidently say we are window and door experts. Product and solutions: our products windows and doors are high performing, well installed, good quality windows and doors. Customer protection: we are home to the only true lifetime guarantee in the industry. Putting it all together we believe we are the best choice for your next window and or door project.

68 neighbors recently requested a quote
Avatar for Castle "The Window People"
Castle "The Window People"
3.5(
172
)
Stained or Specialty Glass - Install or ReplaceStained or Specialty Glass - Repair

Serving Cornwall, PA and surrounding areas

In business since 1977

Free estimates

Emergency services offered

"

Everything went well.  Workers came and cleaned up.  No problems with installation.

If you want your windows done, call them.  If you are "thinking about it".  Don't call.  They will call you daily afterwards.  I had to block them from my phone as they continue to call me every 2 days for what I don't know.  Work was well but the phone calls are annoying.  

"
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Recommended by70%of homeowners
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Glass Block Windows FAQs, answered by experts

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. 

Glass block windows typically last for 15 to 30 years, which is slightly less than the 20- to 50-year lifespan of standard windows. You can extend their life by resealing them every few years. Professional installation is also key to ensuring the windows are placed correctly and will function properly for years to come. A professional installer will have the necessary skills, tools, and knowledge to install these features and can identify potential issues like damaged frames or cramped areas during a consultation.

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

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

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.

The Cornwall, PA homeowners’ guide to glass block window services

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