Model # S4426DP

Internet #203519805

Store SO SKU #1000369491

Pittsburgh Corning 42.5 in. x 25.5 in. x 3 in. GuardWise Delphi Pattern Solid Glass Block Window

Discontinued Pittsburgh Corning

42.5 in. x 25.5 in. x 3 in. GuardWise Delphi Pattern Solid Glass Block Window

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Frequently Bought Together

Product Overview

Designer Deplhi pattern offers maximum privacy with maximum light transmission. Pittsburgh Corning GuardWise windows are made from the highest quality made glass block. Eliminates the need for storm windows, reduce heating and air-conditioning costs. No painting or caulking required with nothing to peel, rot or rust. These windows use natural light to produce beautiful and dramatic effects in your home. Enhance your home with an efficient sound barrier, safe and secure glass block window.

  • The delphi pattern provides maximum light transmission and maximum privacy
  • 100% Real glass
  • Easy to install
  • Break-resistant glass provides security and privacy
  • 10-Year warranty
  • The Delphi pattern provides maximum light transmission and maximum privacy

Info & Guides

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Grid Width (in.)
Jamb Depth (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)
Rough Opening Height (In.)
25.75 in
Rough Opening Width (In.)
43.25 in


Design Pattern
Exterior Color/Finish Family
Privacy Glass
Frame Material
Frame Material
Glazing Type
Grid Pattern
Hardware Color/Finish Family
Interior Color/Finish Family
Lock Type
Number of Locks
Product Weight (lb.)
Solar Heat Gain Coefficient
Window Features
Window Type
Glass Block
Window Use Type
New Construction,Replacement

Warranty / Certifications

Energy Star Qualified
Not Qualified
Manufacturer Warranty
10 years

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Customer Questions & Answers

how are windows installed and held in place?

How does one seal the outside perimeter edge to be waterproof?
Asked by: geet
Mortar the sill (bottom), insert window into opening making plumb and level, Wedge to hold in place. Fill both jambs (sides) with mortar. Remove wedges and insert expansion material at head (top) and finish the head joint with caulk/sealant.
Answered by: PittsburghCorning
Date published: 2016-06-13


This window says the EXTERIOR COLOR/FINISH FAMILY come in green or white. What is colored that is actually visible? We would prefer green for the exterior, but white for the interior. Any pictures that show the color?
Asked by: Joel
The "color" field needs to be filled in on the website. "Green" is used as the color because any iron content in the sand used to create the glass can cause a green tint in the glass. We remove as much iron content as possible to make our glass as clear as possible.
Answered by: PittsburghCorning
Date published: 2015-09-20

Can this be used in my application?

I have a recessed window that I want to tile in on all 4 sides, and put this glass block window inside. Is that a possibility with this? It would be an inside application with no outdoors exposure. Would I just silicone it in, or how would I adequately secure it in place? Are any instructions available online?
Asked by: thomastx
Yes. Standard installation is to mortar the sill, place the panel into the opening, make sure it is plumb and level, mortar both sides and then use expansion material across the top and caulk the top joint. If installing into a wood opening, panel should be secured in place by installing a "stop" around the perimeter on both sides or by nailing metal nail ties to the wood before applying the mortar. Instructions are included with the window (on the protective sleeves).
Answered by: PittsburghCorningTechExpert
Date published: 2015-09-17

model s3016dp glass block

Is this block available in size 28.75 x19.5 and for how much?
Asked by: Anonymous
Thank you for your recent inquiry with The Home Depot. Yes, this item does come in that size. The price is $120.79 / each. For any other questions, please call us at Customer Service 800-430-3376.
Answered by: Anonymous
Date published: 2015-09-17
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Customer Reviews

42.5 in. x 25.5 in. x 3 in. GuardWise Delphi Pattern Solid Glass Block Window is rated 4.5 out of 5 by 2.
Rated 5 out of 5 by from cheap, easy and very nice Really like it. put it in as a window in a shower stall and it looks great.
Date published: 2015-11-18
Rated 4 out of 5 by from Nice looking window Nice looking window. Very heavy, but solid. Could use better instructions.
Date published: 2013-10-17
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