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Internet # 305051365

Model # 3214SI

Store SKU # 1003132353

31 in. x 13.5 in. x 3.125 in. Frameless Ice Pattern Non-Vented Glass Block Window

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  • Pre-assembled glass block replacement window
  • Glass blocks are ideal for basements, showers, bathrooms and more
  • Increase privacy, security, efficiency and appearance
  • View More Details
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Product Details

About This Product

Clearly Secure Glass Block Windows come fully assembled to fit a variety of opening sizes and can enhance the comfort and appearance of any room. Glass Blocks are a special building material made of glass and laid similarly to brick or concrete block. For residential purposes glass block windows are commonly used as a basement replacement window but are also ideal for bathrooms, kitchens, sidelights, transoms, garages and much more. They are easily installed in any residential or commercial masonry opening and can also be used in wood frame openings. Clearly Secure Glass block Windows are more difficult for would be thieves to penetrate and thus are considered a more secure alternative to traditional windows. Glass block windows are also considered more energy efficient when compared to traditional plate glass windows.


  • Thermal efficiency of glass block helps to reduce energy costs and helps keep homes comfortable
  • Enhance your homes security with these thick, break-resistant glass block that help keep out unwanted intruders
  • Soft crackled appearance of the ice glass block pattern provides a high level of distortion and privacy
  • 1.82 R-value helps reduce heat loss and condensation
  • Integrated 16 in. x 8 in. hopper vent features an insect screen on the exterior to help keep bugs outside
  • Glass block is an efficient sound barrier reducing outside noises and helping keep homes quiet
  • Natural light allowed in that brightens rooms while you gain privacy and eliminate the need for curtains
  • Versatile window solution that is great for basements, bathrooms, kitchens, garages and door sidelights
  • 10-years from date of purchase limited warranty against manufacturing defects
  • Return Policy

Product Information

Internet # 305051365

Model # 3214SI

Store SKU # 1003132353


Dimensions: H 13.50 in, W 31.00 in, D 3.125 in


Grid Width (in.)


Product Depth (in.)

3.125 in

Product Height (in.)

13.50 in

Product Width (in.)

31.00 in

Rough Opening Height (in.)

14 in

Rough Opening Width (in.)

31.5 in

Width (in.) x Height (in.)

31.00 x 13.50


Exterior Color/ Finish



No Additional Features

Frame Type

No Frame

Glass Pattern

Ice Pattern

Glass Type

Privacy Glass

Glazing Type


Grid Pattern

No Grid

Grille Type

No Grille


No Additional Items Included

Interior Color/Finish Family


Number of Grids

No Grid

Product Weight (lb.)

37.5 lb





Solar Heat Gain Coefficient




Window Handing

No Handing

Window Type


Window Use Type

New Construction, Replacement

Warranty / Certifications

Energy Star Qualified

Not Qualified

Manufacturer Warranty

10 year limted

Questions & Answers

Q:Can this be installed vertically, between studs in an interior wall?
by|Aug 14, 2023
1 Answer
Answer This Question

A:  Yes, as long as the window secured in place, then this can be installed vertically in an interior wall.

by|Aug 17, 2023
    Q:What is the U-factor for this window? Does it meet the MA energy code for windows?
    by|Jul 14, 2023
    1 Answer
    Answer This Question

    A:  These glass block panels are mostly comprised of glass blocks that have an individual U-Value of 0.53, however they have not been MA energy code rated.

    by|Jul 18, 2023
      Q:is this available with a nail fin?
      by|Apr 26, 2023
      1 Answer
      Answer This Question

      A:  Hi Dennis, this window does not come with a nail fin. If you'd like a nail fine with your glass block, then please consider the CrystaLok series glass block windows. The CrystaLok series offers select sizes of glass block panels with a nailing fin. Thank You!

      by|Apr 26, 2023
        Q:Can I install this window horizontally and vertically? Victor Escobar.
        by|Apr 13, 2023
        1 Answer
        Answer This Question

        A:  Yes, this window can be installed in either direction

        by|Apr 13, 2023
          Showing 1-4 of 14

          Customer Reviews

          4.7 out of 5

          • 4.7 out of 28 reviews
          • 100% recommend this product
          Filter by:
          Showing 1-10 of 28 reviews
          We got three of these to remodel our guest shower space. Still under construction but they look good so far. Our contractor likes them, and now plans to use them in his house as well. We ordered online so no customer support. Not available in our local store.
          • Verified Purchase
          Super Easy Installation
          Super easy to install and looks great on my 1952 home. I've had a lot of compliments. I installed 4 vented and two non-vented.
          • Verified Purchase
          • Recommended
          Best addition to my basement window well
          My wife and I have a 1940's house in old town Kennewick that have the original windows in the basement. We remodeled the master bedroom and I installed these glass block window. It not only made a great looking window with a a nice R factor, it let in outside light with keeping the private factor. I have 3 more windows to do and I will be ordering them. This work was done this month.
          • DIY
          • Verified Purchase
          • Recommended
          2 found this review helpful
          The size is wrong. They do look nice
          The true size of these windows are 31 x 13.5 x 3.1/8 not 32 x 14 x 3. Block depth not an issue but the rest is a problem. The video makes it look so easy, not so. But I am not installing them conventionally I have set them up on end so they are 13.5 x 31 x 3 1/8. (it's my kitchen window where the framing was not done by a pro and it is a picture window with 2 small side windows. The side windows are on hinges and work like shutters, they swing out. So instead of taking out a second mortgage to do the windows I decided that the glass block is nicer than what I got estimates for. And it is. When you lay the initial mortar on the bottom you need to let that set up a bit because when you place the window in it all oozes out. You need to have your shims in place prior to placing the window in, check for level and adjust your shims. You need shims all the way around when doing it the way I am: bottom, sides and top. I really wish I could have dry fitted before the helpers showed up but they are about 35 lbs, too much for me to lift. You need two people to do this, one inside and one outside. Probably a third to mix more mortar and hand over tools as needed. We spent too much time on the first window to be able to get the second one in. Hurricane is coming quickly. So next weekend we will be back at it. I am also doing the same in the living room, again same window framer. They will be bigger windows, I will call the company directly for exact measurements before I order. The picture is rough, but they will look great once the shims are out and the window frame is finished and painted.
          • DIY
          • Recommended
          7 found this review helpful
          • Verified Purchase
          This is going to look great in my bathroom remodel....
          This is going to look great in my bathroom remodel.
          • Verified Purchase
          Great windows
          I ordered 3 and had them installed. No problems and they look great.
          • Verified Purchase
          • Recommended
          • Verified Purchase
          They are clearer than the blocks they’re replacing....
          They are clearer than the blocks they’re replacing.
          • Verified Purchase
          • Verified Purchase
          Showing 1-10 of 28 reviews