Step-by-Step Guide: Installing a Glass Block Window

Table of Contents

1. Introduction
2. Problems with the Old Window
3. Installing a Window Well
4. Removing the Old Block
5. Removing the Existing Mortar
6. Preparing the Glass Block
7. Lining Up the Glass Block
8. Securing the Glass Block with Mortar
9. Cleaning Up and Finishing Touches
10. Conclusion

Installing a Glass Block Window

Installing a glass block window can be a great way to bring in natural light and improve the aesthetics of a room. However, the process can be overwhelming if you are unfamiliar with the steps involved. In this article, we will guide you through the process of installing a glass block window, taking into account important considerations and providing step-by-step instructions.

1️⃣ Introduction

Glass block windows offer several benefits, including enhanced privacy, improved insulation, and a unique visual appeal. Whether you are looking to replace an old window or install a new one, this article will provide you with all the necessary information to complete the project successfully.

2️⃣ Problems with the Old Window

Before diving into the installation process, it is essential to address the issues with the old window. In the case of our project, the old window had a broken pane and allowed cold air and bugs to enter the basement. Additionally, it was situated below ground level on a wall that experienced water infiltration during heavy rain.

3️⃣ Installing a Window Well

To prevent water infiltration, we started by installing a window well below the existing window. This involved excavating the area and adding a proper drainage system. By placing the window well lower than the window, we ensured that any water accumulation would not reach the interior.

4️⃣ Removing the Old Block

Before installing the new glass block, we needed to remove the old block. To avoid shattering the glass and causing a mess in the basement, we carefully wrapped the panes of the old window with a rag and gently tapped them with a hammer until they broke into manageable pieces. Once the glass was removed, we proceeded to pry out the metal frame of the old window.

5️⃣ Removing the Existing Mortar

Glass blocks are securely held in place with mortar. To ensure a strong bond between the new glass block and the window frame, it was necessary to remove the existing mortar. The glass blocks have concave sides that lock them into the mortar and adjacent blocks. By chipping away the old mortar, we created a clean surface for the new glass block and prepared for a fresh application of mortar.

6️⃣ Preparing the Glass Block

To support the glass block while the mortar dried, we fashioned two spacers from pressure-treated wood. These spacers were placed below the glass block to ensure the correct height before cementing them to the window frame. We used glass block mortar mix, a weather-resistant material with waterproofing additives, and a working time of approximately 60 minutes.

7️⃣ Lining Up the Glass Block

With the spacers in place, we applied the mortar underneath the glass block and set it in position. To fill the gaps and create a secure bond, we used the cake decorating bag technique, which involved squeezing the mortar into the concave spaces between the glass block and adjacent blocks. Alternatively, a small trowel or tongue depressor could be used to achieve the same result.

8️⃣ Securing the Glass Block with Mortar

Once the mortar was applied, both inside and outside the glass block, we smoothed it out with a damp sponge, being careful not to touch the mortar directly. The sponge helped clean up any excess mortar, leaving a tidy finish. In case of any mistakes or imperfections, fresh mortar could be added while the existing mortar was still soft.

9️⃣ Cleaning Up and Finishing Touches

After the mortar had set, we removed any residue on the glass block and window frame. This process could be done easily with a damp cloth or sponge. The final result should be a clean window with a secure and well-insulated glass block.

🔟 Conclusion

Installing a glass block window requires careful preparation and attention to detail. By following the steps outlined in this article, you can successfully replace or install a glass block window in your own home. Enjoy the improved aesthetics, natural light, and insulation benefits it brings!