How to build a glass block partition wall?

Glass block partition walls are a stylish way to separate spaces in your home or office. They allow natural light to pass through while providing privacy and insulation. Building a glass block wall is a fairly straightforward DIY project that can be completed in a weekend.

What is a Glass Block Partition Wall?

A glass block partition wall is a non-load bearing interior wall made from glass blocks. The glass blocks are assembled into a frame and mortared in place. Glass blocks are available in a variety of sizes, colors, and patterns to fit your design aesthetic.

Compared to drywall or other materials, glass block walls have some advantages:

• Allow natural light to pass through
• Provide privacy while still allowing light through
• Insulate against noise and temperature changes
• Durable and low maintenance
• Stylish, unique look

Glass block walls are commonly used to separate:

• Bathrooms
• Kitchens
• Living spaces
• Indoor pools or hot tubs
• Basements
• Garages
• Offices or conference rooms

Tools and Materials Needed

Building a glass block wall is not difficult for a DIYer. You’ll need the following tools and materials:

Tools

• Safety glasses
• Gloves
• Tape measure
• Level
• Trowel
• Mortar paddle mixing tool
• Bucket or wheelbarrow
• Rubber mallet
• Sponge

Materials

• Glass blocks – calculate how many you need based on the wall size
• Mortar – premixed or mix portland cement, sand, and hydrated lime
• Reinforcing wire mesh
• Metal wall ties
• Foam spacer pads
• Silicone caulk
• Wood trim

How to Build a Glass Block Partition Wall

Follow these steps to build your own glass block wall:

Step 1: Plan the Size and Layout

Measure the area where you want to install the glass block wall and draw up plans showing the wall size and layout. Most glass blocks are 3 3/4″ x 7 5/8″, so plan your measurements based on the blocks dimensions.

Determine if you need any openings in the wall for doors or access. Also decide if you want a decorative pattern or color effect with the blocks.

Step 2: Build the Frame

Construct a wooden frame to support the perimeter of the wall. Use 2×4 or 2×6 lumber secured to the floor and ceiling. The frame should be plumb and square.

Install a reinforced bottom plate that spans two floor joists using construction adhesive and screws.

Step 3: Add the Wall Anchors

Attach galvanized steel wall ties at each stud location along the frame. These help anchor the wall to the surrounding structure.

You’ll mortar directly over these ties when you install the blocks.

Step 4: Insert the Reinforcing Mesh

Cut reinforcing wire mesh to size and place it inside the frame. This helps strengthen the wall and prevent cracking.

Use wire snips to remove mesh where you need openings. Make the mesh openings about 2 inches smaller than the clear opening size.

Step 5: Apply the Base Mortar Bed

Mix the mortar according to the manufacturer’s instructions. Start by making enough to apply a 1-2 inch base layer over the frame and mesh.

Spread the mortar using a trowel to create a smooth, level surface. Let it begin curing before the next step.

Step 6: Install the Bottom Row

Once the base layer has become tacky to the touch, you can start installing blocks.

Apply mortar to the bottom edge of the first row of blocks with a trowel. Set them in place on the base, pressing gently to adhere.

Use spacers between the blocks for consistent 1/4″ joints. Let the mortar set up before continuing.

Step 7: Mortar the Vertical Joints

Once the bottom row is secured, apply mortar to the vertical edges where the next row will contact it. This mortars the blocks both horizontally and vertically.

Continue laying rows of blocks, working either from bottom to top or both sides towards the middle. Tap blocks gently with a mallet to level.

Step 8: Finish the Joints

Once all blocks are installed, let the mortar fully cure for about 48 hours. Mix up a batch of mortar and trowel it into the joints between blocks to create a smooth finish.

Remove any smears or excess mortar with a damp sponge. Let the joints cure completely.

Step 9: Caulk and Trim

Run a flexible silicone caulk bead along all joints where the wall meets another surface. This prevents leakage.

Finish the wall ends with wood trim along the perimeter to give it a polished look. Maintain expansion gaps between the trim and wall.

Step 10: Seal and Enjoy

Your new glass block wall is ready to divide and decorate your space! Seal the glass block surface with a specialty glass block sealer to protect its translucency.

Then stand back and admire the beautiful way it filters light through your home or office. Enjoy your stylish new architectural feature.

Tips for Success

Follow these tips to ensure your project goes smoothly:

• Choose smaller glass block sizes for easier handling
• Wear gloves and safety glasses when cutting mesh or mortaring
• Keep mortar mixtures consistent from batch to batch
• Work in a “U” shape laying blocks from both ends towards the middle
• Tap blocks gently with a mallet to fit them flush together
• Let mortar fully cure before applying finish mortar to joints
• Seal the surface to maintain the glass block transparency

Cost to Build a Glass Block Wall

The total cost to build a glass block wall will depend on:

• The size of the wall
• Number of blocks needed
• Type of blocks chosen – patterned blocks cost more
• Accessories like trim and borrowed light panels
• Whether you DIY or hire a contractor

On average, expect to pay:

• Glass blocks: $5 – $20 per square foot
• Mortar, caulk, and tools: $75 – $200
• Contractor installation: $50 – $100 per hour

For a 5′ x 8′ glass block wall using standard blocks, your total costs may range from $750 – $1,500 depending on whether you DIY or hire a pro.

More intricate or larger walls can cost $6,000 to $10,000 or more installed. Get quotes from contractors in your area for exact pricing.

FAQs

Get answers to common questions about building glass block walls:

Can you install a glass block wall yourself?

Yes, with the right materials and basic DIY skills, you can definitely install a glass block partition wall in your home. Follow the steps outlined in this guide for a successful DIY project.

How thick should the mortar joints be?

Mortar joints between glass blocks should be a consistent 1/4 inch thickness. Joints wider than 5/16 inch can compromise the stability and strength of the wall.

What type of mortar should be used?

Use Type S or Type N mortar designed for glass block installation. Do not substitute with Types M or O which are too strong and can crack the glass.

Should the wall be reinforced?

Yes, reinforce glass block walls with wire mesh or rebar to prevent cracking and add shear strength, especially for larger installations.

Can you change existing walls to glass block?

It’s possible to retrofit wood or drywall walls with glass block. The existing stud framing is normally suitable to support a new glass wall. Simply remove wall coverings and install as new construction.

How much weight can a glass block wall hold?

Glass block walls support minimal weight and are non-load bearing. They cannot support shelves, upper floor loads, or other heavy objects. Limit weight to 5 pounds per square foot or less.

Conclusion

Installing your own glass block partition wall is an achievable weekend project with the right preparation. Follow the steps outlined here to create a stable, durable, and beautiful divider.

Glass block walls require some specialized tools and materials, but provide a stylish payoff. With meticulous attention to detail, your new wall will turn out flawlessly translucence.

If taking on the full project seems daunting, consider hiring a professional mason for the install. Their experience can ensure your wall meets optimal standards.

Either DIY or hired out, a glass block partition wall is sure to infuse your home with elegant, filtered light for years to come.