How to Install Sliding Glass Door in Block Wall

A sliding glass door is a great way to bring the outside in. They are easy to install and can be used for doors that open into or out of your home. This blog post will help you learn how to install sliding glass door in block wall. You can easily let fresh air come indoors or enjoy watching nature from your bedroom with just the touch of a button!

Sliding windows are also very convenient because they take up less floor space than traditional windows, which means you have more room for furniture inside or even on your porch! If you’re interested in installing this type of window, this article will cover everything from installing the track to sealing up the walls to ensure no drafts have been held. Read on to know more!

How to Install Sliding Glass Door in Block Wall

Summary: In order to install a sliding glass door in a block wall, it is necessary to first remove the existing drywall and insulation. Next, use a saw to cut a hole in the block wall large enough for the door to fit through. Finally, use a jigsaw to trim the hole to the correct size and fit the door into place.

5 Types of Seals for Sliding Glass Door

1. Weather-Resistant Sealant

Besides applying weather-resistant sealant, you can make your sliding glass doors durable by using metal mesh to reinforce the borders where they meet dirt and moisture sources. This will protect them from damage due to rusting or corrosion in precast, cast, or post-tensioned concrete.

2. Sill Sealer

The sill seal, a horizontal strip connecting the bottom of a door with a threshold, is an essential part of preventing water penetration around your sliding glass doors. It also helps to stabilize the sliding glass door by absorbing all the excessive vibrations occurring due to air movement before they reach the sliding door.

3. Stop Mold

Your sliding glass doors come with a bottom rail and top track, which helps to seal your sliding door tightly against dirt, water, and air infiltration. However, what happens is that over time, due to exposure to continuous changes in moisture content and temperature, these tracks show signs of rusting or corrosion and can no longer maintain their original sealing capacity.

4. Caulking Sealer

Caulking is the most common form of sliding glass doors sealant used in any weather, withstanding extreme variations in temperature and moisture levels. It’s also necessary to use dual-purpose caulk to dry out over time and fail to prevent water seepage.

5. Rubber Weatherseal

Most sliding glass doors are fitted with a rubber weather seal at the bottom of the door to keep out moisture and dirt from entering your home. Over time, these seals usually become warped or lose their elasticity after exposure to constant changes in temperature and humidity levels as it gets old.

Sliding Glass Doors Are Fitted With a Rubber Weather Seal

5 Things You Must Know Before Installing Sliding Glass Door in Block Wall:

1. The size of the block wall should be 16″ since this is the standard size of the glass door’s frame. This means that if you try to install a glass door where it doesn’t fit, some parts will show and may affect its stability, mainly when it’s used several times.

2. Since the width of a single block wall is 12″, you need a double block wall with the same size of 16″ for it to be installed properly.

3. If your home has an interior design using wood materials, this may affect the possibility of installing a sliding glass door in the block wall since it requires more than just one layer or type of material. You can still use the glass door, but you need to be careful with it primarily when a professional installer installs it.

4. If you’re going to install a sliding glass door, your house may be heavy on its foundation because of the weight that will be added to its partition. Therefore, there should be at least 18″ between the block wall and the top of the foundation.

5. You can’t just rely on a single block wall to hold or hold up your house’s weight since you have to be sure that it will work together with other systems supporting your house for safety purposes.

10 Ways on How to Install Sliding Glass Door in Block Wall:

1. Framing

Framing of block wall must be done before the installation of sliding glass door begins. There are two ways to frame the opening for the sliding glass doors in the block wall. The first way is by cutting out a hole in the exterior layer of blocks right above the course where framing will be installed. If the interior wall is being cut, then it can be done by making the opening of the block wall two courses high.

Cutting Out a Hole in the Exterior Layer of Blocks

2. Add Headers

Add headers at the top and bottom of openings. The header for the top will be installed above the exterior layer of blocks, while the one for the bottom will be built right below it. Use metal lath or wire mesh to reinforce both frames (top and bottom) with concrete.

3. Framing with Metal Lath

Framing for the opening must be made slanted towards the top. Place metal lath where the structure will be located, then fill it with concrete to secure it in place. Secure metal lath near its middle by fixing it to a piece of wood or metal stilts.

4. Install the Glass Sliding Door

Install glass sliding door with track and guides to the opening. Place a weather-resistant seal on it so that dirt and moisture will not damage doors frames, thus enhancing its longevity. Make sure you follow the manufacturer’s instructions for proper installation procedures.

5. Galvanized hardware

Galvanized hardware for the sliding glass door must be applied to the wall beside the opening. Please do not use more than five pieces of hardware on the wall, and make sure they are all equal distances apart. Drill holes for mounting metal brackets to the block wall.

6. Secure Hardware in Place

Secure all hardware in place by using a power screwdriver or impact driver with screws that have washers attached to their heads. Make sure both ends of the screws fasten to metal brackets.

7. Caulking and Trimming

Caulk all edges of these sliding glass doors to prevent dirt and moisture from entering through cracks. Finish off by trimming the caulk flush with surrounding surfaces of blocks where needed.

8. Mounting Track and Brackets

Mount the track above the opening after installing sliding glass doors. Fasten brackets to the top and bottom of the exterior layer of blocks where framing was done earlier. Set the sliding door in place and secure it by clipping brackets, or other types of hardware, to raised portions of the track. Seal all sides with caulk to prevent moisture from entering the area.

9. Installing Weather-Resistant Sealant

Apply weather-resistant sealant all over the edges of the sliding glass doors where they meet track. Make sure you follow instructions on your manufacturer’s packaging for best results, and do not apply too much sealant, or else it may seep out from the sides of the doors.

Stucco Can Be Applied to Secure Sliding Glass Doors

10. Finishing Touches

Apply to finish touches to the exterior walls. If you prefer, stucco can be applied to secure sliding glass doors but make sure you apply a layer of metal mesh across the door’s top edge before pouring on cement for reinforcement.


You can install a sliding glass door in the block wall by following these steps. First, measure the height and width of the opening to determine how many blocks need to be removed from each side. Next, remove any mortar between the bricks on either end of the opening with a chisel or hammer, and then pry them out carefully using a crowbar or screwdriver.

Fill in all holes created by removing brick material, including around electrical outlets if necessary, before proceeding with installing your new sliding glass door hardware system. We hope this blog post on how to install sliding glass door in block walls has been helpful. If you have questions about installation or would like to share your experiences, we invite you to leave a comment.

Jennifer Branett
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