Ethan Clarke
Plastic sheeting is often used as a vapour barrier to protect brick walls from water damage. Before attaching the plastic, it is important to clean the wall with a mixture of water and trisodium phosphate, removing any mould, grease, or sand. The next step is to cut the plastic sheeting to size, using scissors or a utility knife. When attaching the plastic to the wall, some opt for an adhesive, while others use nails. For example, construction adhesive can be applied in zigzags or waves, and the plastic is then pressed to the wall, starting at the top corner. Nails can also be used, with one source recommending masonry nails placed approximately every 6 inches. Another suggestion is to use liquid nails, although one source noted that the plastic peeled off the wall after a week.
| Characteristics | Values |
|---|---|
| Clean the wall | Mix water and trisodium phosphate, or TSP, in a bucket. Dip a scrub brush into the mixture and scrub the wall thoroughly. Rinse the bucket and fill it with clean water. Dip a sponge or cloth into the clean water, wipe down the wall, and let it dry. |
| Prepare the plastic | Measure the space you need to cover, adding 6-8 inches to each length for overlapping. Roll out the plastic and trace your measurements with a marker. Cut the plastic with a utility knife or scissors, cutting around extrusions like windows and pipes. |
| Adhesive | Apply construction adhesive to the wall in short zigzags or waves. Press the plastic to the wall, starting at the top corner and moving across and down, keeping the plastic tight and smooth. |
| Nails | Use masonry nails approximately every 6 inches. Nail galvanized flashing or alkaline copper quaternary pressure-treated furring strips along the edges of the plastic. |
| Tape | Apply sheathing tape to the edges where two pieces of plastic meet. Overlap the sheets and tape the edges together. |
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What You'll Learn
Clean the brick wall thoroughly
Before attaching plastic sheeting to a brick wall, it is essential to clean the wall thoroughly. This will ensure that the plastic adheres securely to the surface. Here are the steps you should follow to clean a brick wall thoroughly:
Firstly, remove any furniture or items from the area to ensure you have enough space to work. This is especially important if you are cleaning brick flooring. For interior brick walls, it is recommended to vacuum or sweep the area to remove any excess dust or debris. If you are cleaning an exterior brick wall, you may need to trim back any nearby landscaping, such as shrubs or flowers, to access the wall easily.
Next, prepare the cleaning solution. If the brick wall is heavily soiled with grease, oil stains, rust markings, or mineral deposits, you may need to use a specialised cleaner or degreaser. For exterior walls, a mixture of bleach and water can be effective. Alternatively, a mild acid such as white vinegar can be used to dissolve dirt and stains without causing discolouration or damage to the brick. Always test the cleaning solution on a small area first to ensure it is safe for the brick surface.
Once you have prepared the cleaning solution, apply it to the wall. You can use a spray bottle to apply the solution evenly or sponge it onto the wall. Allow the solution to sit for a few minutes to loosen and penetrate tough dirt and stains. For interior brick walls, you can use a gentle cleaner, such as warm water and dish soap, applied with a grout sponge.
After the cleaning solution has had time to work, use a brush to scrub the wall gently. A nylon-bristled brush is suitable for most brick walls. If the brick has heavy stains or dirt, you may need to use a stiffer brush. Rinse the brush frequently in clean water to avoid redistributing dirt onto the wall.
Finally, rinse the wall thoroughly with clean water to remove any residue from the cleaning solution. You can use a sponge, cloth, or hose to rinse the wall. Ensure that all traces of the cleaning solution are removed. Allow the brick wall to dry completely before proceeding to attach the plastic sheeting.
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Apply construction adhesive in zigzags
When attaching plastic sheeting to brick, one of the methods you can use is construction adhesive. This method can keep the plastic securely fastened on its own if the wall is thoroughly cleaned beforehand.
To begin, you'll want to apply the adhesive in short zigzags or waves. Start by applying a thick bead of adhesive along the top edge of the wall and work your way down. Make sure to also apply adhesive around any locations where you've cut holes in the plastic, such as for windows or pipes.
The next step is to press the plastic to the wall. Start at one of the top corners, stretching the plastic and keeping it tight and smooth as you move across and then down.
If you want to further secure the plastic, you can nail galvanized flashing or alkaline copper quaternary pressure-treated furring strips along the edges. Additionally, if you're using multiple pieces of plastic, overlap one sheet over the other and use sheathing tape to secure the edges.
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Use masonry nails for extra support
Before attaching plastic sheeting to brick, it is important to prepare the surface. Wash the brick with a mixture of water and trisodium phosphate, or TSP, to remove any mould, grease, or sand. Then, rinse and wipe down the brick with a sponge or cloth, and let it dry completely. Before purchasing your plastic sheeting, be sure to measure the space you need to cover, adding 6 to 8 inches to each length to allow for overlapping.
Once the brick surface is prepared and you have the appropriately sized plastic sheeting, you can begin the process of attachment. One effective method is to use masonry nails for a secure hold. Place the nails approximately every 6 inches along the brick, ensuring that they penetrate through the plastic sheeting and into the brick. You can also apply sheathing tape to the edges where two pieces of plastic meet, creating a sealed edge. Overlap one sheet over the other by a few inches, then tape the edge of the top sheet to the bottom sheet. This will help to ensure that the plastic sheeting is securely attached to the brick and provide extra protection against moisture and other elements.
In addition to using masonry nails, you can also use nailed baton lengths on top of the poly sheet to further secure it in place. This method has been used successfully for many years and provides a temporary solution if you need to remove the plastic sheeting in the future. Another option is to use construction adhesive along with the nails. Apply a thick bead of adhesive along the top edge of the brick and work your way down, using short zigzags or waves. This will create a strong bond between the plastic sheeting and the brick, providing extra support and ensuring that the sheeting remains attached for a longer period.
When using masonry nails to attach plastic sheeting to brick, it is important to consider the type and thickness of the plastic. Thicker plastic, such as 6-mil plastic, may require more nails or additional adhesive to ensure a secure hold. Additionally, the type of brick and the evenness of the surface can also impact the effectiveness of the nails. If the brick is rough or uneven, it may be more challenging to achieve a strong hold with nails alone. In such cases, combining the use of nails with adhesive or taped edges can provide a more durable solution.
Using masonry nails for attaching plastic sheeting to brick offers several advantages. Firstly, it provides extra support and strength to the attachment, reducing the risk of the sheeting peeling off or coming loose over time. Secondly, nails create a more permanent solution compared to adhesive or tape alone, which may degrade or lose their effectiveness in certain environmental conditions. Lastly, masonry nails are relatively easy to use and can be placed strategically to achieve a secure and aesthetically pleasing result. However, it is important to consider the potential drawbacks, such as the risk of damaging the plastic sheeting during nail installation and the difficulty in removing the nails if the sheeting needs to be replaced or removed in the future.
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Seal with tape
When attaching plastic sheeting to a brick surface, using tape is a simple and effective method that creates a strong and secure seal. Start by cleaning the brick surface to ensure it is free of dust, debris, and any substances that may hinder the tape's adhesion. Use a brush or a vacuum to remove loose particles and, if necessary, wipe the bricks with a damp cloth to ensure a clean, dry surface. Choose a tape suitable for this purpose, such as a heavy-duty, double-sided tape designed for construction or exterior use. Look for a tape with strong adhesive that can withstand varying temperatures and moisture, ensuring it can create a durable seal between the plastic and the brick. Ensure the plastic sheeting is cut to size and laid out flat, then peel back a small section of the tape's backing and carefully align and press the tape onto the brick surface, working in small sections to ensure a smooth application. Use a roller or your hand to firmly press the tape onto the bricks, working from the center outwards to remove any air bubbles and create a strong bond.
Once the tape is securely attached to the brick, remove the remaining backing to expose the adhesive side. Carefully align the plastic sheeting with the tape, starting from one corner and working your way across, ensuring a straight application. Press the plastic sheeting firmly onto the tape, using a roller or your hand to smooth out any air bubbles and create a strong seal. Pay particular attention to the edges and ensure the plastic is securely adhered to the tape, with no gaps or lifting. For added security and to ensure a long-lasting seal, consider using a waterproof caulk or sealant along the edges of the plastic sheeting. This will help protect against moisture and weather damage and create a more permanent solution.
Use a suitable caulk or sealant designed for exterior use and apply it with a steady hand, ensuring a thin, even bead along the edges where the plastic meets the brick. Smooth out the caulk with your finger or a damp cloth for a neat finish. This extra step will provide peace of mind, especially if the plastic sheeting is being used for a long-term application or in an area exposed to the elements. When applying the tape, work slowly and methodically, especially when attaching the plastic sheeting to the tape. It is important to take your time to ensure accurate alignment and a smooth finish, free from wrinkles or air bubbles. Working slowly will also help you manage the process, allowing you to adjust and correct the plastic sheeting's position as needed.
Finally, for hard-to-reach areas or when working on a large project, consider using a scaffold or ladder to safely access higher areas. It is important to plan and prepare for these situations to ensure a safe and efficient process. Using tape to attach plastic sheeting to brick is a straightforward method that can be completed with careful preparation and a systematic approach. With the right tools and attention to detail, you can achieve a strong and secure seal, protecting the area as needed.
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Cut plastic with a utility knife
Cutting plastic with a utility knife is a straightforward process, but it requires careful preparation and attention to safety. Here is a detailed guide:
Prepare the Plastic Sheet
Before cutting the plastic, it is essential to determine the required size and shape. Measure the area you need to cover, adding 6 to 8 inches to each length to allow for overlapping. Mark these measurements on the plastic sheet using a marker or another suitable tool. Ensure the plastic is laid out flat and secure before beginning to cut.
Using the Utility Knife
Utility knives, also known as hobby knives, are effective tools for cutting plastic. They can be purchased from craft stores or hardware retailers. When cutting, hold the knife firmly and use a steady motion. Cut along the marked lines on the plastic, taking care to follow the measurements accurately. If you need to cut around obstructions like windows or pipes, hold the plastic against the wall and cut around these features with the knife. For thick plastic, it is recommended to drill small holes along the cutting line and then use the knife to slice through the remaining material. This technique reduces the strain on the knife and helps maintain the integrity of the plastic.
Safety Precautions
Always exercise caution when handling a utility knife. Ensure you have a steady grip and cut away from your body. Keep the knife blade sharp, as a dull blade can increase the risk of slipping and cause uneven cuts. Wear protective gear, such as gloves and safety goggles, to shield your hands and eyes from any sharp fragments or debris.
Additional Tips
For a neater finish and to ensure the plastic adheres securely, apply construction adhesive along the edges of the plastic sheet, especially around any cut-out holes. Overlap the sheets and use sheathing tape to join them together, creating a continuous barrier. If necessary, you can further reinforce the plastic by nailing galvanized flashing or alkaline copper quaternary pressure-treated furring strips along the edges.
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Frequently asked questions
There are several ways to attach plastic sheeting to brick. One way is to use construction adhesive. Apply the adhesive in short zigzags or waves along the top edge of the brick wall and work your way downwards. You can also use masonry nails, especially at the edges where two pieces of plastic meet. Overlap one sheet over the other and then tape the edge of the top sheet to the bottom sheet.
It is recommended to use construction adhesive to attach plastic sheeting to brick. Make sure to clean the brick wall thoroughly before applying the adhesive to ensure that the plastic will stick securely.
When attaching plastic sheeting to brick, it is recommended to use masonry nails. Space the nails out approximately every 6 inches. You can also nail galvanized flashing or alkaline copper quaternary pressure-treated furring strips along the edges of the plastic to further secure it in place.
While tape may not provide a strong enough seal on its own, it can be used in combination with nails. Apply duct tape to the brick in various places and then nail through those places to hold the plastic sheeting in place.
