The critical component of cinder blocks is different from concrete blocks; both are made of the same essential ingredients, but each is tailored for a specific purpose. In addition to concrete cinder blocks, coal cinders are mixed. Concrete blocks are heavier than cinder blocks. Concrete and cinder blocks are made with open cells reinforced with metal reinforcement or extra concrete for better strength. It is much more vital to use concrete blocks rather than cinder blocks. Some building codes expressly require that cinder blocks be used in construction projects.
In contrast to cinder blocks, concrete is a two-dimensional construct usually made from steel, wood, or cement. Coal cinder blocks are hollow rectangles typically made from concrete and coal cinders. A few essential tools make painting cinder block walls easy. They’re a common feature in basements and garages, but they often look overly industrial or unfinished.
Painting Cinder Block Walls
You can ensure a smooth painting process and the results you want by following the following six steps:
- Prepare your supplies
- Clean your wall
- Fill in any cracks
- Seal or paint
- The first coat of paint
- Apply a second coat
Check out our step-by-step guide to painting cinder blocks for more information.
6 Steps to Painting Cinder Blocks
It might take some time to paint cinder block surfaces, but it isn’t as difficult as it seems. We’ll go into more detail about the six steps that will result in a smooth, long-lasting paint job.
Step 1: Prepare your supplies
A successful cinder block wall painting project requires the right supplies, as with any other home improvement project. Here are the tools and materials you’ll need:
- A pressure washer
- A wire brush
- An acrylic caulk
- A putty knife
- An adhesive tape
- A drop cloth
- A paintbrush
- Sealer or primer for concrete
- Paint for masonry or house Exterior latex paint
Some of these supplies may not be needed, and that’s okay. Having more materials is better than having fewer.
Step 2: Clean your wall
It’s time to prepare your work surface after you’ve collected the necessary materials. Remove any paint residue from previous coats. Once you’ve cleaned the surface thoroughly, it’s time to prepare your surface. Both old paint and dirt can be removed from walls using a power washer. Scrub any wall sections that are problematic with the wire brush.
If a power washer is not available, start by wiping the wall with a dry rag. By doing so, loose dust and dirt will be removed. Next, fill a bucket with soapy water and clean the area. Using a scrub brush, clean the area where you want to paint. Take a break between this step and the next to allow the wall to dry completely. It may be best to dedicate an entire day to this step and let the area dry overnight. A dehumidifier can speed up the process if working in an enclosed space.
Step 3: Fill in any cracks
Check your wall for cracks after it has dried. If none appear, that is excellent news. Go ahead and brush it. This is where a putty knife and acrylic caulk are needed. Caulk any large cracks, then use the putty knife to smooth the caulk flush against the wall. Allow the caulk to dry.
Apply more caulk and smooth it down if the caulk shrinks or pulls away from the crack edges after it dries. Could you wait until it dries? Cosmetic cracks differ from structural cracks. A professional should be consulted if you are concerned about the wall’s stability, especially the part of a building’s foundation. You can ask them to inspect the wall and find out more.
Step 4: Seal or paint
It’s time to seal or prime the cinder blocks after you’ve made sure the wall itself and any caulk you’ve applied are dry. This step is imperative, so don’t skip it. Concrete can hold moisture because it is porous.
When you paint cinder blocks without sealing them first, moisture can damage the paint you’re going to apply. Consider whether you’re in an area where you’d like to avoid paint drips and streaks before you begin. In that case, tape the edges of the site you’re painting. Spread a drop cloth over the site. Apply a thin coat of concrete primer or concrete sealer to the wall to finish the job. Make sure the primer or sealer is specifically designed for concrete.
It is easier to apply a smooth coat of primer when you use a broad paintbrush. The amount of time it takes a sealer or primer to dry depends on the brand you choose and how thick you apply a coat. Be sure to follow the directions provided by the sealer you purchased. Primers should dry within four hours. That means you should take another break. Even though you won’t want to drag the painting process out longer than necessary, you might find that leaving the sealer or primer to dry overnight is the best option.
Step 5: The first coat of paint
Here we are, finally, at the painting stage. Both acrylic and latex exterior masonry paint can be used for this step. Ensure the paint you choose is durable enough to withstand moisture and temperature changes. After cleaning the paintbrush, you can use the same brush you used for the sealer or primer.
However, invest in a roller if you are dealing with significant or hard-to-reach areas. When you have applied a thin layer of paint, let it dry. This process can take up to eight hours, depending on the paint you used and how thickly you applied it. You may want to wait until it has dried overnight before moving on.
Step 6: Apply a second coat
To get the best coverage, you’ll need a second coat of paint. However, it would help to wait until the first coat has completely dried before applying the second coat. It is possible for another coat of paint to streak, peel, and cause an uneven finish if the first coat is still wet.
After applying the second coat of paint, please wait for it to dry before using the space again. The paint won’t get bumped or scuffed that way. It’s finished once the second coat is dry! Cinderblocks have been successfully painted.
Things to Consider while painting cinder block wall
The steps for painting cinder block are broadly applicable, but there are a few things to keep in mind:
- Check the weather forecast before painting an outdoor wall. If it’s hot, take into account your physical well-being as well as the need for drying time between coats of paint and after cleaning. It would be ideal if it did not rain for a few days.
- It is essential to wait for the wall and paint coats to dry before moving on ultimately.
- To ensure the long-term durability of your paint job, apply concrete sealer or primer first. It shouldn’t be substituted for regular primer because it flakes off quickly when applied to the concrete.