How To Form Small Concrete Projects The Easy Waycomments (6) December 10th, 2010 in Blogs
Video Length: 1:51
Produced by: John Ross
When you’re making small scale architectural elements out of concrete, you could use a stick to make sure that the concrete is compacted into all of the voids, but there’s a better way.
We’re making some pilasters for a concrete fireplace surround, but the same technique should apply to any small masonry project.
Here’s how to do it:
- Build a mold out of plywood assembled with drywall screws
- For more detail, use pieces of trim or other found objects in the mold. We used cove moldings at the bottom to give a rounded reveal along the edge of our pilaster
- Cover the inside of the mold with blue masking tape. This acts as a form release agent so your cured concrete should fall right out
- When half the concrete is in your mold, run the shoe of your sawzall (without a blade installed) along the sides of the form. The vibrations will settle the concrete and get rid of the voids
- Top the mold off with concrete, and wait for your project to cure before removing it
I heard about using a sawzall for this purpose on a jobsite one time; no one has ever sent it in. It’s just a tip I’ve been using over the years and it really works well. Thanks whoever.
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