Countertop Refinishing With Concrete Overlay
With Direct Colors Concrete Overlay, countertops resurfacing for your home or office is easier than you think. With the ability to match pre-existing home decor, concrete allows you to add stylish design value without breaking the bank. Read on for more information about concrete countertops and concrete overlay.
What is Concrete Overlay?
Concrete Overlay for countertops is an ultra-strong, easy-to-apply concrete layer used to “lay over” existing laminate, formica, wood, or tile countertops. Overlay ensures a durable concrete look and feel at a fraction of the cost required for freshly poured concrete slabs. Concrete Overlay may be customized with Concrete Dye, Stain and Pigment for rich color and texture at a fraction of the cost as newly poured concrete. Whether you are refinishing concrete for a new look, repairing a crack, or overlaying on top of existing countertops, this DIY-friendly option will make your counters look and feel professionally done!
How Much Do Concrete Overlay Countertops Cost?
The estimated product cost for refinishing your existing countertops with integrally colored concrete overlay is $1.15 per square foot. Total project cost depends on preexisting conditions and design aggregate and finishes.
YOUR NEW COUNTERTOPS ARE JUST AN OVERLAY AWAY
Time needed: 1 day
HOW TO REFINISH A LAMINATE COUNTERTOP
Ensure your existing laminate countertop is reinforced and exhibits no flex.
Scuff the laminate surface with a 120-grit non-loading sandpaper.
Clean the laminate with a damp cloth to remove any dust or debris from scuffing and allow to dry.
Add concrete overlay to the vertical surface edges
Overlay the surface and allow to dry for 3-6 hours or until the overlay achieves a uniformly light gray color.
Time needed: 2 days
HOW TO REFINISH A TILE COUNTERTOP
Ensure your existing tiled countertop is leveled
Scuff the tile surface with a 120-grit non-loading sandpaper.
Wipe the tiled surface with a damp cloth to remove any dust or debris from scuffing and dry.
Fill all seams with a two-part epoxy and allow for a 16 hour cure time. Once cured, sand the areas down flush using 180-grit non-loading sandpaper.
Clean all dust and debris from the tile.
Add overlay to the vertical surface edges before applying on the tiled countertop.
Apply concrete overlay and allow to dry for 3-6 hours or until the overlay turns into a light gray color.
Apply a second skim coat and smooth with a squeegee trowel to prevent tile “ghosting” unless that is the desired finish.
Time needed: 2 days
HOW TO APPLY CONCRETE OVERLAY TO PLYWOOD COUNTERTOPS
- Select ¾ inch plywood with a sturdy base that exhibits no flex.
Attach Hardieacker board, or similar concrete board to the plywood using non-corrosive screws.
- Fill all seams and screw holes with a two-part epoxy and allow 16 hours to dry.
- Once epoxy has cured, sand the areas down flush using 180-grit non-loading sandpaper.
- Thoroughly clean all dust and debris from the surface in preparation for the sealing.
- Seal wood first using a urethane or solvent-based sealer and allow to dry. Do not apply overlay directly to unsealed plywood.
- Wipe down the surface in preparation for the overlay.
- Overlay the surface and allow to dry for 3-6 hours or until the overlay achieves a uniformly light gray color.
Apply a second skim coat and smooth with a magic trowel to prevent “ghosting” unless that is the desired finish.
Integrating Crushed Granite or Recycled Glass Aggregates into your concrete overlay countertop makes adds only a simple step, but yields a stunning result.
DESIGN TIP: Add colored Concrete Pigment to the “slurry” mixture for an additional flourish of color.
Time needed: 2 days
HOW TO MAKE A TERRAZO COUNTERTOP WITH CONCRETE OVERLAY
- Apply a ¼ inch overlay coat and press the natural stone and/or recycled glass aggregates into place, leaving the desired space between.
- Allow the concrete overlay to dry for a minimum of 14 hours.
- Then mix water and overlay to the consistency of a thin pancake batter to form what is known as “slurry.”
- Apply the “slurry” to the surface of the freshly laid aggregate to fill any voids or pinholes and let dry.
- After 24 hours, polish the countertop to reveal the natural stone or recycled glass aggregates.
- If you use small natural stone or glass aggregates, less than 10mm in size, they may be mixed directly into the overlay, allowed to dry, and then polished to be revealed.
How Do I Prepare Concrete Overlay?
We recommend using a 5 Gallon general purpose construction bucket for mixing concrete. When working in batches, take care to use the same amount of water for each round of mixing to promote consistency. Start by pouring one gallon of water into your bucket. Slowly begin pouring the contents of a Direct Colors 50 lb. Box of Concrete Overlay into the bucket while mixing continuously with a drill mixer. For best results, use a “birdcage,” high-shear paddle when bucket-mixing. This ensures the water will hydrate the dry polymer cement mixture and properly disperse all essential elements.
Use less water for a thicker consistency, or thin the overlay during application by adding water “as needed,” up to a maximum of one additional gallon. If using colored concrete pigment, it is essential that the water amount be kept uniform for every box of overlay to avoid color discrepancies.
The “pot life” for overlay is approximately 45 minutes. Overlay will not perform to potential beyond this window, but may be extended 15 minutes by using ice cold water during the mixing process. Ambient temperature will also affect pot life, with cooler temperatures marginally extending it and hotter conditions shortening.
How Thick Does a Concrete Overlay Have to Be?
The coverage rates for Direct Colors Concrete Overlay varies depending upon the thickness of the layer you apply.
For ¼ inch thickness you a 50 lb. bag will cover 20–25 square feet. For a skim coat, at ⅛ inch or less, a 50 lb. box should cover 50 to 130 square feet, depending on the thickness.