previous
  • Gallery: Custom Flooring
    Gallery: Custom Flooring
  • Video: Build a curved step
    Video: Build a curved step
  • 7 Trim Carpentry Secrets
    7 Trim Carpentry Secrets
  • 7 Small Bathroom Layouts
    7 Small Bathroom Layouts
  • Clever daily tip in your inbox
    Clever daily tip in your inbox
  • Remodeling in Action
    Remodeling in Action
  • Read FHB on Your iPad
    Read FHB on Your iPad
  • Solid Deck-Framing Advice
    Solid Deck-Framing Advice
  • Tips & Techniques for Painting
    Tips & Techniques for Painting
  • 9 Concrete Countertops Ideas
    9 Concrete Countertops Ideas
  • 12 Remodeling Secrets
    12 Remodeling Secrets
  • Video Series: Install a Rock-Solid Tile Floor
    Video Series: Install a Rock-Solid Tile Floor
  • Master Carpenter Videos
    Master Carpenter Videos
  • Basement Remodeling Tips
    Basement Remodeling Tips
  • All about Roofing
    All about Roofing
  • Energy-Smart Details
    Energy-Smart Details
  • Video: Install a Fence
    Video: Install a Fence
  • Magazine Departments
    Magazine Departments
  • Deck Design & Construction
    Deck Design & Construction
  • 7 Smart Kitchen Solutions
    7 Smart Kitchen Solutions
next
Pin It

Concrete Countertops, Up Close

A primer on building three-part forms for custom installations

Building a concrete countertop with an integral sink starts with constructing a three-part form. The base, sink knockouts, and cap come together to contain and shape the concrete mix. But the forms don’t need to be made from expensive, hard-to-find materials. The three-part forms we build for our countertops and integral sinks are constructed from basic materials (melamine, 2x4s, MDF, PVC pipe, and Masonite) that can be found at any lumber yard or home center.

You need to have the exact measurements of the cabinet and faucets on hand before building the forms because the base and sink knockouts are built based on these dimensions. It’s a good idea to create a template of the countertop’s actual size, especially if the top will fit into a corner or between two walls. Layout the faucet and sink locations onto the template, then transfer them to a piece of 3/4-in. melamine to ensure a perfect fit.

It’s prudent to build the form on a flat, level surface in an area that can get wet; pouring concrete is a very messy process. Make sure the supporting surface is strong enough to handle the vibration caused during the pour and weight of the poured top while it cures.

To learn more about Matt's and Jeremy's process, read A Concrete Countertop and Sink in a Single Pour from Fine Homebuilding Issue #190 (Oct/Nov 2007), pp. 86-91.

Photo by: Chris Ermides
From Fine Homebuilding190