Step 6: Routered Edge & Taping
Follow the diagram from step 2 to build the edge forms for your counter. Use a router with a half inch round over bit on the edge of your 3/4 inch melamine that makes up your counter base. An unroutered 90 degree angle would create a stress point and increase the likelihood of cracking. Cover exposed wood with tape.
It is important to cover any areas where the wood underlying the melamine is exposed. Uncoated or uncovered wood would absorb the water out of the concrete and cause it to become brittle and more susceptible to cracks.
We used a combination of painters tape and duct tape depending on what we had available. Focus on routered edges, joints, screw holes and where two pieces of melamine meet.