Originally Posted by jfair
standard rounded edge countertop, pre-mitred, with a built in backsplash. We have on L-shaped section with open ends and one other straight section with open ends, so we have room or error on the measurements. One sink hole to cut.
My specific questions are....
What type of saw/blade should we use to make the cuts?
Carbide tip circular saw blade, as high a tooth count as you can find.
Make your cut as clean and straight as possible, don't try to correct your cuts midway into the cut. Back up and line it up again. Turning the saw in the cut will burn the sides of the cut and may chip the laminate.
Should we cut from the laminate side or from the bottom for the cleanest cuts?
Flip it over and cut from the back. The saw will be cutting through the laminate first that way. This minimizes chipping from the lift created by the saw during the cut. I apply masking tape over all of my cuts on the laminate side to further re-enforce the laminate and reduce chipping.
What do we use at the mitred joint to seal it and ensure a good fit? Any other helpful tips?
There are sealers made especially for these joints. I use a high quality silicone caulking to seal the miters. Make sure you wipe off all of the excess that squeezes out onto the surface of the laminate before it sets. I know a guy who lets it set, then he scrapes it off with a razor scraper. I'm not brave enough to put a razor to a new laminate top!
Other useful tips?
Cut the sink opening with a jig-saw. If you have a 2" or larger holesaw, you can use that in the corners and flip it over and cut the straight lines with a circular saw.
Check the fit of the sink cut out template. Then check it again top and bottom. Make sure for certain that the rim will fit against the backsplash. Then check it again.
I'm an obsessed perfectionist. Check it again one more time, then cut.One more
, scribe the backsplash to fit the wall. Then you can get the fit against the wall close enough that you will not need to caulk any 1/2" gaps between the wall and the top of the backsplash.