Exactly what he said. I very rarely relaminate over existing. Peel it and start new. Never get as good of a bond as you do with fresh substrate.Texas Wax said:all the above....and for what it's worth
Done lots of it in commercial setting. This is actually more difficult than doing new. If you have not done a lot of new laminate, refacing can eat your lunch real fast. Not the option of choice, but if the customer will pay and you arr really up to it
-Bad substrate-swelling particle board, warpage..any of this and it's a no go make new.
-Loose laminate- pull it up and break it off - Bondo is your friend
-You can usually pull up the old laminate if it's real bad by flushing between the substrate and laminate with lacquer thinner if you need to remove entire faces. Need a squeeze bottle and a couple of gallons of thinner. Floor protection, it's a mess.
-Sand all surfaces with 120-150 grit till it has a good white haze (not form the dust)
-Seaming is a bh, pull the backsplash if at all possible and make new
-Use a real commercial grade contact cement-Wilsonart 500, 600 will work the best. The box store contact cements are "pro-sumer" grade and you will not be happy with the tack time and actual adhesion over time.
Typically it is best to fabricate new or buy new.