After removing porcelin tiles from concrete slab, the mastic or adhesive is still stuck to slab. Do I need to remove it by chiseling it all off , or skim coat it, or just lay the laminate with the padding attached right over the mastic?
2007-10-12 11:36:29 · 9 answers · asked by Matt 2 in Home & Garden ➔ Decorating & Remodeling
It depends on several things. Is the floor you intend to install: glue down, nail down or floating? If you are going to glue or nail, then yes-the concrete needs to be clean/smooth, you may even have to patch/float low spots. If the floor is floating, then scrape most of the mastic off (special tool-not too expensive), any small imperfections will be hidden by your vapor barrier and padding. If you are skipping the vapor barrier/padding-you are back to needing a smooth and clean surface. The old mastic will cause ripples and cracks in your wood, it may even cause the planks to separate at the seams. Buy or rent the floor spud-minimal effort and about 15 minutes will "clean" a 10 X 15 room. Couple of hints...mist the floor with water (not enough for puddles) and that will keep the dust down; use a shop vac to clean up. A floor spud is a heavy long handle chisel-you scrape the floor while standing up, much better than on your knees.
2007-10-12 11:46:31 · answer #1 · answered by Tuff 2 · 0⤊ 0⤋
Hi I have done this in a conservatory, check for obvious faults in the finish of the concrete then lay a cushion of felt available from B&Q they also sell a product which has a sticky back with a thin layer of inpact sponge type material which is layed sticky side up this come on a roll. This provides a flat surface and in effect sticks the flooring together stopping any movement with out the use of screws or nails, also provides insulation. Regards John
2016-03-12 20:53:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Probably no more than about 1/16 inch deviation (bumps and such), assuming you're installing a layer of foam sheeting underneath it. The foam sheeting (about 1/16 inch thick) provides a moisture barrier if the laminate is installed on a wooden subfloor. It also provides a slight amount of cushioning, which reduces fatigue of standing on the floor for long periods of time.
We had a laminate floor (looked like 12-inch terra cotta tiles) installed, and chose the laminate over vinyl or tile because we didn't have to remove any of the existing layers of vinyl before installing the laminate (per the contractor who did the work). It came out beautifully, with no problems whatsoever.
2007-10-12 11:47:15 · answer #3 · answered by Paul in San Diego 7 · 1⤊ 0⤋
It does need to be flat but it does not have to be perfect. Laminate wood is a floating floor so the base does not have to be perfectly smooth.
2007-10-12 11:58:52 · answer #4 · answered by d020958 1 · 0⤊ 0⤋
It needs to be level, because if it isn't, any dents or indentations in the concrete will cause the flooring to crack and start splitting. If it's got little bumps sticking out, you need to sand them until you can't feel them anymore. You can leave the left on mastic if it's smoothed down even. Byee
2007-10-12 11:42:19 · answer #5 · answered by Sandyspacecase 7 · 1⤊ 0⤋
ok you can get some leavaling cement and put that down first it'sis real easy it's like soup how big of a area are we talking don't just lay it over mastic you can also use luann ply wood put a thin layer of glue down and and then the luan best side up that will also work ok john o
2007-10-12 11:48:30 · answer #6 · answered by Anonymous · 1⤊ 0⤋
Really flat. There is filler to spread in low spots, so you can cure a certain amount of irregularity.
2007-10-12 11:40:46 · answer #7 · answered by Duane R-H 2 · 1⤊ 0⤋
it doesnt need to be flat, but it needs to be clean.
so take of the mastic, real pain i know ....
but your wood , will sit much better, over the padding
2007-10-12 11:39:48 · answer #8 · answered by Anonymous · 0⤊ 0⤋
way flat
2007-10-12 11:41:08 · answer #9 · answered by Logan 2 · 1⤊ 0⤋