Switch to a reciprocating.
Tile over old carpet glue.
This poses serious health concern.
The adhesive often called carpet mastic used under most glue down carpet is usually water soluble and tends to prevent thinset from properly adhering.
Well there are adhesive solvents that are designed for this.
How to lay tile over a concrete floor that has glue residue from carpet.
Use a long handled scraper like the kind made to remove ice to get as much of the old adhesive off the floor as you can.
Triseal is not recommended for use in conjunction with polyurethane based adhesives.
Use over old cutback multi purpose and pressure sensitive adhesive residues.
Use steam or boiling water to soften the stubborn glue that refuses to budge.
And i ve got to tell you though scott it s a big messy sticky job.
And i m trying to find something that will loosen up that glue so i can get it off and start all over again.
Asphalt based cutback adhesive remaining on a concrete floor after removing old vinyl tile and other flooring represents one of the most difficult and risky subfloors for the installation of new flooring.
Choose carpet tiles that interlock into place.
Apply a soy based.
Existing low pile carpet can serve as the carpet pad.
Scrape away as much glue as you can using a scraper sparkling knife 5 in 1 tool or razor.
Patching manufacturers only recommend going over non water soluble adhesives.
So i pulled up the old tile in my bedroom and it was installed over vinyl flooring.
Many installers simply see adhesive residue and immediately skim coat over the old adhesive residue.
Hi i ve got an old farmhouse.
Sweep up any debris caused by the scraping.
Care must be taken here as most patching manufacturers do not recommend skim coating over all types of adhesive residue.
Regardless of which product or system you choose to use you will have to prepare the existing adhesive residue.
Should the tile get wet the mastic may soften negatively affecting the bond of the tile to the substrate.
We are talking old school 1960 s thick vinyl floor 12 x 12 s and the ceramic floor stuck just fine but now there is black glue on the concrete and it is real thin but and is sticking very well to the con.
Using a carpet pad or plywood base over the existing carpet can create an even base for new carpet tiles.