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You will need to lay a cement backer over the linoleum after making sure the floor is level. Since you can't get the linoleum off then proceed with screwing down your backer board to the cement using a hammer drill. If there was to remove the linoleum I would, especially since it is on a cement floor and you should have some kind of vapor barrier.s
If they are the newer cement tiles, I would try a small cement drill, about the size of a 16 penny nail. Try to gently drill a hole in the tile where you want to nail it to the roof. Or use screws that don't rust. Don't nail or screw down to the tile, that will break it. You just want the nail to hold the tile in position. If they are the older mission tiles, made of clay, the same might work. But they are very brittle and may need a wood support shaped the same as the tile to put under before drilling.................JJJs
A friend of mine installed a new layer of tiles atop the existing floor tiles about three years ago. There have been no problems,he did this with the entire condo.Believe it or not,he sold the place recently and the person who bought the place,did not like the color of the tiles so he installed a new layer,now being a total of 3 layers of floor tiles.s
The TYPE, size and style of tile determines the size of gap and the type of grout used. Sanded or unsanded. A general rule of thumb, and this is a general rule, 4x4 and most white (white not off white/tan) bodied tile takes almost no gap and tiles are self spacing and use an unsanded grout. Any thing larger and has a red/ tan /grayish or darker body takes a sanded grout and a space as small as 1/8 and no smaller and up to 1/2 grout size. Sealing all grout properly ( easy job) will help a lot in the staining of the grout. There is no choice , the proper gap and type of grout must be used or the grout can fail. Any questions you cane mail me through my avatar and check my qualifications there. GLs