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Tile over tile implies precisely what it says, but in this case youre going to sandwich a layer of radiant heating mats in between the old and the new tile. Tile over tile is an simple way to avoid the mess associated with tearing up the old bathroom floor, but needs thorough arranging. Deflection: Ahead of you install a radiant heat mat over the old bathroom tile and install new tile more than the mat, you really should verify the floor for deflection. This is the maximum amount the floor can move under the anticipated load (you). Ceramic tile is challenging and will break or dislodge if the surface bends under the load. Heres a basic test: Stand in the middle of the bathroom floor and jump up and down. If the floor moves it has a deflection issue and is not a good candidate for tile over tile installation till you reinforce the sub-floor. Steer clear of That Sinking Feeling: Considering that youre tiling over tile, you should plan in advance to keep away from making the vanity, toilet and tub appear like theyre sinking into the new floor. web address Fortunately, many of the new radiant heating mats are no thicker than the depth of the mortar you would ordinarily apply for most tile installations. Combine this with a tile thickness of inch and the maximum elevation above the old floor would be only inch. 1 way to preserve the bathroom fixtures from hunting swallowed up by the new floor is to remove and reinstall the baseboard. Much better yet, why not buy new baseboard tile to complement the new floor? The raised height of the new floor will also need you to adjust the length of the door(s) and possibly set up a new threshold. Preparation: Eliminate or re-attach broken tile pieces. If you take away them, wait till the floor has been sanded and thoroughly vacuumed before you fill the spaces with mortar. If any of the tiles have checks wider than 1/8, you ought to take into account a crack isolation membrane. This membrane is a roll on item that you apply to the old tile. The membrane allows the new floor to move independently of the old. Subsequent, sand the old tile so the mortar has a good bonding surface. A belt sander would guarantee a consistent bonding surface. Please make positive you put on a face mask and safety glasses whilst sanding. The tiles may possibly have been fired with toxic lead glaze. After sanding, vacuum the tile and wipe down with an all goal cleaner. Pay special interest to the areas untouched by the sander. Installation: Roll out the mats prefabricated to your specifications by the manufacturer. Some radiant systems, like Quickmat, are self-adhesive and need no mortar to secure them to the old tile floor. If youre re-tiling the only bathroom, preserve a board and some scrap 2 x 4s handy to shield the mats when the bathroom is being utilised. All through the installation method, use a digital ohm meter to check the resistance of the heating mats. This will aid you monitor the mats for short circuits. Have your electrician connect the heating mats to the power supply and set up the thermostat. Based on the nearby electrical inspection procedures, you may well have to wait until the job is inspected prior to you start off laying tile. Trowel out the mortar over the mats. Some makers recommend latex- modified or epoxy-modified mortar and grout as an alternative of water-based multi-purpose adhesives. Mortar beds thicker than 3/8 inch really should perform fine for most systems they just take slightly longer to heat up. Since you wont be covering the entire floor with heating mats, make certain the mortar applied more than open areas, (beneath the toilet) is level with the mortar covered mats. Dont bang the trowel on the mat or heating wire to get rid of excess mortar from the trowel. This could sever the heating wire. At this point, you would lay the tile. If you have no expertise tiling, practice on your neighbors bathroom floor. Fire It Up! Your new radiant heated bathroom floor looks lovely and you cant wait to get warm feet. Go ahead, but only for 10 minutes. Dont put the program into full operation until the mortar is completely cured. This can take up to four weeks. See why thorough planning is so important?