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How to Prep Before Installing Floor Tiles (page 1 of 2)

Learn how best to lay out and prepare for a tile floor installation.

Excerpted from Do It Yourself Home Improvement

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man lays tile floor using spacers for uniformity

The application methods for soft and hard floor tiles differ, but planning their layout is the same. The only difference is that hard tiles have grout joints, and soft tiles butt right up against each other.

Tools and Materials

Soft tiles are laid with the items in your basic toolkit and the extras include: sponge, rolling pin, wood offcut and threshold strip, and optional tools include paper, scissors, profile gauge, adhesive, adhesive spreader, paintbrush and sealant. Hard tiles call for largely the same items as are used for wall tiles, with a few key differences, as follows.

- Tiles are very robust, so a cutter must be of a high quality. Check that a score-and-snap cutter, if you use one, is large enough for floor tiles.
- Adhesive and grout must be harder-wearing than on wall tiles, and some tiles need special additives in adhesive for sound adhesion. If you are laying tiles on a wooden subfloor, buy adhesive and grout with flexibility (check the packaging); additives may again be required.
- Cross-shaped spacers lie flat on the floor and are removed before covering with grout. If the tile depth is insufficient for this, use vertical pieces of thin cardboard. Remove after the adhesive dries.

Planning the Layout

Do not just start laying tiles against one wall: the wall may not be straight, and adjustments to allow for this will become exaggerated and unsightly as you progress across the room.

First, Find a Starting Point
Use the center of the room as a base for the layout. "Dry lay" a few tiles, starting in the center and working toward the walls. The last full tile before you hit the wall is at your provisional starting point. Adjust the gap between this and the wall to avoid the need to cut awkward thin slivers.

Lay the First Tile
Consider how tiles will need to be cut to fit around any obstacles. If you can, tile with the fixtures removed, so that edges of tiles are hidden by the replaced fixtures.

Estimating Quantities for Floor Tiles

Basic Estimate
As a basic rule of thumb, estimate quantities by calculating the area of the floor minus the area covered by permanent fixtures.

Wastage and Trimming
Buy about 10 percent extra — maybe more if you are tiling a floor with many obstacles, because this results in a lot of cutting.

Manufacturers' guidelines for the necessary quantities tend not to be very generous, so it is worth buying a little more than is recommended.

Grout requirement depends on thickness of joints and size of tiles. There will be guidelines on packaging.

Remember to include spacers or sealant if necessary. Consider your subfloor requirements. These extras can add considerable expense.

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Excerpted from Do It Yourself Home Improvement

© Dorling Kindersley Limited 2009