We need to tile a 3' by 5' exterior landing and a 7' by 9' interior mudroom.
"Tiling is easy," they said. "Even beginners can do it."
Uh huh. Just grab some grout and slap those tiles in? No. Let me tell what you really need to do:
Secure your sub-floor. This means knowing where your joists are and nailing the 3/4" plywood down with decking nails (galvanized because they're exterior) every four to eight inches. We chose six. Hit each nail ten times because they're looong. Hit them carefully because they are "twisty" nails and you don't want to bend them because they were expensive. Strain your arm putting in seventy-plus nails.
Now what about the end of the plywood that has been out in the rain and looks bent and that isn't long enough? Take it out, replace it, then realize the masonry at the end causes to it stick up and be angled the wrong way (bad in the rain!) Realize now that nailing into masonry isn't possible with a regular hammer and nail. Now that it's half nailed in, you don't want to take it out and ruin it. Figure out how to chip away masonry. Figure out how to level masonry. Be sure the sides of your exterior entry have their gaps closed, so nail in boards from underneath and try your hand at filling with thinset cement.
Figure out how to nail through 3/4" plywood and into masonry. You can use a nail gun that uses blank .22 bullets. Yeah, you'll have that on-hand, won't you? Good luck trying to find a place to rent you this weapon. Try not to shoot a nail through your foot.
Congratulations, you are nowhere near to tiling yet. You still have to put on the other layers: unmodified thinset, cement board using special screws that also use a special bit, tape, thinset for the tape and screws, liquid waterproofing membrane (priming layer), waterproofing tape on the sides (fiberglass fabric of which there are many, many varieties), more waterproofing membrane (thicker, but not too thick). One more waterproofing layer. Let dry thoroughly in between. One more thing: be sure you didn't screw down that cement board into any joists because you're just asking for your tiles to crack.
STILL not ready! Install the exterior door. How? Youtube. Dunno. Probably shims and screws.
Now you're ready, but not for grout. You're ready for modified thinset. Unlike the unmodified, this stuff has latex additive and is more flexible. Yeah, you need the parts under the tile to be able to shift in weather. Do you need expansion gaps? What does that even mean? It means you'll need exterior-rated silicone caulk that matches the color of your grout. Leave expansion gaps around the perimeter. Don't worry, it's not really clear how you're supposed to do that. If your tiling area is very large (over 12'), make an expansion gap or two...somewhere. I stopped paying attention since our area wasn't that large.
Are we ready yet? Well, set those tiles using the modified thinset! Make sure you don't have weird cuts to do leaving weirdly cut tiles in places where you can see them and be irritated forever. Be sure you install the tiles in straight lines or else be irritated forever. Did you already consider what orientation you'll be setting your tile? Straight, diamond, off-centered? Yeah, you should have tested that long before this point. You should also have made double sure you have enough tiles by laying them out on the plywood before you did any of this. Too late now.
Speaking of tiles, I hope they're not ceramic if you're using them outside. You're just asking for your tiles to fail. Do you have the kind of tiles that need to be sealed first? Dunno. Too much to think about. Gotta tile this floor before it rains.
Be sure you know how to put that modified thinset on in a way that doesn't leave gaps. Use the notched trowel that you have chosen with the correct size notches. What size is that? 1/4" is the most mentioned. Trowel on the cement board and smear it around, but be sure you use the notches in the trowel to give a final swipe in one direction. Do not swirl! Why? Because you don't want to leave gaps, do you? "Butter" the back of your tile, too. It's what the pros do. Set in your tile. Wiggle it. Not too much! Be sure you've gotten 90% coverage on the back. How? Uh... I dunno. Cross your eyes and make a wish.
Can we grout yet? Well, did you get the right kind of grout? You can have premixed, cement, or epoxy. Premixed is fantastic...unless you look at the reviews of the many people who vehemently hate it. It doesn't need to be sealed, but you have three seconds to wipe it off the face of the tile before it sets forever. Cement is the most used, but you need to seal it (and reseal it periodically) with yet another product and you can't touch the product to the tile or you will discolor it forever. Cement is also water-permeable. Epoxy is waterproof and it doesn't need to be sealed ever. It is also fast-setting, you have to mix it in exact proportions, and it discolors when exposed to sunlight. Oh yeah, you must also choose the color of your grout in the poor light of your local hardware airplane hanger. What are the chances we can use the same grout for the tiles outside (green) and the tiles inside (creamish)? Slim to none.
Did I also mention you need a "float" (there will be at least five choices. Take the cheapest), a chamois (recommended over a sponge), a giant mixing tool that goes on your drill, buckets, spacers (you must know how wide you want your grout), and a rubber mallet? Oh, yeah, you need all those, too.
Hold on...did you think about what you do at the end, just above the
exterior steps? Drip edge and a bullnose? Or did you need
"stairnose"? Nobody's heard of stairnose at the local hardware stores.
Order it and get it in a week or three. How else will you keep the end
from crumbling off?
Yes, you can grout now. As long as you followed all the directions on everything and waited the correct length of time for whatever and whatever to set for however. Grout your heart out. But read the directions! It's good to have a partner to help you wipe or else you'll be very, very sad. Make small grout batches. Work in small sections. Get the grout in good. Get it in evenly. If you needed to mix the grout, did you mix it the same every time? If not, your grout color will come out patchy and weird. Did I mention you want a grout rated for "no efflorescence" if tiling outside? I didn't? What does it mean? Who knows. Make another wish.
Congratulations: you have tiled. Wasn't that easy?
