Last week, both my Asko w600 washer and t700 dryer failed badly. The washer had been leaking for a while, then the belt snapped on the dryer. When I took them out, the damage was worse than I had hoped.
The worst of the damage was caused by the leaking washer because when I built the drain pan, I imagined catching a catastrophic leak, not a little dribble. It turns out the "bellows" on the washer got a tear and had been leaking for some time. This saturated the grout, then went under and saturated the underlayment of my hardwood floors The underlayment got so wet, it penetrated the "moisture barrier" and soaked the wood floors, causing discoloration and mold.
I ordered the parts and then evaluated the damage in the laundry room.
Here I have both appliances taken apart. The dryer is on the left, and the washer is on the right. To pin point the leak on the washer, I had to power it up. Since it's 220v, I used a regular 110v receptacle with the two hots of 220v hooked up to the regular hot and neutral and since the washer didn't need a neutral, the ground stayed the same. I then used a regular extension cord with a few "go between" wires taped to the 220 head coming off the washer. A garden hose supplied the water, then the waste into a 5 gallon bucket.
This is the damage. You can see the discoloration of the wood. I might have been able to simply let the wood dry out, but the finish was cracking in several places, so it had to come out. The tile had given me problems for a while. I hadn't provided good backing for the tile, and pieces would pop off in the corner. The water caused all the pieces on the wall to pop off as well. 
I removed the hardwood floor, which is easier than I thought it
would be. Just set the circular saw to just short of the depth of the wood so you don't end up
cutting the underlayment and then cut outside of where the tongue
and groove are located. It is now easy to chip the remainder out with a chisel or screw driver and
leave a clean tongue or groove for the new flooring. 
I poured a new concrete base around the drain and sloped it to
the drain. Make sure when you are pouring a small pan like this to use a sand/cement mix, too big of aggregate will make this more difficult.
With the base cured, it's time to put down the real barrier that's going to keep everything dry. This is a PVC sheet that you can get cut to your needs from Lowes. You fit it around the
pan area going up the sides and a around the lip, I then tucked the
corners and stapled them. When you cut around the hole for the drain, if you're doing a shower, you want to cement it to the drain, and then use the top screw in part of the drain to sandwich the pvc. I didn't have a drain like that, so I ran a 2 inch bead of silicon caulk under the sheet and around the drain to get it nice and water tight. Let the caulk cure.
For this project I wanted some extra reinforcement for both the tile and concrete. I took some mesh that I also bought from Lowes, I think it was 1/2"x1/2"
and placed it over the PVC and stapled it in place as well. The mesh will provide strong backing for the morter to grab onto on the outside of the lip - no more tiles popping off. I then
placed cement backer board over everything on the wall and secured with
galvanized screws.
the top layer of concrete, again sloped towards the drain. Also, again I'd recommend mixing your own concrete with sand and cement. large aggregate makes this a pain unless you're making the pan super thick. For this layer, I ran out of cement, so I used a bag a premix I had in my shed. It would have turned out better if I had just gone on bought more cement.
I knew it would be a lot easier to put the wood
flooring back in before the tile. So this is the new maple, it is a
different color now but will yellow with time and match the existing.
One thing I am still considering is running silicon caulk in the v-grooves around the laundry to help make it more water tight. I did this around the kitchen sink even though the glue I use is water tight- just for an extra layer of protection. You can get it so it's not even noticeable and if water is a concern for you, I'd recommend it. You simply apply a thin bead, use your finger to push it into the groove, then wipe off with a damp sponge until all that's left is what is in the groove.
I was able to use the same glass tile I used before since I had quite a bit left over in the box. This time was so much quicker. I didn't want
to borrow a tile saw so I thought I'd try my grinder out. Couldn't have
been easier. All I had to do to cut the tile was score the back of the
tile with the grinder and I'd get a clean break.
Usually for tile, you'd
cut it all first and have it layed out before you mix your mortar, but
for this project, the grinding method was so quick, it didn't
matter. All said from start to finish, it took three hours to get all the tile cut and mortared.
Then you grout... easy enough, Slop it on with a rubber trowel, sponge it off.
While the grout was setting, I decided to redo the paneling next to the
door. One had fallen off, got soaked and was ruined. They also
weren't deep enough to be covered by our stacked washer/ dryer. I had orginally planned to buy a
whirlpool duet which is significantly larger and would have completely
covered the space. My mistake.
I had one 2x4 panel left and cut it into
thirds, stained it up and then covered with varnish. The previous method
I used for applying the panels was horrid. Previously I had asked some finish
guys I know about the panels and they had told me they always use
contact cement for bonding. They must have some freaking amazing contact cement, because
my experience was not so great (corners came off, also as noted that one
complete panel fell off).
This time around, I decided to use gorilla glue after
having some great success with it on the car interior panels of our Benz (the plastic clips had broken away when I removed the door panel). Gorilla
glue is great, super strong hold, only two hours to set... Earns my
recommendation.You also may notice, that I use sanding polls to hold the
panels in place.
Panel Two
Panel Three
Panel Four
After the grout was set I sealed the tile and then ran silicon caulk around all corners and edges.
The belt finally arrived by this time and I was able to replace both the bellows in the washer and the dryer belt.
This is the old bellows and you can clearly see the leak origin.
Here is the new bellows installed. A note to anybody doing this
themselves, be careful with the clamps or buy some when you get the
replacement bellows, they are narrow clamps that you can't just run to
your local hardware store for. I was careful on two and was able to
reuse and was lucky the third was in a location I could use a larger
clamp (it's on the end next to the drain pump).
Here's the replacement dryer belt installed.
Another problem that I had once was the drain trap dried up and we
were getting some funky odors in the house... not cool. This time I took
some irrigation hose, jammed it up the drain hose of the washer and
zip tied it both to the hose and the floor drain as seen below, This
way the trap gets a little water with each wash.
Here is the washer and dryer reinstalled. I had a little bit of
trouble getting them level due to the location of the drain, I also
realized the washer was leaking out the door gasket. To remedy this I
removed the door of the washer and took it apart, rotated the gasket 180 degrees
and reassembled.
Since I went through all this work, I thought I should take care of the
cable problem in this corner as well. I have all the telephone,
internet, distributed audio and video, surveillance, and control wires
coming in here, and it was a mess with just a small table to hold
everything. I bought a small used cabinet for $10 that was close to what I wanted,
took it apart, cut it up, sanded and painted it, then reassembled. Now
everything is contained nice and clean.
The drawer slides out for a desk for the kids to use.
Some people have wondered why go through all the effort for the paneling
and such when it's just a laundry room, but here's the view from our
back yard. In my opinion, it's worth it. 
Below is a reminder of what this space originally looked like.
My son, wasted no time, having fun at the new computer area.
