After I’ve posted about having painted floors in the basement I’ve had quite a few questions on the process and requests for a how-to. So while I painted the floor in the main room downstairs a couple of weeks ago I took step by step photos to try and explain how I’ve done it. Please don’t just take my word for how it’s done though, check with your local paint store to make sure you get the proper paint for your floor. Anyway here’s how I do it (and it’s according to the instructions on the can of the paint I use which is Alcro Entré).
When we moved in I wanted to get my storage shelves up asap so I painted the space where they were going and left the rest untouched until now. As you can see the floor wasn’t looing too great. Quite a lot of wear and tear and lots of flaking areas. There was probably a rug there at the far end since that area is much less used.
I started out by cleaning the floor with a cleaner that degreases it and leaves it with a matte finish. You mix it with water, wipe the floor with it and then rinse. “Rinsing” basically means you need to get every bit of the cleaner and dirt off before you can paint. Since I couldn’t hose the floor off I got a clean mop head out and changed the water in my bucket a zillion times until the water was no longer cloudy.
That left me with a clean matte surface but also with areas of more peeling and flaking paint which is why it’s important to do this before scraping and sanding because otherwise you’ll end up doing it twice…
After the floor had dried I used a wire brush and sandpaper to smooth out those rough patches. If It didn’t have my shelves full of stuff in that same room I’d have used my mouse sander for this but I didn’t want it all to be covered with dust so I did it by hand. Not the most fun of jobs.
So now the floor was clean and smooth and I’d vacuumed it to remove all the dust so I could actually start painting. As with most paint jobs the prepping time is much longer than the actual painting time so by the time I was this far ahead I knew t was the home stretch.
When painting a concrete floor, if there are bare concrete patches you paint those first with a 90% paint + 10% water ratio. I guess the diluted paint adheres better to the concrete that way.
That left my floor looking like it had typhoid fever or some similar illness. As you can see there were a lot of bare patches at the bottom of the photo and this is the highest traffic area, from the doorway and through to the hobby room door which is where I was standing taking this photo.
After that was done I left the floor to dry. It says 3 hour between coats but the advice I got from my paint store was to leave more time in between the first and second coats for a stronger floor so I left about 12 hours or so between coats and painted three coats altogether including this first spotty one.
And here’s the final result again. If you look closely (on the actual floor) you can still see a world map of where the bare concrete patches once were. I guess if you want a perfectly smooth floor you need to fill those patches first before painting. Since this is the basement I wasn’t willing to take those extra measures and this looks good enough for me. In case you’re wondering about the name of the color I chose, it’s a grey straight off the neutral gray scale; NCS N-2000.