Bathroom cabinet with concrete countertop

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Project by Alexandre Lussier posted 02-13-2016 03:38 PM 1249 views 2 times favorited 4 comments Add to Favorites Watch

Last fall I made my first attempt at cabinet with this bathroom unit for the basement. I build it from birch plywood again. I like birch plywood I think. I made the concrete top myself using melamine to make a mould. It was a simple process and I will certainly make other projects with concrete.

It is far from perfection but I did learn a lot making that project.

-- Alex, Bas Saint-Laurent

4 comments so far

View Matt Reynolds's profile

Matt Reynolds

52 posts in 1039 days

#1 posted 02-14-2016 12:32 AM

Looks great man I would like to do our kitchen countertops myself. I really like the looks and the cost aint too terrible either.

-- Matt Reynolds

View tedbalog's profile


6 posts in 1035 days

#2 posted 02-14-2016 01:24 AM

Looks very nice, how was your experience with creating the countertop? I was planning to do this for our downstairs bathroom.

View Alexandre Lussier's profile

Alexandre Lussier

93 posts in 1037 days

#3 posted 02-14-2016 02:34 AM

Thank you. The concrete was more intimidating than anything else. I made a melamine mould and a 2”x4” frame a round it. It’s important to waterproof the edge of the melamine with a good tape to avoid infiltration. Once the mould is build, make a silicon joint in all the corners to keep the concrete water in and to get a smooth edge and minimize sanding. The frame is important because once the concrete is in the mould, it’s hammer time. It’ s important to gently knock on the frame for about an hour to help air bubbles escape. Some people use an orbital sander but after a try I did switch to the hammer. After a day or two, you can unmould it and feel terrible about the result. The bottom of the mould is the top of the counter but at this point it is still disapointing. There is a lot of pinholes and milky spots but after a muriatic acid wash(be careful with that stuff) and few slury passes with a matching color sanded grout with polymer everything will be fine. I did use cheap construction grade concrete mix and this 20” x 60” countertop cost about 30$. Don’t Forget the wire mesh and to sleeve required openings before pouring. Good night.

-- Alex, Bas Saint-Laurent

View Kristian_S's profile


22 posts in 1103 days

#4 posted 02-19-2016 04:21 PM

I’ve tried both a hammer and orbital sander. The orbital sander worked much faster. What I typically do is run a concrete vibrator through the mix while it’s still in the bucket for 15sec. It gets quite a bit of the air out and reduces vibrating time in the mold.

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