Should concrete be sealed before tiling?

taran96 · 10-09-2012, 11:03 PM

I have a concrete floor that is unsealed and would like to lay tile over it. It looks to have been poured after the walls were built or it was an old porch that was incorperated into the house. When it is wet outside, the concrete smells very musty and seems to draw moisture. I was wondering if I can seal it first and then use one of those membranes between it and the new floor?

Dan101 · 10-09-2012, 11:43 PM

Use Drylok masonry waterproofer

DannyT · 10-09-2012, 11:57 PM

if you seal it there is a chance that the thin set won't stick very well.

Canarywood1 · 10-10-2012, 11:48 AM

+1 What DannyT said.

poppameth · 10-11-2012, 06:49 AM

You have to use very specific products that are designed to have flooring installed over them. Bone Dry is probably one of the easier ones to use.

10-09-2012, 11:03 PM	#1
taran96 Newbie Join Date: Oct 2012 Posts: 1	Should concrete be sealed before tiling? I have a concrete floor that is unsealed and would like to lay tile over it. It looks to have been poured after the walls were built or it was an old porch that was incorperated into the house. When it is wet outside, the concrete smells very musty and seems to draw moisture. I was wondering if I can seal it first and then use one of those membranes between it and the new floor?

10-09-2012, 11:43 PM	#2
Dan101 Contractor Join Date: Jul 2007 Location: Chicago, Illinois Posts: 60	Should concrete be sealed before tiling? Use Drylok masonry waterproofer __________________ Dan101 Owner *J.& D. Remodeling* Chicago, IL

10-09-2012, 11:57 PM	#3
DannyT Member Join Date: Mar 2011 Location: Groveport, Ohio Posts: 1,597	Should concrete be sealed before tiling? if you seal it there is a chance that the thin set won't stick very well.

10-10-2012, 11:48 AM	#4
Canarywood1 Member Join Date: May 2012 Location: Sarasota,Florida Posts: 1,028	Should concrete be sealed before tiling? +1 What DannyT said.

10-11-2012, 06:49 AM	#5
poppameth Doer of Many Things Join Date: Oct 2008 Location: Staunton, VA Posts: 1,119	Should concrete be sealed before tiling? You have to use very specific products that are designed to have flooring installed over them. Bone Dry is probably one of the easier ones to use. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Should concrete be sealed before tiling?