Basements, Attics and Crawl Spaces - Outdoor Cinder Block Patching
Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.View Full Version : Outdoor Cinder Block Patching
flyerfan
10-06-09, 05:09 PM
Hi,my outside cinder block foundation is coming apart in patches. I am calling it cinder block because the house was built in 1937, and you can see black flakes in it. ??
The stone is flaking off and under the surface is a aggregate mix that comes off in pebbles.
What type of concrete do I need to patch this with, and do i need a binder of some sort to adhere the new mix to it. Since the cinder block is contoured I will need to put quite a bit on to bring the stones to level and looking the same, thanks
The stone is flaking off and under the surface is a aggregate mix that comes off in pebbles.
What type of concrete do I need to patch this with, and do i need a binder of some sort to adhere the new mix to it. Since the cinder block is contoured I will need to put quite a bit on to bring the stones to level and looking the same, thanks
Mr. Fix It
10-12-09, 01:07 PM
Some pictures would help here.
My advice is to use a bonding agent that will allow the new cement to stick to the old cement.
You will need to remove all the old loose cement / stone etc before you apply the new.
I would call a respectable masonry contractor in your area to get estimates for the repairs and to ask him / her for advice as how to best repair the situation.
If the blocks are beyond saving, you might have to chisel them out and replace them with new blocks. Re grout and mortar all the seams.
I would make sure that once the job was done that I used some type of compound to seal the blocks from the surrounding dirt and I would use Hydroshield and even some wall board below the surface and put a 6 inch wide layer of 2b gravel the whole way around the foundation to try to keep the moisture away from the foundation and maybe even inspect , install or replace the french drain.
It sounds like you have a moisture problem, compounded by a lack of any type of sealant and the blocks have deteriorated and the structural integrity of the foundation has been compromised.
A house that does not have a good foundation will not stand!
My advice is to use a bonding agent that will allow the new cement to stick to the old cement.
You will need to remove all the old loose cement / stone etc before you apply the new.
I would call a respectable masonry contractor in your area to get estimates for the repairs and to ask him / her for advice as how to best repair the situation.
If the blocks are beyond saving, you might have to chisel them out and replace them with new blocks. Re grout and mortar all the seams.
I would make sure that once the job was done that I used some type of compound to seal the blocks from the surrounding dirt and I would use Hydroshield and even some wall board below the surface and put a 6 inch wide layer of 2b gravel the whole way around the foundation to try to keep the moisture away from the foundation and maybe even inspect , install or replace the french drain.
It sounds like you have a moisture problem, compounded by a lack of any type of sealant and the blocks have deteriorated and the structural integrity of the foundation has been compromised.
A house that does not have a good foundation will not stand!