DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Walls and Ceilings > Will hammering from basement waterproofing crack our plaster?

Help Support House Repair Talk by donating using the link above.
Thread Tools Search this Thread
Old 03-03-2010, 09:15 PM  
Junior Member
Join Date: Mar 2010
Posts: 1
Default Will hammering from basement waterproofing crack our plaster?

We need to have waterproofing done in our basement, and we were told they need to break up the concrete to put in a sump and drain tile. Our house was built in the 50s and had plaster walls on the ground floor. Is there danger that the jack hammering they have to do in the basement will crack out plaster?

csabr is offline  
Reply With Quote
Old 03-03-2010, 10:41 PM  
Cork Flooring Pros
Cork-Guy's Avatar
Join Date: Oct 2009
Posts: 243

There is a slight chance it might; you could try doing it with a sledge hammer to minimize the vibrations, however that would be one hell of a task! Do you have support beams in your basement going into the concert itself?

Cork Flooring - Ventless Fireplace
Cork-Guy is offline  
Reply With Quote
Old 03-03-2010, 10:45 PM  
mudmixer's Avatar
Join Date: Sep 2006
Location: St. Paul/Minneapolis, MN
Posts: 665
Liked 75 Times on 58 Posts
Likes Given: 67


If they cut or score the edges of the removal area, that will minimize or eliminate the need for for a jackhammer. When I did my interior drain tile myself, I hired a man with a good saw to cut the line and make the diagonal cuts at the corners. Once you have the edges scored deeply and can get a hole started, a jackhammer is not needed if you want to use a sledge and break it into manageable sized chunks.

Much depends on what you specified when asking for a quotation and what was proposed.

mudmixer is offline  
Reply With Quote
Old 03-04-2010, 01:35 PM  
Junior Member
Join Date: Mar 2010
Posts: 2
Default Very Unlikely

It is very unlikely that jackhammering the basement slab will cause any damage in the walls on the main floor.

Here's why. It is very likely that your basement walls are resting on a footing. The floor slab is poured once the walls are in place. The floor slab in this case is not connected to the walls. It may be lying right up against the walls but the vibrations from a jackhammer are quickly absorbed by the soil below the floor and would never, in this case, reach the top of the foundation walls to an extent that might cause damage.

If your basement is monolithic there is a higher risk. A monolithic foundation is one that is constructed to incorporate the floor slab into the stability and structure of your home. In this case, a large void is dug around the perimeter where the foundation walls are going to be erected.

The floor slab is poured and a where the voids are the concrete is much thicker than the inner parts of the basement floor. This thick area of cement is what holds up the foundation walls.

Jackhammering the perimeter of a basement with a monolithic foundation is NOT recommended and can undermine the structural integrity of your home and definitely cause damage on all floors of the home.

I am going to use your question and my answer as a post on my blog. Thanks for the idea! Massachusetts Foundation Repair Co | Wet Basement Waterproofing
MaFoundationFix is offline  
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Is waterproofing brick really necessary? Superpack General Home Improvement Discussion 1 01-08-2010 06:48 AM
waterproofing ceiling itwzntme Walls and Ceilings 2 09-25-2009 12:44 PM
basement baseboard waterproofing system...not working! Christian General Home Improvement Discussion 10 07-02-2009 07:08 AM
Hammering noise, and NO water coming out chelsita98 Plumbing Forum 2 02-18-2009 05:52 PM
Questions re: Waterproofing basement floor kamaboko Bricks, Masonry and Concrete 1 09-13-2007 09:29 AM

Newest Threads