Can a jackhammer damage foundations?

Annemos

If you have a water meter, check your meter regularly. 
I just had a black alkathene water pipe rupture.
(It was either ground movement due to Subsidence or due to the actual Subsidence repairs, which also involved taking out a concrete path and other work near the pipe.) 

Phil4432

Doozergirl said:

As long as the water there now is 150mm below DPC, it shouldn't penetrate anything. 

I know a couple of households who thought the same.  One got rising damp, the other got subsidence.

BananaRepublic

I had to have the soil pipe in my bathroom moved, and they had to go down through 1m of concrete. They used a jackhammer, and the walls etc show no damage. 

Doozergirl

Phil4432 said:

Doozergirl said:

As long as the water there now is 150mm below DPC, it shouldn't penetrate anything. 

I know a couple of households who thought the same.  One got rising damp, the other got subsidence.

Did you deliberately cut the next sentence where I said that drainage was important?  I was talking about a temporary situation of the works, but no one should ever have rising damp if the ground level is 150mm below the DPC.  It's the minimum regulation for building dry houses.      As for subsidence, that's not going to happen because the path is temporarily missing.  

Deal with the issue in hand, yours, as I'm not sure what you're on about with your two examples.  You've had decent advice on what the paths needs to look like in order to be technically correct.  Being technically correct ends in a dry house, not the opposite.   

  

Doozergirl

Phil4432 said:

Doozergirl said:

Phil4432 said:

greyteam1959 sa

Did he have a test & trace done before he started ??
Hope your services don't run under his path.

No, he didn't.  And my builder informed me tonight that he shouldn't have been using a jackhammer there, as its over clay drainage pipes.  In order to remove the path, he would have been placing the chisel right against my wall also.

They are, at least, doing you a favour by removing anything against the wall.  As Freebear said, make sure that what goes back is not the same level of damp risk! 

What was against the wall was concrete, which was at a gradient and moving water away from the house towards the drains.  Now all rainwater is sitting right next to my house, about 1" deep.  If any of that water penetrates my property, it will freeze.  We have more rain forecasted for next week, I doubt he'll be able to do whatever it is they are planning to do. 

In 2019 it wasn't any good on your neighbour's side. 
https://forums.moneysavingexpert.com/discussion/6066863/water-collecting-next-to-foundation#latest

And in 2020 you appear to have had a similar sort of issue on your own land.  

https://forums.moneysavingexpert.com/discussion/6066863/water-collecting-next-to-foundation#latest

Thank goodness the neighbour is sorting it.  Perhaps you can have a sensible conversation with them about the three sets of similar answers you've received over the last 15 months.  

Phil4432

Doozergirl said:

Phil4432 said:

Doozergirl said:

Phil4432 said:

greyteam1959 sa

Did he have a test & trace done before he started ??
Hope your services don't run under his path.

No, he didn't.  And my builder informed me tonight that he shouldn't have been using a jackhammer there, as its over clay drainage pipes.  In order to remove the path, he would have been placing the chisel right against my wall also.

They are, at least, doing you a favour by removing anything against the wall.  As Freebear said, make sure that what goes back is not the same level of damp risk! 

What was against the wall was concrete, which was at a gradient and moving water away from the house towards the drains.  Now all rainwater is sitting right next to my house, about 1" deep.  If any of that water penetrates my property, it will freeze.  We have more rain forecasted for next week, I doubt he'll be able to do whatever it is they are planning to do. 

In 2019 it wasn't any good on your neighbour's side. 
https://forums.moneysavingexpert.com/discussion/6066863/water-collecting-next-to-foundation#latest

And in 2020 you appear to have had a similar sort of issue on your own land.  

https://forums.moneysavingexpert.com/discussion/6066863/water-collecting-next-to-foundation#latest

Thank goodness the neighbour is sorting it.  Perhaps you can have a sensible conversation with them about the three sets of similar answers you've received over the last 15 months.  

Deary me Doozergirl.  I merely pointed out that people who have a build up of rainwater next to their foundation are more susceptible to rising damp, and subsidence and that this has occurred to two houses in the area.  In both cases, incorrect drainage and stagnant water were proved to be the culprits.  No need for you to throw your toys out of the pram. 

I've been informed this by two professional surveyors, a builder and there are many articles online about the danger of stagnant water against the foundation of a property.