Damp proof course ??

[markus2025]

Hi guys so trying to fix a issue with rising damp on the internal skin and inter solid bricks walls my plan is to go along taking the bricks out bit by bit in stages and install a dpc like the images shows , just to get advice im i doing this correct and will method work ? i understand you can get chemical products but they can be hit and miss if they work

 

[Deluks]

Are these single thickness walls?

 

[markus2025]

The outside wall are brick cavity walls

The inside dividing walls are single brick down to the ground and they have damp issues aswell so was going to do the same with them

 

[Paulintheprocess]

I’ve seen people try this method but it’s usually pretty hard to get right. Cutting out bricks one by one and slipping in a physical DPC can work, but it needs to be done very slowly and supported properly or you risk movement in the wall.

The bigger issue is that rising damp is often caused by bridging or high ground levels rather than the DPC itself failing. So before you go too far, it might be worth checking outside levels, debris in the cavity and any plaster bridging.

If you’re set on doing it, take tiny sections at a time and keep everything supported, but personally I’d get someone to have a look first just to make sure you’re fixing the right problem.

 

[markus2025]

I’ve seen people try this method but it’s usually pretty hard to get right. Cutting out bricks one by one and slipping in a physical DPC can work, but it needs to be done very slowly and supported properly or you risk movement in the wall.

The bigger issue is that rising damp is often caused by bridging or high ground levels rather than the DPC itself failing. So before you go too far, it might be worth checking outside levels, debris in the cavity and any plaster bridging.

If you’re set on doing it, take tiny sections at a time and keep everything supported, but personally I’d get someone to have a look first just to make sure you’re fixing the right problem.

Thanks for the advice yeah the cavity was full of crap... the bricks in this house dont have sand and cement between them its like coal dust mix what they was trying meaning the bricks come out very easy you dont need to hammer so much to get them out as you would if they was sabd and cement.
Im about half way over the front of the house now , ive been doing sections of about 4/5 course a time and up to now ive not had any movement ive been making sure when putting the final brick back in that its well packed with a tuck pointer so the joint is back full

 

[markus2025]

Also to note im only doing this on the internal skin not both skins at oncs

 

[^woody^]

Yes this is a standard method of inserting a new DPC and is the most effective as long as the DPC is continuous - suitably lapped and there are no bridges from cavity debris or adjoining walls.

 

[markus2025]

Yeah i have kept one lenght of dpc all the way there is no joins in it

One issue i have is one of the internal brick walls goes right over the cavity and joins the external wall i dont know if it has been build like this for strengh or what ive the bottom section away but dont want to carry on detaching it all the way up if im doing wrong ?

 

[markus2025]

Pictures not the best but you can see how the white paper wall would go over

 

[markus2025]

This is grabbed off another page but is basically how its built at the moment my feeling is penetrating damp can come across from the external wall as there is no dpc method been using on the vertical run

 

[markus2025]

Following on from what ive said about looking at old plans i belive this is where the old front door used to be which has been bricked up so i could presume that the bridge of brick over the cavity would of been to close the cavity for the door opening so would there be any issue me taking all the end down a re tieing it into the inner cavity wall so its completely deatched from the outer skin

 

[Deluks]

Probably not, unless there's a specific issue at this point.