Rising damp (?) - internal walls

Paul_the_Painter

When I read the original post I didn't take in that the problem was with an internal wall, as such what I said was rubbish.

Damp could still be coming from leaking plumbing, or from a broken down DPC, if its a stud wall I'd rip it apart and have a look, but if any company is saying they would inject a chemical DPC you would have to assume it not a stud wall, so a new DPC may be the only solution.

Of course if a company is saying they will inject a chemical DPC into a stud wall hmmmmmmm

davsidipp

no i did not read this post properly as our damp was external sorry but i made a mistake i was giving an opinion on our external wall my mistake best ask proffesionals like weekend warrior who like a lot of posters result in being rude and wonder why people dont bother to post!

weekendwarrior

Why don't you re- read the full post again and then see who was rude first?

why is it unlikely on an internal wall are you an expert.

passingby_2

My house was built in 1880 (mid terrace) and I had a DPC done 16 years ago. Since it was done the plaster started to fall off the walls about a year after and all the outside walls seem to be damp. All the plaster has bubbled in various places and especially around the central heating pipes even on the main wall adjoining the lounge to the kitchen. All is fine on stud walls. I got the guy back who had done the damp course but he just said it was water coming down the walls from the roof (this I feel is nonsense as the roof has been re-done). The plaster is only coming off from where they replaced it (half way up the wall)....any ideas?

[Deleted User]

My garage is detached from the house. One wall at the end abuts next door's garden and the height difference beteen their garden floor level and mine is 2ft.

There is a small strip of land behind my garage in my garden which is just earth and too narrow for any usage, but my garage wall is very damp now up to about a foot high. I'm sure it's the earth - but how do I resolve this? I have not noticed it before and cannot remove the earth due to accessing it.

weekendwarrior

passingby wrote:

My house was built in 1880 (mid terrace) and I had a DPC done 16 years ago. Since it was done the plaster started to fall off the walls about a year after and all the outside walls seem to be damp. All the plaster has bubbled in various places and especially around the central heating pipes even on the main wall adjoining the lounge to the kitchen. All is fine on stud walls. I got the guy back who had done the damp course but he just said it was water coming down the walls from the roof (this I feel is nonsense as the roof has been re-done). The plaster is only coming off from where they replaced it (half way up the wall)....any ideas?

I don't suppose you got an insurance backed guarantee with it?

What type of damp proof course was it? electro osmosis or chemical?

If it was chemical, perhaps it was replastered too soon after the chemical was injected!

weekendwarrior

Deleted_User wrote:

My garage is detached from the house. One wall at the end abuts next door's garden and the height difference beteen their garden floor level and mine is 2ft.

There is a small strip of land behind my garage in my garden which is just earth and too narrow for any usage, but my garage wall is very damp now up to about a foot high. I'm sure it's the earth - but how do I resolve this? I have not noticed it before and cannot remove the earth due to accessing it.

There is not much you can do in this instance, removing the earth is the obvious answer, but you have already discounted that option.

There are many damp proof treatments that you could apply, but it is unlikely that they will work.

passingby_2

weekendwarrior wrote:

I don't suppose you got an insurance backed guarantee with it?

What type of damp proof course was it? electro osmosis or chemical?

If it was chemical, perhaps it was replastered too soon after the chemical was injected!

I did get a guarantee but the company have since moved and I can't find them.

It was a chemical unjected one. Do you think if I knock the plaster off and leave it for a month or so it would be ready to re-plaster?

My problem is that I want to knock the plaster off and re-plaster it but I'm worried it will just happen all over again. I just want to know who I should ask to look at it and tell me the truth as to why it has happened and how to fix it. I've had a few builders in all saying different things so now I don't trust any of them locally.

PS what causes plaster to become blown?

passingby_2

davsidipp wrote:

weekendwarrior wrote:

Lets just say I know the difference between an internal wall and an external wall.

Imagine a detached house it will have 4 external walls, normally cavity walls.

Then there will be numerous other "internal" walls that make the other rooms of the house so the likelyhood of a flower bed or gutter from causing the problem is unlikely, Unless you have a flowerbed or gutter in the adjoining room.

It's not exactly rocket science so why do I need to be an expert![/QUOTE our house was built before 1960 and has a solid wall not cavity wall so i guess you dont know what you are talking about. and for your info the proffesional who said we needed a french drain was a surveyor for our insurance company. bridging damp courses is a common problem with damp but damp companies are just out to sell there products to people who panic like we did with ours. our french drain has been done for 8years now and no damp has returned.

What's a, 'French Drain'? How does it work?

weekendwarrior

passingby wrote:

I did get a guarantee but the company have since moved and I can't find them.

It was a chemical unjected one. Do you think if I knock the plaster off and leave it for a month or so it would be ready to re-plaster?

My problem is that I want to knock the plaster off and re-plaster it but I'm worried it will just happen all over again. I just want to know who I should ask to look at it and tell me the truth as to why it has happened and how to fix it. I've had a few builders in all saying different things so now I don't trust any of them locally.

PS what causes plaster to become blown?

When the chemicals are injected the can cause the water in the bricks to be expelled and so if it has been plastered before the walls have dried out fully then this could of caused the problem.

How long were the walls left without any plaster, after the dpc was injected?

I would remove the plaster and leave a few weeks, get a cheap damp detector, test the wall and then get it replastered when you know it is dry.