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damp problems
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By (user no longer on site) OP
over a year ago
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could be the wrong place to ask, but I've got a rental property.
It's end of terrace victorian circa late 1800's with a shared wall.
I seem to get a lot of damp on this wall (did my last damp -proof course around 15 years ago) now in order to avoid this happening again, what would happen if I put stud work up on that wall and then boarded and plastered instead of dot and dab or use base plaster coat and then finishing plaster.
It would create a gap is my thought process allowing water to drop to the bottom rather than causing damp and damaged plaster...
any advice would be much appreciated. |
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Is it an ingress of rain water coming through the wall, or rising damp.
It could also be a cold area attracting moisture.
Counter battening a wall with timber and plaster board will only disguise the problem for a couple of years. The timber will still rot. And the plasterboard will disintegrate from behind and smell musty like an old cellar.
Check the outside wall for cracks and holes, as water can track through from the outside quite a distance.
Also check that the external ground level is lower than the inside floor level.
Is the wall in question a solid wall, or has it a cavity that is being breached.
Better to determine the cause, and solve. Than to disguise the problem. |
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By (user no longer on site)
over a year ago
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No that would just cause a damp bridge. Get to the cause of it, check the guttering i presume it has a cellar. pop down and look at the wall condition down there make sure its not a swimmingpool down there.  |
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By *r TriomanMan
over a year ago
Chippenham Malmesbury area |
I had very bad mold in my bungalow as well as lots of condensation on the windows every morning, I thought about lots of solution and settled on a positive ventilation system. This over pressurises the property and drives air out (through natural gaps such as plug sockets).
The system I use is the Nuaire Drimaster one, it's made a massive difference to my home. |
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By *ruebameMan
over a year ago
from the womb and tryout to get back |
Don't mask the problem its hard to give advice without seeing the actual problem also what damp proofing did they use as some are a waste of money like the cream injection
Silicone injection shouldn't fail also what did they use to re plaster wall did they have sbr in the sand cement mix is it actually damp or is it salting coming out the plaster
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Get it checked out by a professional.
It could be a number of things as simple as earth up against the wall above dpc or faulty/missing pointing.
Guttering, dpc, cavity bridge......
If it's non of those then possibly condensation damp caused by lack of air circulation,poor insulation.
Is it surface mould or damp with a visable tidemark?
Put a pencil mark if so to monitor the damp see if it grows.
Get professional advice.
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By (user no longer on site)
over a year ago
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Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming. |
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"could be the wrong place to ask, but I've got a rental property.
It's end of terrace victorian circa late 1800's with a shared wall.
I seem to get a lot of damp on this wall (did my last damp -proof course around 15 years ago) now in order to avoid this happening again, what would happen if I put stud work up on that wall and then boarded and plastered instead of dot and dab or use base plaster coat and then finishing plaster.
It would create a gap is my thought process allowing water to drop to the bottom rather than causing damp and damaged plaster...
any advice would be much appreciated."
I need some more info from you
a damp proof course dosnt take into account of old propertys
cavity fed vs soil filled
soil filled and your damp course means nothing
upstairs vs downstairs as you dont say where your problem is
near a window / under a window
note your way will create wetrot and dry rot and you dont want that in your house |
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming. "
Could that be used to seal a floor. The last owner lay a concrete floor using cement high in salt content, salt is rising and breaking the seal of cement ? |
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming. "
just so you know that rendering and skimming can and does cause rising damp or even damp once water gets behind that cement the freezing weather will crack the lot off the wall |
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming.
Could that be used to seal a floor. The last owner lay a concrete floor using cement high in salt content, salt is rising and breaking the seal of cement ?"
the proper name for what your describbing is this Efflorescence
and it depends on whats been done with your building |
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By (user no longer on site)
over a year ago
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming.
Could that be used to seal a floor. The last owner lay a concrete floor using cement high in salt content, salt is rising and breaking the seal of cement ?"
Yes, I’ve used it on floors as well as walls. |
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By (user no longer on site)
over a year ago
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming.
just so you know that rendering and skimming can and does cause rising damp or even damp once water gets behind that cement the freezing weather will crack the lot off the wall "
The Op is talking about an interior wall, so it’s highly unlikely to freeze, when I say highly unlikely, there’s no chance. The product I referred to stops any moisture going through the wall, so damp won’t penetrate the render plasterboard, skimming whatever is used. Obviously if plasterboard is dabbed on you can’t then drill holes etc as you break the seal, rising damp is a different issue that needs to be addressed Separately. |
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By (user no longer on site)
over a year ago
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming.
Could that be used to seal a floor. The last owner lay a concrete floor using cement high in salt content, salt is rising and breaking the seal of cement ?
the proper name for what your describbing is this Efflorescence
and it depends on whats been done with your building "
I’m not sure what you mean by ‘depends what’s being done with the building’. The product is used to seal concrete floors, it prevents any damp penetrating the seal, usually insulation is laid on top and then it’s either screeded with sand and cement, or floor boards are laid straight on to the insulation. |
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By (user no longer on site) OP
over a year ago
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming.
just so you know that rendering and skimming can and does cause rising damp or even damp once water gets behind that cement the freezing weather will crack the lot off the wall
The Op is talking about an interior wall, so it’s highly unlikely to freeze, when I say highly unlikely, there’s no chance. The product I referred to stops any moisture going through the wall, so damp won’t penetrate the render plasterboard, skimming whatever is used. Obviously if plasterboard is dabbed on you can’t then drill holes etc as you break the seal, rising damp is a different issue that needs to be addressed Separately. "
I dont think it’s rising damp as its quite patchy and not all over.
It is the shared wall with the neighbour, whose house is slightly higher. Can damp proof courses fail in places over time? |
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming.
Could that be used to seal a floor. The last owner lay a concrete floor using cement high in salt content, salt is rising and breaking the seal of cement ?
the proper name for what your describbing is this Efflorescence
and it depends on whats been done with your building
I’m not sure what you mean by ‘depends what’s being done with the building’. The product is used to seal concrete floors, it prevents any damp penetrating the seal, usually insulation is laid on top and then it’s either screeded with sand and cement, or floor boards are laid straight on to the insulation. "
really you should keep your coments shut until you have more info
has it been screeded you dont know its just a concrete floor no mention of a screed being used
salt can rise through concrete not only because concrete produces it but also the surface its laid upon can cause it as well
also known as bleed through |
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so lets talk about your loverly vandex product
also known as tanking
have you ever seen the damage it does once you seal it in to the brickwork or stonework
better known as brick/stone rot where the stone or brick turns to powder because its so wet with no where to go
your house is stood on it once that brick turns to powder it sinks
yeah loverly product isnt it |
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"I dont think it’s rising damp as its quite patchy and not all over.
It is the shared wall with the neighbour, whose house is slightly higher. Can damp proof courses fail in places over time?"
so yours would be the lower terrace whilst next door is the raised higher terrace with the seperating wall seen above the roof ?
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Damp gathers/starts on the coldest areas.
Someone else has mentioned ventilation.
Most likely there’s no form of ventilation in the room ?
Do the doors have an undercut/gap at the bottom or is it tight to the carpets ?
Is there background ventilators/small vents on the window ? Are they open ?
You need a certain number of air changes per hour in a room to stop the build up of condensation which leads to damp.
Definitely get a few different companies round to assess the work. Do not board over the damp !
I’ve seen kitchens without an extract fan and when they stripped the old kitchen out to fit a new one, there was damp all over the walls. |
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By (user no longer on site)
over a year ago
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"Is the wall brick or stone, if it’s brick what condition are the bricks in, is it exposed to the weather or is it an internal wall, is it caused by rising damp. You can get a waterproofing product called Vandex that you put on the wall before rendering and skimming.
Could that be used to seal a floor. The last owner lay a concrete floor using cement high in salt content, salt is rising and breaking the seal of cement ?
the proper name for what your describbing is this Efflorescence
and it depends on whats been done with your building
I’m not sure what you mean by ‘depends what’s being done with the building’. The product is used to seal concrete floors, it prevents any damp penetrating the seal, usually insulation is laid on top and then it’s either screeded with sand and cement, or floor boards are laid straight on to the insulation.
really you should keep your coments shut until you have more info
has it been screeded you dont know its just a concrete floor no mention of a screed being used
salt can rise through concrete not only because concrete produces it but also the surface its laid upon can cause it as well
also known as bleed through "
Oh dear, I was trying to keep things pleasant, I was a builder for 24 years, specialising in all aspects of masonry, so the words ‘granny’ and ‘eggs’ spring to mind. I’m merely offering the op advice. I’m not here to try and out do you with my building knowledge. |
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"so yours would be the lower terrace whilst next door is the raised higher terrace with the seperating wall seen above the roof ?
Yes! Thats it!"
then answer these questions
Is the roof joint to the wall lead seal ( lead flashings ) or stone seal
Has next doors wall been pointed up above the roof
Has next door been stone cleaned silly question but once the stone has been cleaned its pourous so losses its water repellent side of it
also known as black stone |
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"Oh dear, I was trying to keep things pleasant, I was a builder for 24 years, specialising in all aspects of masonry, so the words ‘granny’ and ‘eggs’ spring to mind. I’m merely offering the op advice. I’m not here to try and out do you with my building knowledge. "
lets just Im still in the building trade
but going back to the ops reference
" The last owner lay a concrete floor using cement high in salt content, salt is rising and breaking the seal of cement ?"
vandex would work unless you have any rising damp problems then it would rise at the walls
its also an expensive product that would also need to be floored as well something I wouldnt advise
if you are walking on it you can use a floating floor instead and use an alternative that allows you to hide and allows the floor to breathe
but you dont say what you use it for |
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By (user no longer on site) OP
over a year ago
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"As you say ! this is a rental property. Is it not your landlords responsibility."
I am the landlord! I need a solution where I can fix something once rather than have to fork out every 6-12 months! |
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By (user no longer on site)
over a year ago
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"As you say ! this is a rental property. Is it not your landlords responsibility.
I am the landlord! I need a solution where I can fix something once rather than have to fork out every 6-12 months!"
Mr Rigsby you damp could be caused by a number of issues however dampness on any masonry wall which extends 1 metre above ground level is unlikely to be rising damp.
Is the floor solid or a suspended timber floor?
When you last had a dpc installed did you follow the replastering specification? The use of broad based gypsum products can cause moisture capture.
Lots of things to consider and best to ask a specialist in the field to come have a look. |
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"As you say ! this is a rental property. Is it not your landlords responsibility.
I am the landlord! I need a solution where I can fix something once rather than have to fork out every 6-12 months!"
still not answered my questions
there is a reason why im asking |
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"As you say ! this is a rental property. Is it not your landlords responsibility.
I am the landlord! I need a solution where I can fix something once rather than have to fork out every 6-12 months!"
Mate just get a damp proof specialist in or a decent builder.
Damp can be caused by many issues and if misdiagnosed costly.
Get two or three opinions as this thread proves opinions are like assholes, everyone has one.
As I said previously, you can do some simple visual check's yourself like looking at the condition of the brickwork/pointing externally, guttering, flashing if any present,the roof and the ground.
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so yours would be the lower terrace whilst next door is the raised higher terrace with the seperating wall seen above the roof ?
Yes! Thats it!"
That's possibly a gap or crack between your roof & his wall that's causing it especially on a 18th century buildings....only bit that putting me off that is you say it's patchy, unless the water is running down different channels within the wall.
Might be an idea to check what your neighbour has against that wall, could be a leak from their kitchen/bathroom...happened in my mums & never noticed for years til my sis moved out & drier wasn't getting used as often. |
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By (user no longer on site)
over a year ago
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I think you've got your answer OP.
DO NOT plasterboard over it using any method, and
DO get a professional damp surveyor to have a look at it and get it repaired as soon possible.
Good luck and hope it gets sorted. |
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Pardon me if this has been asked before ... but you say it's the party wall you're getting damp on?
Are your neighbours on the other side having the same problem?
It would be unusual for a party wall to have damp problems and not the other walls.
Upstairs, downstairs or both? |
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By (user no longer on site) OP
over a year ago
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"As you say ! this is a rental property. Is it not your landlords responsibility.
I am the landlord! I need a solution where I can fix something once rather than have to fork out every 6-12 months!
still not answered my questions
there is a reason why im asking"
Will do on saturday, I live in a different city and it’s three stories tall so not always easy to see the roof, even from the street! |
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Op just out of curiosity are there any pipes coming out of the walls ,just thinking you might have a burst pipe,and is it just the ground floor wall that's damp or are all the adjoining walls damp as one other poster said maybe check gutters and down pipes for blockages |
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By (user no longer on site)
over a year ago
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"could be the wrong place to ask, but I've got a rental property.
It's end of terrace victorian circa late 1800's with a shared wall.
I seem to get a lot of damp on this wall (did my last damp -proof course around 15 years ago) now in order to avoid this happening again, what would happen if I put stud work up on that wall and then boarded and plastered instead of dot and dab or use base plaster coat and then finishing plaster.
It would create a gap is my thought process allowing water to drop to the bottom rather than causing damp and damaged plaster...
any advice would be much appreciated."
I really hoped this thread was gonna be about woman's knickers |
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By (user no longer on site) OP
over a year ago
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"Op just out of curiosity are there any pipes coming out of the walls ,just thinking you might have a burst pipe,and is it just the ground floor wall that's damp or are all the adjoining walls damp as one other poster said maybe check gutters and down pipes for blockages"
I mean small bits of condensation all over the place, but the shared wall is where it is mainly. |
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By (user no longer on site)
over a year ago
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"could be the wrong place to ask, but I've got a rental property.
It's end of terrace victorian circa late 1800's with a shared wall.
I seem to get a lot of damp on this wall (did my last damp -proof course around 15 years ago) now in order to avoid this happening again, what would happen if I put stud work up on that wall and then boarded and plastered instead of dot and dab or use base plaster coat and then finishing plaster.
It would create a gap is my thought process allowing water to drop to the bottom rather than causing damp and damaged plaster...
any advice would be much appreciated.
I really hoped this thread was gonna be about woman's knickers"
Your still typing which is a miracle in its self! |
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"Pardon me if this has been asked before ... but you say it's the party wall you're getting damp on?
Are your neighbours on the other side having the same problem?
It would be unusual for a party wall to have damp problems and not the other walls.
Upstairs, downstairs or both?"
pre 1920s the walls was built different more so with raised party walls
which has a void between them
after 1920s they was built 4 bricks wide but joined together as one wall
a party wall can be 3 bricks wide
70s walls changed to 3-2 bricks wide
80s onwards 2 bricks wide part of the reason you can hear next door clear as day like your in the same room as them |
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