Nitoproof Damp Prevention

11fernsroad

Hi

we have rising damp problem in our walls as there is no damp proofing done.

we were advised to remove the damaged plaster and then apply Fosroc Nitoproof damp protect mix over it and then once that coat is dry then to replaster over it.

But the chap who came to apply damp prevention mix seems to say we need to do plastering first and then apply Nitoproof damp prevention mix over it

Anybody who had done this before can give some guidance?

Thanks

stuart45

If you have gone back to brickwork it's more difficult to put a coating on it. You need a smooth sand/cement coat over the brickwork first.
However, it's probably the wrong method to use for a period property. Normally using a breathable lime plaster is a better method.

daveyjp

Ripping off plaster and applying damp proofing is generally not the correct approach.  It will work for a while, but if the source of the damp isn't identified and recitfied the problem will return.

11fernsroad

daveyjp said:

Ripping off plaster and applying damp proofing is generally not the correct approach.  It will work for a while, but if the source of the damp isn't identified and recitfied the problem will return.

Hi

we had also inserted dryrods at 10cm apart in the lowest mortar line.So that should take care of rising damp in long run.

Now we need to know to the sequence of applying damp protection coat and plastering.

Any thoughts

grumpy_codger

I'm no expert and had to google for 'dryrods':

When inserted into drilled holes in a continuous mortar course, they release silicone-based ingredients that diffuse into the mortar, creating a new, effective damp-proof course (DPC) to stop moisture from rising

If they really do exactly what it says on the tin, you probably don't need anything extra except giving the wall time to dry.

If they don't, your are just trapping the moisture inside the wall and this is unlikely to solve the problem.

gollum007

Oddly enough, neither damp rods, or plaster coatings will do anything useful whatsoever.

https://www.heritage-house.org/damp-and-condensation/managing-damp-in-old-buildings.html

Show the damp-proof salesman the door.....

stuart45

The problem with that website is the load of wrong information it contains. For example he talks about rising damp not existing in Holland, and the Dutch not even using a DPC. This is just one Dutch company that deal with rising damp. If you google Optrekkend vocht you'll find loads more. 
Optrekkend vocht behandelen: Werkwijze & Prijzen
I worked in the Building trade in Holland years ago, so I knew straight away he was talking rubbish.

plumb1_2

stuart45 said:

The problem with that website is the load of wrong information it contains. For example he talks about rising damp not existing in Holland, and the Dutch not even using a DPC. This is just one Dutch company that deal with rising damp. If you google Optrekkend vocht you'll find loads more. 
Optrekkend vocht behandelen: Werkwijze & Prijzen
I worked in the Building trade in Holland years ago, so I knew straight away he was talking rubbish.

I thought they used small boys fingers to stop houses get damp. 

😂sorry couldn’t resist 

gollum007

stuart45 said:

The problem with that website is the load of wrong information it contains. For example he talks about rising damp not existing in Holland, and the Dutch not even using a DPC. This is just one Dutch company that deal with rising damp. If you google Optrekkend vocht you'll find loads more. 
Optrekkend vocht behandelen: Werkwijze & Prijzen
I worked in the Building trade in Holland years ago, so I knew straight away he was talking rubbish.

A few companies peddling this rubbish is not the same as the massive scam industry that's sprung up in this country.

If you use any of these mythical cures, expect to be back in a few years when it predictably enough fails miserably to do anything useful....

stuart45

gollum007 said:

stuart45 said:

The problem with that website is the load of wrong information it contains. For example he talks about rising damp not existing in Holland, and the Dutch not even using a DPC. This is just one Dutch company that deal with rising damp. If you google Optrekkend vocht you'll find loads more. 
Optrekkend vocht behandelen: Werkwijze & Prijzen
I worked in the Building trade in Holland years ago, so I knew straight away he was talking rubbish.

A few companies peddling this rubbish is not the same as the massive scam industry that's sprung up in this country.

If you use any of these mythical cures, expect to be back in a few years when it predictably enough fails miserably to do anything useful....

There's as many companies in the rest of Europe as there is in the UK. Peter Ward seems to think that this is the only country in the world that uses this system. If he wants people to take him seriously, he should at least get his facts right.