problem wall
 

Good afternoon all. We have an internal wall that is external within the confines of the ajoining non occupied property. The paint has blown and appears visibly damp in areas {I assume causing the paint to blow}. Is there a barrier that can be added to paint, a specific paint, or any product of any description that can help to solve this problem? Would using an external paint inside be of any use?

Many thanks for your anticipated help. We are still learning the ins and outs of Spanish home maintenance. C:fingerscrossed:

Re: problem wall
 

You won't solve any damp problem by using any form of external or non-breathable plastico paint inside - you will merely disguise the problem for a short period of time and in doing so cause the structure of the wall itself to degrade and damp to climb upwards within the wall etc.
If you want to actually solve the problem, not disguise it, you need to take off ALL the old wall coating (render/plaster?) to expose the masonry beneath and re-render using a lime mortar. Lime mortars allow water vapour to harmlessly evaporate from the wall. Repaint using only distemper or other breathable paints. Keep furniture away from the wall in question (i.e. don't plonk a bookcase right up in front of it!) & heat and ventilate the room to allow harmless dispersal and evaporation of the water vapour.
An alternative way of "dealing with" damp walls is to construct a false wall in front of the affected one, incorporating a cavity, insulation if required, and a vapour barrier. This could be brick or stud partition.
If you have access to next door, first have a look to see that there is not anything more serious than "normal" rising damp causing the problem though.

Re: problem wall
 

thanks for the information:thumbsup:

Re: problem wall
 

Alternatively you could use the appropriate SIKA product. SIKA 1 is added to the render mix to provide a damp barrier and then SIKA TOPCOAT is applied before paintiung as normal.

However, as said previously, this doesn't solve the original ingress of damp. The only way to do that is to install a damp course (generally unknown in Spain) or to apply the above rendering to BOTH sides of the wall.

WE have a basement flat where we have usedf both methods (SIKA for one wall and a CAMRA wall for the other) - I favour the 'dummy', CAMRA wall but all this really does is to 'hide' the problem.

Best of luck, damp in Spain can be a real issue which the Spanish never really deal with properly (IMHO)!

Re: problem wall
 

? Not sure what you mean by this?
cámara de aire?
Basement (i.e. below ground) walls require different treatment to walls that are above ground but damp.

Re: problem wall
 

thanks:fingerscrossed::thumbsup:

Re: problem wall
 

a very interesting thread, and "right up my street" for once. Here are some linsk to stuff i have written in the past about damp and house problems, i hope some info is of help. :thumbsup:

http://www.neverpaintagain.co.uk/art...-effects-howto

http://www.neverpaintagain.co.uk/article/more-top-tips

http://www.neverpaintagain.co.uk/art...ring-tips-info

http://www.neverpaintagain.co.uk/art...e-masonry-wall

http://www.neverpaintagain.co.uk/art...g-damp-reissue

(the above are original articles by me on my site are NOT adverts! just in case anyone wondered) but if you look around the site there is far more info than on the links above.

Re: problem wall
 

Why don`t you read rule 9 and instead of promoting your site put the address in your sig ?

Re: problem wall
 

oh dear i was waiting for this. :confused:

amigo, i assure you my business is extremely successful and i dont need to advertise more than i already do, and i am well aware of the rules, which is why i didnt add the links with the editor thing and stuff loads of keywords in the links. The OP posted something highly relevant to my specialism. I was trying to help by showing links to the info they wanted instead of filling up the page with copies and pasted info, which being then duplicate content, would or may affect my website traffic.........

...............which is why i offered a but of pro help to the people thats is all, sorry. if the post i did is a no on then just delete it, sorry was only trying to be helpful :(

Re: problem wall
 

Not my call anymore, but I was just trying to help too. ;-))

Re: problem wall
 

As suggested I removed all old plaster and put a coat of Rehuetor plaster on it, then I painted it with a mixture of emulsion and clear varnish ( spanish tip) and had no probs since.