What is STO plaster?

[kibba]

Hello,

I am currently talking to two construction companies that are estimating our house build. We will have a plastered facade, "snutputs" - not pebble dash.

The framework will be in loose timber.

One suggests the conventional method with insulation board and plaster, while the other suggests using polystyrene board with STO plaster.

I understand that STO plaster is quite new on the market, right?

Please enlighten an uninformed person: advantages/disadvantages, what to consider, any price differences (which should be evident in the two quotes), what are your experiences?

Thanks for the info / Kibba

 

[MatildaSofia]

A company called that. Not new.
www.sto.se
Don't know if their plaster differs from others.
But I know they have a patented paint called Lotusan, saw it at a fair. Self-cleaning, so smart!

 

[Immobil]

Self-cleaning, so smart!

: Can it work? ???
:-/ Maybe time for a new thread. BetongMatilda tests. :-X ;D

 

[MatildaSofia]

: Can it work? ???
:-/ Maybe time for a new thread. BetongMatilda tests. :-X ;D

;D Prefer Miss Superfloor...
YES, it worked. I got to test and see the result with my own eyes.. Dirty a wall that was not painted with Lotusan and one that was..
The regular plaster color, the dust stuck and when you poured water on it got really dirty.
When the water hit the facade with Lotusan, it beaded and rolled the dirt away

 

[fasadgurun]

It works !!!!!!

The technology behind it is a silicone emulsion that repels water and dirt !!!!!

I have seen it myself.

Both STO and Caparol have this product!

The world's best base paint - keeps the base clean and neat!

 

[Tommy_S]

.. and when you want to repaint? (Thinking about silicon)

 

[MatildaSofia]

he paints himself.. yes, it's fantastic.

 

[Immobil]

it paints itself.. yes it's amazing.

: You believe in Santa too, right? ??? :-/

 

[fasadgurun]

.. and what about when you want to repaint? (Thinking about silicon)

it can be painted over with the same type of paint.

but you're also right, silicon in its pure form is impossible to paint over - but in the paint, it is apparently chemically bound in some way - I asked someone who knows, and he said the correct term is silikoisoerad ??

 

[Sweli]

Hello,

I am currently talking to two construction firms that are estimating our house build. We will have a plastered facade, "snutputs" - not spritputs.

The structure will be made of loose timber.

One proposes the conventional method with insulation boards and plaster, the other suggests foam boards with STO plaster.

I understand that STO plaster is something quite new on the market, right?

Please enlighten an uninformed person: advantages/disadvantages, what to consider, possible price differences (which should be reflected in the two quotes), what are your experiences?

Thanks for the info / Kibba

Both methods use a soft material for the plaster. This means you can never nail, screw, or hit the plastered wall without damaging the plaster.

We will soon plaster our dormers, and we put up BluClad boards, which are cement-based boards that can be plastered directly on.
This method is used a lot in large apartment buildings and large structures in Sweden, but it hasn't reached the residential market yet. Few know that it exists.
The board is also fireproof.
If you look at our website, you can see how the boards look in place.

For the balcony, we will use Pyroks boards, which are special for laying tiles on. These are also fireproof. You can use them for facades where you plan to have brick or other types of stone like Mexitegel.

BluClad can be found, for example, at Fredells. They have an exhibition showing how to plaster on them. You use, for example, Maxit plaster.
The advantage is that the cement-based plaster becomes one with the cement-based board. You can use pre-colored plaster or use uncolored plaster, which is then painted with silicate paint just like on concrete walls.

We have concrete walls on the ground floor that already have a plaster structure, so we will use uncolored plaster and then paint the entire house with silicate paint.

For those who want more information, I have PDF files with information about these boards that I can email over.

 

[Framerate]

Both methods use a soft material for the plaster. This means you can never nail, screw, or hit the plastered wall without damaging the plaster.

We are going to plaster our hives soon and we have put up BluClad boards, which are cement-based boards that can be plastered directly on.
This method is used a lot in large rental buildings and large structures in Sweden, but it has not yet reached the villa market. Few people know it exists.
The board is also fireproof.
If you look at our website, you can see what the boards look like in place.

For the balcony, we will use Pyrokskiva, which is special for laying tiles. This is also fireproof. You can use it for facades where you intend to have brick or other types of stone like Mexitegel.

BluClad is available for example at Fredells. They have an exhibition that shows how to plaster on them. For example, you can use Maxit plaster.
The advantage is that the cement-based plaster becomes one with the cement-based board. You can use already colored plaster or use uncolored plaster that is then painted with silicate paint just like on concrete walls.

We have concrete walls on the ground floor that already have a plaster structure, so we will use uncolored plaster and then paint the whole house with silicate paint.

For those who want to know more, I have PDF files with information about these boards that I can email over.

The thread was about a stick-built house, and I doubt that a rigid board is suitable as the only substrate for plaster in such a case. The cellular plastic used under Sto and for example Combimix Futura allows for the greater movement in the substrate that a wooden joist construction gives.
That it works on larger rental buildings and similar rigid structures is another matter, and I don't doubt that, but it naturally requires expansion joints. Even a smaller surface will probably work just fine.

 

[Sweli]

Framerate,

Before commenting, one should read some information. The method is indeed used on timber/frame houses.
If you search online for BluClad, you will see that it is used in, for example, Germany and England specifically on WOODEN HOUSES.

Here is what is stated on Lungberg.se, the company that imports the board from England.

Bluclad
Non-combustible, hygroscopic, and frost-resistant façade board made of fiber cement with a smooth front side and raw backside. The board is delivered with sawn, straight edges and a smooth front side. The board is surface treated to reduce moisture absorption, which is why it can be left untreated during the construction period (up to 6 months). The board's shape stability allows for joint-free installation during plaster façade construction and can also be used as a substrate for exterior tiling.

Here are pictures of houses in SWEDEN that used the method:


Hardly a concrete house



Here you can see a closer picture of the result:

 

[Framerate]

Framerate,

Before making a statement, one should read a bit of information.

And how do you know that I haven't done that?

I am skeptical about silent boards as the only base for plaster because a wooden house moves quite a lot, perhaps especially in our climate where both temperature and humidity can vary extremely over a year.

Time will tell. Maybe it is an excellent method even in Sweden. Maybe not.

 

[Sweli]

And how do you know that I haven't done it?

I'm skeptical of rigid boards as the sole substrate for plaster because a wooden house moves quite a bit, perhaps especially in our climate where both temperature and humidity can vary extremely over a year.

Time will tell. Maybe it is an excellent method even in Sweden. Maybe not.

I know you haven't read through your comments, for example, when you say "rigid boards as the sole substrate," and in a previous comment, you say "but it naturally requires movement joints," which is completely wrong.

Firstly, you should absolutely NOT use these boards as the sole substrate. The manufacturer explicitly states this in their description. As you can read in my posts, it says it is a JOINT-FREE construction.

 

[snickarboden]

Sweli>Can you describe the wall's construction? Please email me some info too... sounds really interesting.
snickarboden@hotmail.com

/Kent