Hello.
The construction mistakes of the 1990s are becoming increasingly obvious, quite literally. That was when the insulation boom began. We would have liked to apply a decorative plaster finish, but unfortunately had to quickly choose a painting company whose workers were not aware of the long-term effects of their methods. The insulation boards were fixed with what I would call plate anchors. Coaster-sized plastic discs held the insulation boards on the wall. Nowadays, these are usually glued.
It is clear that white plaster will darken over the years. However, due to the different material densities (plastic, base coat, and paint), numerous round spots become visible through the plaster around the house, which is also affected by green algae stains.
Now there are the following options. Continue living with it... could you do that? I would really be interested to know. Or redesign the facade. It might not be possible because of the insulation boards, or only feasible with high technical effort. Perhaps by using slate or brick slips (slates or facing bricks). Or replastering. Is there a plaster thick or dense enough to completely prevent the “plate anchors” from showing through again?
Regards, Sauerländer
The construction mistakes of the 1990s are becoming increasingly obvious, quite literally. That was when the insulation boom began. We would have liked to apply a decorative plaster finish, but unfortunately had to quickly choose a painting company whose workers were not aware of the long-term effects of their methods. The insulation boards were fixed with what I would call plate anchors. Coaster-sized plastic discs held the insulation boards on the wall. Nowadays, these are usually glued.
It is clear that white plaster will darken over the years. However, due to the different material densities (plastic, base coat, and paint), numerous round spots become visible through the plaster around the house, which is also affected by green algae stains.
Now there are the following options. Continue living with it... could you do that? I would really be interested to know. Or redesign the facade. It might not be possible because of the insulation boards, or only feasible with high technical effort. Perhaps by using slate or brick slips (slates or facing bricks). Or replastering. Is there a plaster thick or dense enough to completely prevent the “plate anchors” from showing through again?
Regards, Sauerländer
They are not grouted; instead, they are placed into the wet adhesive and then smoothed out with a brush, and that’s it. The thin brick slips make this method possible. Nothing should crack since the external thermal insulation composite system (ETICS) has reinforcement.
By the way, the brick slips are flexible and harden when combined with the adhesive. You can check this out on a pre-glued sample surface at a hardware store. Personally, I like it, even though I usually prefer natural stone looks. However, natural stone is simply too heavy for an ETICS, even when fixed with insulation anchors and additionally bonded.
By the way, the brick slips are flexible and harden when combined with the adhesive. You can check this out on a pre-glued sample surface at a hardware store. Personally, I like it, even though I usually prefer natural stone looks. However, natural stone is simply too heavy for an ETICS, even when fixed with insulation anchors and additionally bonded.
S
Sauerländer1 Sep 2016 18:27A few days ago, I applied an algae remover using a pump spray bottle. It worked quite well. However, the gable wall was still partly covered with brown stains caused by the roof tiles, when rain splashes color and dirt onto the gable wall.
I don’t want to just buy something randomly, so I prefer to ask you first, especially since I couldn’t find anything at the home improvement store today. Is there a concentrate that I can dilute with water to spray on the stained areas, which then works on cleaning by itself, similar to how algae removers function?
I don’t want to just buy something randomly, so I prefer to ask you first, especially since I couldn’t find anything at the home improvement store today. Is there a concentrate that I can dilute with water to spray on the stained areas, which then works on cleaning by itself, similar to how algae removers function?
This is not a construction defect, but rather saving in the wrong area, or simply a lack of knowledge. Some people experience this during construction, others during car repairs, or in other situations.
Depending on the adhesive and reinforcing mortar, you can often avoid using anchors. If the insulation needs to support additional loads beyond the plaster, for example natural stone window sills, anchors should be used at specific points.
Microscopic cracks exist in the plaster, which can expand to a greater or lesser extent depending on the material thickness and may absorb moisture. Where anchors are installed, the mortar layer is thicker, causing this unevenness. This often happens if the plaster is not painted afterward.
Good results can be achieved by painting the facade after applying the plaster with, for example, a "lotus effect" paint available from specialty suppliers, and having algaecides and fungicides mixed into the paint at the store. The lotus effect reduces water adhesion on the surface, while algaecides and fungicides prevent algae growth. Applying two coats ensures the job is done correctly.
The money spent on anchors would have been better invested in good paint. Lotusan G is an example of a good paint, but there are also other high-quality options.
Depending on the adhesive and reinforcing mortar, you can often avoid using anchors. If the insulation needs to support additional loads beyond the plaster, for example natural stone window sills, anchors should be used at specific points.
Microscopic cracks exist in the plaster, which can expand to a greater or lesser extent depending on the material thickness and may absorb moisture. Where anchors are installed, the mortar layer is thicker, causing this unevenness. This often happens if the plaster is not painted afterward.
Good results can be achieved by painting the facade after applying the plaster with, for example, a "lotus effect" paint available from specialty suppliers, and having algaecides and fungicides mixed into the paint at the store. The lotus effect reduces water adhesion on the surface, while algaecides and fungicides prevent algae growth. Applying two coats ensures the job is done correctly.
The money spent on anchors would have been better invested in good paint. Lotusan G is an example of a good paint, but there are also other high-quality options.
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