Hello everyone,
A few years ago, we purchased a very old house and renovated it extensively ourselves—at least the interior is now fully and successfully completed.
Now we are planning the exterior renovation.
Three sides of the house have a smooth plaster finish and are painted with an unknown type of facade paint, while the fourth side is made of facing brickwork. According to the neighbors, the paintwork was applied back in the early 1980s and supposedly consists of a water-based primer followed by two topcoats.
The paint surface is very smooth and adheres extremely well to the facade. The very few areas of flaking lead me to suspect a silicone or silicate-based paint. The total painted facade area is about 200 sqm (2,150 sq ft).
At a remote spot on the facade, I tested applying cement slurry, plaster, and even tile adhesive, leaving them on for several months before attempting to remove them. They could be removed very quickly and completely without residue using a damp plaster sponge. In short, nothing seems to stick to the old paint.
However, I have no practical experience with facade paints and would therefore appreciate your advice on the following issues and questions:
1. How can one determine which type of facade paint was originally used?
2. How can this existing facade paint be removed or pretreated in order to apply a new paint system?
3. If removing the old paint is not necessary—which I doubt—what type of paint base would generally be suitable for repainting?
Thank you in advance for constructive ideas and shared experiences!
Best regards
Frank
A few years ago, we purchased a very old house and renovated it extensively ourselves—at least the interior is now fully and successfully completed.
Now we are planning the exterior renovation.
Three sides of the house have a smooth plaster finish and are painted with an unknown type of facade paint, while the fourth side is made of facing brickwork. According to the neighbors, the paintwork was applied back in the early 1980s and supposedly consists of a water-based primer followed by two topcoats.
The paint surface is very smooth and adheres extremely well to the facade. The very few areas of flaking lead me to suspect a silicone or silicate-based paint. The total painted facade area is about 200 sqm (2,150 sq ft).
At a remote spot on the facade, I tested applying cement slurry, plaster, and even tile adhesive, leaving them on for several months before attempting to remove them. They could be removed very quickly and completely without residue using a damp plaster sponge. In short, nothing seems to stick to the old paint.
However, I have no practical experience with facade paints and would therefore appreciate your advice on the following issues and questions:
1. How can one determine which type of facade paint was originally used?
2. How can this existing facade paint be removed or pretreated in order to apply a new paint system?
3. If removing the old paint is not necessary—which I doubt—what type of paint base would generally be suitable for repainting?
Thank you in advance for constructive ideas and shared experiences!
Best regards
Frank
S
schwarzmeier14 Jan 2013 09:52fperao schrieb:
Hello everyone,
A few years ago, we bought a very old house and carried out an extensive internal renovation ourselves over several years – at least the interior is now completely and successfully finished.
Now we are planning the exterior renovation.
Three sides of the house have a smooth plaster finish and are painted with an unknown facade paint, while the fourth side is made of facing brickwork. According to the neighbors, the paint was applied back in the early 1980s and is said to consist of a water-based primer and two topcoats.
The paint is very smooth and adheres incredibly well to the facade, with very few flakes, which suggests to me that it might be a silicone or silicate-based paint. The painted surface area is about 200 sqm (2,150 sq ft).
At a remote spot on the facade, I performed a test by applying cement slurry, plaster, and even tile adhesive, leaving them on for several months before trying to remove them. Essentially, removal was quickly and completely achieved with a wet plaster sponge. In short – nothing seems to adhere to the old paint.
However, I have no practical experience with facade paints and therefore need your advice on how to solve the following issues and questions:
1. How can I determine which type of facade paint was originally used?
2. How can this facade paint be removed or prepared to allow a new coat to be applied?
3. If it turns out that removal is not necessary – which I doubt – what type of facade paint base would generally be suitable for repainting?
Thank you in advance for any constructive ideas and shared experiences!
Best regards
FrankMany professional painters face this problem. How should a layperson identify the binder type of an old facade coating? It is advisable to hire a qualified master painter or better yet, a certified expert in the painting trade.