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wernersen30002 Mar 2010 12:40Hello!!
I had a turnkey house built. Gypsum plaster was used for the walls, which is very smooth. My question is: if I want to install wall tiles, how should I prepare the wall? The use of a primer is clear, but does the wall need to be roughened, or can I tile directly onto the smooth gypsum plaster?
Thank you in advance.
I had a turnkey house built. Gypsum plaster was used for the walls, which is very smooth. My question is: if I want to install wall tiles, how should I prepare the wall? The use of a primer is clear, but does the wall need to be roughened, or can I tile directly onto the smooth gypsum plaster?
Thank you in advance.
A
AallRounder2 Mar 2010 16:54Hello, there are special tile adhesives designed for gypsum substrates,
for example from PCI. According to the manufacturer, a primer is sufficient, so no sanding is necessary. What really matters is which product you choose and what the manufacturer recommends for a gypsum substrate. You might also want to consider a suitable waterproofing system at least in splash water areas, since gypsum plaster is probably not intended for permanent moisture exposure. PCI offers numerous systems for so-called bonded waterproofing.
Best regards
for example from PCI. According to the manufacturer, a primer is sufficient, so no sanding is necessary. What really matters is which product you choose and what the manufacturer recommends for a gypsum substrate. You might also want to consider a suitable waterproofing system at least in splash water areas, since gypsum plaster is probably not intended for permanent moisture exposure. PCI offers numerous systems for so-called bonded waterproofing.
Best regards
H
hausbauer19723 Mar 2010 07:42Tiling on Smooth Gypsum Plaster
Hello, it clearly would have been better if the plasterer had known where you wanted to install tiles. Then they could have simply scraped those areas, leaving a nicely rough surface. Now it is smooth, and you will need to roughen the substrate again using quartz sand-containing primers.
But no problem—use PCI or equivalent products, and you will find information in the technical datasheets. In wet areas and corners, you should also apply reinforcing mesh; a lot has improved in this area for tiling.
Regards,
hausbauer1972
Hello, it clearly would have been better if the plasterer had known where you wanted to install tiles. Then they could have simply scraped those areas, leaving a nicely rough surface. Now it is smooth, and you will need to roughen the substrate again using quartz sand-containing primers.
But no problem—use PCI or equivalent products, and you will find information in the technical datasheets. In wet areas and corners, you should also apply reinforcing mesh; a lot has improved in this area for tiling.
Regards,
hausbauer1972
Hi,
First, apply a bonding and primer coat. With today’s high-quality branded adhesives, it usually doesn’t need to be mixed with quartz sand. The main thing is to avoid using any “cheap” products and to stick to one manufacturer’s system from bonding primer through waterproofing, adhesive, and grout to be on the safe side. The mentioned PCI brand is a good starting point.
After priming (PCI Gisogrund), you can waterproof wet areas and the floor with a liquid membrane (PCI Lastogum) and seal corners with waterproofing tape (PCI Pecitape) to prevent water infiltration. Then apply adhesive (PCI Flexmortar) and set your tiles.
Grout after 24 hours with PCI Aquafug, and once dry, seal the connection joints with PCI Silcofug E.
Done.
No guarantee for anything forgotten……
Regards,
Dirk
First, apply a bonding and primer coat. With today’s high-quality branded adhesives, it usually doesn’t need to be mixed with quartz sand. The main thing is to avoid using any “cheap” products and to stick to one manufacturer’s system from bonding primer through waterproofing, adhesive, and grout to be on the safe side. The mentioned PCI brand is a good starting point.
After priming (PCI Gisogrund), you can waterproof wet areas and the floor with a liquid membrane (PCI Lastogum) and seal corners with waterproofing tape (PCI Pecitape) to prevent water infiltration. Then apply adhesive (PCI Flexmortar) and set your tiles.
Grout after 24 hours with PCI Aquafug, and once dry, seal the connection joints with PCI Silcofug E.
Done.
No guarantee for anything forgotten……
Regards,
Dirk
A
AallRounder3 Mar 2010 20:24What BAUFLEX has already described
is the "composite waterproofing" I mentioned, which I would apply generously on the gypsum substrate that I consider to be critical, to make absolutely sure that the plaster does not get damaged.
In my opinion, composite waterproofing is an advanced solution because it places the waterproofing layer as far outward as possible. In contrast, waterproofing according to DIN standards is weaker since moisture is only blocked in the lower layers ("damp screeds/walls under tiles").
However, composite waterproofing is not part of the DIN standards, yet it is still used successfully. This is an example that solutions not compliant with DIN can still work well.
Regards
is the "composite waterproofing" I mentioned, which I would apply generously on the gypsum substrate that I consider to be critical, to make absolutely sure that the plaster does not get damaged.
In my opinion, composite waterproofing is an advanced solution because it places the waterproofing layer as far outward as possible. In contrast, waterproofing according to DIN standards is weaker since moisture is only blocked in the lower layers ("damp screeds/walls under tiles").
However, composite waterproofing is not part of the DIN standards, yet it is still used successfully. This is an example that solutions not compliant with DIN can still work well.
Regards
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