Yes, you should.
The correct way is to install the frame/window in an unplastered wall and then plaster the reveals. Otherwise, there is a risk that you won't fit the frame into the opening.robban said:
The opening is likely made with the nominal standard measurement as a template, which is 15 mm larger than the outer frame measurement. A plaster layer is rarely less than 10 mm thick if it is to last. Usually, it's 15 mm. The plaster then overlaps 7-8 mm on the frame.
Therefore, install the frame first (make sure it is painted on the backside first, otherwise it will rot from the backside, there are special plugs for frame fastening in stone materials, ask for Fischer frame plug with screw), then backfill on the inside with a gasket of rubber/plastic and foam from the outside. Trim clean. Remove the gasket and seal the inside with elastic sealant. Then plaster the reveal on the inside and outside.
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Byggaren
If you still read the product description, you'll find the answer to why in it. If you then choose to ignore what's written, that's entirely up to you.
Which way is right? Well... who should you listen to? The manufacturer, some lazy bricklayer, or a "wise guy" online? It all depends on you in the end...
Take the opportunity to read all the material such as work instructions, etc., before you start, and you'll see that the questions become few
There is a reason the manufacturer has made instructions. I don't know about you, but I see no reason not to follow them. Possibly laziness or stinginess, then.
Which way is right? Well... who should you listen to? The manufacturer, some lazy bricklayer, or a "wise guy" online? It all depends on you in the end...
Take the opportunity to read all the material such as work instructions, etc., before you start, and you'll see that the questions become few
There is a reason the manufacturer has made instructions. I don't know about you, but I see no reason not to follow them. Possibly laziness or stinginess, then.
Why don't you read, for example, the work instructions that are available? Then you will get answers to all your questions...
but sure... excerpted from the instructions:
General
Note the need for wind tightness! A thin plaster (A-mortar) processed to full coverage normally meets the requirement for wind tightness. Always plaster the top and reveals of the wall. Do this before mounting sills, windows, or door frames.
Make it a habit, regardless of the masonry method, to seal the outer side of the wall, the top, and reveals with a thin plaster (A-mortar, max. 2 mm thick). The thin plaster is worked with a soft brush to full coverage. This ensures air tightness in the masonry and prevents ant colonies from establishing themselves.
Then how you do it in the end is, as mentioned, up to you.
but sure... excerpted from the instructions:
General
Note the need for wind tightness! A thin plaster (A-mortar) processed to full coverage normally meets the requirement for wind tightness. Always plaster the top and reveals of the wall. Do this before mounting sills, windows, or door frames.
Make it a habit, regardless of the masonry method, to seal the outer side of the wall, the top, and reveals with a thin plaster (A-mortar, max. 2 mm thick). The thin plaster is worked with a soft brush to full coverage. This ensures air tightness in the masonry and prevents ant colonies from establishing themselves.
Then how you do it in the end is, as mentioned, up to you.