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Do you need to apply a slurry/priming mortar under the sill?
I have a partially basement retaining wall with Finja masonry block Exakt and then a row of regular masonry blocks before the wooden frame comes.
Various instructions state that masonry tops should always be plastered before sill, windows, etc. are mounted. Why should this be done at the sill? According to Finja's instructions, it is done to ensure wind and water tightness. But I don't see how I will make it more wind-tight with primer coating, rather the opposite. The smooth surface risks becoming uneven. And I don't understand how water would get in when the façade will be on the outside and extend down a few cm. In Finja's case, they illustrate with roof trusses which does not apply in my case.
Is it really necessary to do this before I install the sill strip+sill and then walls/floor joists?
Various instructions state that masonry tops should always be plastered before sill, windows, etc. are mounted. Why should this be done at the sill? According to Finja's instructions, it is done to ensure wind and water tightness. But I don't see how I will make it more wind-tight with primer coating, rather the opposite. The smooth surface risks becoming uneven. And I don't understand how water would get in when the façade will be on the outside and extend down a few cm. In Finja's case, they illustrate with roof trusses which does not apply in my case.
Is it really necessary to do this before I install the sill strip+sill and then walls/floor joists?
No input anyone?
When searching or having seen pictures before, I've never seen a grounded/slammed wall, but I've only seen people, for example, putting a row of lecablocks at the bottom, then comes lath paper and lath/frame. So I'm having a hard time motivating doing this but would love to hear someone's points of view.
The inside and outside of the walls should be slammed, but now I'm talking about the upper part. I don't question slamming windows that are exposed, but why before putting lath paper and lath?
When searching or having seen pictures before, I've never seen a grounded/slammed wall, but I've only seen people, for example, putting a row of lecablocks at the bottom, then comes lath paper and lath/frame. So I'm having a hard time motivating doing this but would love to hear someone's points of view.
The inside and outside of the walls should be slammed, but now I'm talking about the upper part. I don't question slamming windows that are exposed, but why before putting lath paper and lath?
Assume that nothing is absolute...
When I have laid the foundation, I can't get it exactly even. That is, one block or another sticks up/down a few mm.
I skim off mortar on the top with a straight board and thereby get the top edge "even" without uneven load, etc.
/ATW
When I have laid the foundation, I can't get it exactly even. That is, one block or another sticks up/down a few mm.
I skim off mortar on the top with a straight board and thereby get the top edge "even" without uneven load, etc.
/ATW
Okay, so you've done it for the unevenness. That probably falls under making it airtight. But you haven't done it for the water's sake? Honestly, I don't understand what they mean by water...
My sill is quite flat, so I don't need to even it out. It's +/- 2mm over an 11-meter stretch, but I'll never manage to even that out with foundation mortar. I primed the gable, which is more uneven, but only used lime brush, according to the instructions, and that didn't even anything out at all, so I'll use thicker sill insulation between the wooden wall and the wall.
My sill is quite flat, so I don't need to even it out. It's +/- 2mm over an 11-meter stretch, but I'll never manage to even that out with foundation mortar. I primed the gable, which is more uneven, but only used lime brush, according to the instructions, and that didn't even anything out at all, so I'll use thicker sill insulation between the wooden wall and the wall.
Construction veteran
· Åland
· 2 077 posts
And where did the foundation paper go?É ÉlPon said:Ok but then you've done it for the unevenness. It probably falls under making it airtight. But you haven't done it for the sake of the water? Honestly don't understand what they're referring to with water...
my sill is quite flat so no need to even out. It is +/- 2mm over an 11-meter stretch but I'll never manage to even that out with foundation mortar. I primed the gable which is more uneven but only used lime broom, according to the instructions, and it didn't even out anything at all so there I will use thicker sill insulation between the wooden wall and the wall.
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