Brick up basement window

[geschmeck]

I will soon be bricking up a basement window to prepare for a bathroom build. I've never done any masonry work before, so tips and tricks are gratefully accepted.

I assume I will use Leca blocks and some form of mortar?

I'm thinking of leaving a few cm on the inside which I will fill with plaster later. On the outside, I thought the blocks should be flush with the foundation wall (later to be covered with insulation).

Should I "fill" the entire cavity with blocks? I also plan to insert a 125 mm pipe for a fan, I assume I just brick it in at a suitable spot with a slight outward slope?

Anything else I should consider?

Thank you in advance.

 

[gnuttisch]

I bricked up a basement window last autumn.

At that time, I used leca and some kind of mortar. I don't quite remember what. I left 1-1.5 cm around which I then filled with foam. This also glues the block in place. Then I plastered both sides.

Right or wrong, I don't know, but that's what I did.

 

[Stefan N]

Build with B-bruk and double in iron at the edges. Skip the joint foam, there's no point in it.

 

[gnuttisch]

I thought it was easier to seal with fugskummet.

 

[Blåbär69]

Reviving an old thread, hope that's okay.

How did it go?
I'm now going to do the same and I'm wondering about two things.

1. Should you chip away the old plaster around the hole before starting or can it stay?
2. How do you ensure you have enough mortar in the final layer on top of the block against the upper part? Sure, you can poke in mortar and try to press it in, but the mortar doesn't swell, so it has to be perfect for it to be sealed, right?

 

[Eld]

You should chip away all the weak and loose plaster in the hole. If it is painted, try to remove most of the paint even if the plaster underneath is strong. The mortar adheres poorly or not at all to paint. To get mortar into the top gap, use a pointing trowel. Place the mortar on a hawk or a float and scrape the mortar into the joint, it works really well.

And water thoroughly before you start masonry! It should be wet!

 

[Blåbär69]

Googled fogslev and then saw images of how it's done. Crystal clear once it's explained.
Thanks for the help!

 

[Blåbär69]

And as usual when starting something, there are follow-up questions...
The wooden pieces that go in the "ceiling," see image. (I don't know why the image is rotated, but the arrows are pointing upwards, nothing else.) Should they be covered in plastic, or is it okay to put the mortar directly against them? Is there any risk that they will absorb any moisture? Granted, they are a bit in, but it's best to ask.