We have a 1930s house where we are renovating the basement. We are chasing for hidden electrical wiring in the basement's concrete walls. The walls are plastered with lime plaster. What is suitable to use to fill in after the chasing? I would like something that doesn't sink and can handle at least a decimeter. It should also set/cure relatively quickly so I don't have to wait long before plastering. I also have a couple of through holes from old gas lines that need to be filled, can I use the same for these holes?
Thank you!
Thank you!
Just fill in the grooves with plaster. I assume these are not wider than a couple of centimeters, so just plaster on. If you have larger holes, take a piece of brick of suitable size and just mortar it in.S SJfunkis said:
Best answer
When it comes to filling out, and considering that you already have concrete blocks as a foundation, I would probably use a cement render. It's a little stronger.S SJfunkis said:
The holes where the boxes are placed are mostly taken up by the boxes, so I assume there's little left around the boxes? So it works well there too. You can fill out quite well with plaster; it works perfectly. Buy a cheap masonry and plaster mortar B and it will be perfect. Then you plaster on top with lime plaster. You don't need to wait until it is bone dry to plaster over, it's good if it still hasn't completely set. If you fill in the holes and grooves one day, it's perfect to plaster the next day.
Spray a little thinly with water on top if you want it to be extra good where you have filled in a bit thicker, otherwise it might develop fine cracks. Use a flower sprayer or something like that which can spray finely. You should start about 2 hours after you have finished plastering, as it will have set enough to hold.
But don't spray too much so it runs off
...just a bit finely so it stays moist.On the surface plaster with lime plaster, you don't need to spray water.
Hope this becomes your best answer. Good luck with the project!
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Super answer! Thanks!tompax said:
When it comes to filling in, and considering that you already have concrete blocks as a base, I would probably use a cement render. It's a bit stronger.
The holes where the boxes are mostly consist of the boxes, so I assume there's just a little left around them? So it works well there too. You can fill in quite well with render; it works perfectly. Buy a cheap wall and render mix B, and it'll be perfect. Then render on top with lime plaster. You don't need to wait until it's completely dry to render over, and it's actually better if it hasn't fully set yet. If you fill in the holes and grooves one day, it's perfect to render the next day.
Spray a little thin water on top if you want it to be extra good where you've filled in a bit thicker, otherwise, it risks becoming narrow cracks. Use a plant sprayer or something that can spray finely and thinly. You should start doing this about 2 hours after you have finished rendering because by then, it's set enough to hold.
But don't spray too much so it runs off just
On the surface render with lime plaster, you don't need to spray water.
Hope this is your best answer. Good luck with the project!