Hello.
I have been reading and searching for answers to my "problem" for several months.
Attached is a picture.
I have a house built in 1979, slab on grade with insulation on top as was built during that time, i.e., cold slab. NOT a basement house. NO insulation under the house. (sills with sill insulation (rubber strip underneath) measured in 2007, 2010, 2011 at different locations each time, low moisture values)
Today we have dug away all topsoil and excavated down to the footing about 25cm down along the slab.
Question 1:
What do I do now?
Insulate with pordrän says pordrän, but the strip will barely be 15cm if it should be
10cm below ground. The question is does it matter when the slab is cold and no insulation underneath? does a pordrän strip of 15cm do anything when the slab is cold Or tar the 25cm to prevent moisture in? (but then moisture can't migrate out)
Or platon to create an air gap? Is it possible at 20-25 cm, worthwhile?
But it's only 20-25cm height we are talking about here.
does it really make a difference whatever I do? Most people probably do nothing? No other similar houses in the area have done anything similar.
Question 2:
I'm also wondering how I should fill this up and with what?
The suggestion I have received is to fill up with NON-draining material and then lay slabs around the house that slope away from the house. To avoid getting rainwater into the drainage
(Drainage is located further down around the house and I will not dig it up)
I have been reading and searching for answers to my "problem" for several months.
Attached is a picture.
I have a house built in 1979, slab on grade with insulation on top as was built during that time, i.e., cold slab. NOT a basement house. NO insulation under the house. (sills with sill insulation (rubber strip underneath) measured in 2007, 2010, 2011 at different locations each time, low moisture values)
Today we have dug away all topsoil and excavated down to the footing about 25cm down along the slab.
Question 1:
What do I do now?
Insulate with pordrän says pordrän, but the strip will barely be 15cm if it should be
10cm below ground. The question is does it matter when the slab is cold and no insulation underneath? does a pordrän strip of 15cm do anything when the slab is cold Or tar the 25cm to prevent moisture in? (but then moisture can't migrate out)
Or platon to create an air gap? Is it possible at 20-25 cm, worthwhile?
But it's only 20-25cm height we are talking about here.
does it really make a difference whatever I do? Most people probably do nothing? No other similar houses in the area have done anything similar.
Question 2:
I'm also wondering how I should fill this up and with what?
The suggestion I have received is to fill up with NON-draining material and then lay slabs around the house that slope away from the house. To avoid getting rainwater into the drainage
(Drainage is located further down around the house and I will not dig it up)
Last edited:
Maybe I forgot to mention.
There has been a patio against one side of the facade for 30 years in a bad way, so we've experienced some frost damage in the plastered foundation due to leaves and such that have stayed damp against it and frozen in the winters. The foundation is poorly plastered on all the similar houses on the street. I thought to fix it first before building a new sun deck.
Then the previous owner had flower beds/grass against the house, which is not good, and the idea is to lay tiles around the house to remove some moisture that stays against the slab and make it easier to maintain with lawn mowing.
So the problem is:
Since I've already dug up, I wonder if there's a sensible solution to make the current setup "better", and also to find out what type of gravel I should fill in with along the house edge? (Draining or non-draining)
What I hope to achieve is less moisture impact on the slab with a sensible solution for the limited area.
That's what I'm wondering.
There has been a patio against one side of the facade for 30 years in a bad way, so we've experienced some frost damage in the plastered foundation due to leaves and such that have stayed damp against it and frozen in the winters. The foundation is poorly plastered on all the similar houses on the street. I thought to fix it first before building a new sun deck.
Then the previous owner had flower beds/grass against the house, which is not good, and the idea is to lay tiles around the house to remove some moisture that stays against the slab and make it easier to maintain with lawn mowing.
So the problem is:
Since I've already dug up, I wonder if there's a sensible solution to make the current setup "better", and also to find out what type of gravel I should fill in with along the house edge? (Draining or non-draining)
What I hope to achieve is less moisture impact on the slab with a sensible solution for the limited area.
That's what I'm wondering.
Last edited: