Beware of quick advice, often valid for some, rich or with conditions different from yours !!
So think about it, find out and judge for yourself, especially since it's expensive !!.
Promote the cheapest and simple and effective.
Beware of fashions, in Canada, twice as cold, but much cheaper !!!
The pros sometimes scam !!
Check the quotes thoroughly, rules (see What to Choose, most quotes are illegal), area, exact details, otherwise you will get the scam of something other than shown but not written.
This, which the weakest and poorest get ripped off the most, messes me up !!
possible example for you to read:
We want to live in the attic, the floor area is 90 m2 and the area to be insulated (roof) approximately. 190m2
leaves you perplexed because the surface of a roof on a floor of 90m2 at 45 ° gives 90m2 / cos45 ° = 127m2 and inside 190m2 seems really a lot !! To be seen with care.
Often, depending on how you express yourself, with the right vocabulary or not, the quotes are very different !!Exactly like with garage owners.
First know how much you spend on heating per year with KWh precision and compare to other charges, such as housing and property taxes.
For me the taxes approach 3 times the heating. !!
So otherwise, for:
The windows: the problem is what I feel the air pass when I am near ... I was also told not to change them, first do exterior insulation.
you can locate the biggest leaks and
put inexpensive rubber gaskets of the right size on the top and bottom leaks to close them, on the cheap with a little patience and care.
price 100 to 300 € against 20000 € to change all the windows with double glazing, like my neighbor with the same house as me, who thus gains 1 ° C to 1,5 ° C !!!!
That you risk losing by discovering that you have to ventilate with VMC or pay and install a double flow.
On the other hand, thermal convection on a cold surface of the air circulates it and gives a cold sensation.
Give lots of specific details, which you don't seem to do easily.
External insulation costs 150 to 300 € per m2 over 300m2 at random for you !!! to divide the losses by three plus insulate the roof in addition and change the windows by moving them outwards to eliminate thermal bridges, i.e. € 45000 + € 2x20000 = € 85000 to the ladle !!
Except to do it yourself, but a lot of professional work !!
To be weighed in relation to the real gain and depreciation !!
More big progress is foreseeable in the future which will change the modes and choices, as in the past become absurd !!
1)
How to see what the walls are made of?
1a) First, simple,
hit it with your hand, fist or a hard object, small hammer, and
listen to the noise and feel whether it is soft or hard, this in different places !!
In fact, very useful rudimentary sound ultrasound !!
So hard and dry, it's plaster on cinderblock, so almost no insulation (case of the 50s to the 60s)
If moderately hard, but less dry, brick against the partition with an air gap or a little polystyrene, at the time 72 the top was 2cm!
Finally if soft enough, resonating easily, hollow, then plasterboard with polystyrene thickness to be determined.
Allez
educate your ear with friends knowing the insulation of their walls !!
1b) look in the corners, junctions towards crawling, basement, staircase, thickness of walls, etc ... there are always places where you can see the insulation and its thickness.
Ask friends to help you see these details.
1c) The thickness of the walls indicates the insulation:
20cm concrete block, plus 2cm outside of plaster and 2cm inside of plaster gives 24cm of thickness for almost nothing, only breeze block, light insulation, but at the top in the 50s !!!
The fashions are changing !!!!
If the wall is thicker the excess compared to 24 to 25 cm gives that of the insulation,
or plasterboard of 1cm with x of polystyrene, in 72, 3 to 5cm at the top for the electric for wall of 30cm ??
either 5cm of double partition brick + x of polystyrene or an air gap of 1cm.
1d) Finally, if still in doubt, a small hole drilled in the wall to fix something to the wall (4 to 8mm) allows you to drill up to the cinder block wall by seeing what comes out and to measure the thicknesses by drilling.
The answer takes longer to write than to do on the wall !!
