Did67 wrote:Obamot wrote:I repeat myself: the drapes / curtains have only a comfort effect, they do not prevent the heat from dispersing outside the building. Amha it's peanut ....
1) Comfort, isn't that what we're looking for when we heat ??? Personally, I don't care about the temperature; I prefer to have 19 ° C and "hot" than "21 ° C" and "cold"!
And comfort, we forget it too much, it's not just the temperature. It is also the perception, by the skin, of the radiations! (and it also depends on the humidity, the movements of air ...).
Sorry to note a slight contradiction (in all good honor, not shoot ... lol). Nothing prevents having one AND the other (warmer AND greater comfort, it's not antagonistic, it all depends on the measures taken) ...
Did67 wrote:So OK, the curtains do not isolate (in the direction conduction), but they allow to have a better comfort with a temperature equal or even lower ...
2) Even if the "air gap" between curtain and window is not really captive (everything depends on the nature of the curtains, the shapes of the frame), it is all the same a small "stamp", a "retarder" ...
Having been confronted with several houses with this type of recurring problem, it is possible to solve it in several ways which the cumulative ones with the others arrive at a better overall result. This is what to see.
As you point out yourself: it's onlya small "stamp" retarder (although I say no). Because, like it or not, it passes as much air through a half-open door as through a wide open door, due to the effect of the "air draw". Graphics are fine, but it's static and doesn't take this parameter into account at all.
Did67 wrote:3) The heat does not escape from the house only by conduction. It is also "radiated". Without a curtain, these rays will be "inetercpted by the shutter (if there is any and if they are closed), so on the outside. With curtains, part of it will be through the curtain, so inside.
No, no and no, that's a pure view of the mind. You have to see a construction as a whole.
Did67 wrote:Of course, everything depends on the size of windows, the nature of the glazing (double, triple, normal glass, low emissivity glass, etc ...)
That: oooooohh that YES! But not only.
Did67 wrote:Anyway, I teach my children to close the shutters, and where there are, to draw the curtains! It makes at least a little sport.
It shows that you don't really believe what you write. Are you from the construction industry and from which trade?
Here are some measures that I have found beneficial, and applied in cases of houses where you cannot control the renovation, either for reasons of cost or because you are simply a tenant.
1) To isolate ... you have to isolate yourself! 'Sieur de La Pallisse could not have said it better ...
2) Let's start with the circulation of air (at the origin of the biggest problem of discomfort ... since it also transports humidity) and ESPECIALLY heat exchange.
Everything must be sealed, the air must NO longer pass at all. With a silicone stick-gun: because the air passes through the electrical ducts
- dismantle the sockets and seal inside the electrical tube AND in the sheath housing in the wall.
- dismantle the ceiling lights and do the same.
- install "L" door sills to block the passage of air (in PVC or wood ... and especially not in aluminum or metal) where it is necessary => in principle the entrance doors between interior / exterior, including French window. Once installed, carefully put a hollow body gasket ("d" profile ... not the letter "D" the "d" profile) all around and cut the joint in a bizeau shape to make it penetrate inside of the starting section (change the seal when it is "cooked", ie between three and five years). Do the same on the window frames and even double (a seal on the frame side which comes to rest on a seal on the upright side) put cellophane as double glazing as explained above or in the other post.
- locate the ventilation ducts and seal them (except the bathroom where it is necessary to be able to open and close depending on the degree of use, the same for all bathrooms: laundry room, kitchen => in principle everything must be "closed "when the room is not in use or there is not too much moisture release).
- install boxes, above the blind boxes, providing a space for insulation. Provide a polypropylene sleeve to isolate the duct from the blind rod if necessary.
- the terracotta brick walls must be insulated by foam injection, as well as all the interstices of circulating air to make this air completely trapped in all circulation.
- also dismantle all the complaints and screws in buffers in the brick walls, or "hollow" wall, to inject foam under pressure in spray.
— Last but not least if air still passes under the front door, you can slide a pre-cut PVC floor board to create a "plug" to prevent air from circulating.
- also watch out for the keyholes, or unsuspected quantities of air can circulate, especially in window door locks ... real strainers (fill the interstices with grease ... if necessary ... this will block the 'air...). Old locks which are not of the Yale type should be banned. In Yale, you can leave a key to prevent air from circulating with the outside (it is also recommended to lock yourself up for the night for your own safety ...)
3) Floor insulation:
- pvc or carpet in all rooms, including kitchen, bathroom, laundry room .... Unless it is wooden parquet, but then there is a need to dismantle all the complaints and door thresholds, to see if there is in places where air passes (screws or parquet adjustment, for example) as above => silicone ...
4) Inlet and outlet pipes
- water, waste water, ventilation duct, chimneys, etc., to be insulated if they are not made of PVC.
5) Windows and French windows
Examine if you have cold bridges (for example shelf or aluminum or metal uprights) and air passage in the frame ...
And finally insulate the large cold bridges from the inside (for example with insulation protected by creased-crested). You can also buy a small electric dehumidifier to dry the air. Comfort guaranteed (there are small air conditioning units on casters which also dehumidify).
Here, Lumberjack will complete if I forgot something. These are relatively simple and inexpensive measures to do if you do not want (cannot) undertake big jobs. All these measures taken together will give you a much greater cost than curtains ... which can complete the picture if it pleases you.