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DIY Triple glazed and double glazed windows? Answered

Is it feasible to create double glazed or triple glazed windows at home where one can not fill-in the special gases between the gaps but just create triple or double layered glass panels.
Will it help to create a wall between extreme temp differences?

What are the possible alternatives to commercial  TG and DG windows?

thank you for your answers



Best Answer 4 years ago

The secret to double glazing is not the gas in the gaps (it's usually just dry air), but the gaps themselves.

Heat is lost through a pane of glass by conduction, but it is transferred from the room to the glass itself by convection. If you can trap air, you cut convection and, therefore, heat loss. The thin layer of air inside double/triple glazing is too narrow to convect easily.

The best DIY way to trap the air is in small bubbles of a poor conductor, such as bubblewrap or with closed curtains, but both of these tend to spoil your view through the window, so, instead, you can add extra panes of glass, perspex or transparent film yourself.

There are commercially-available heat-shrink films, but if you are just adding it to a room used rarely, or that already has a view you don't care about (say, onto a brick wall), then it is just as effective to use sticky tape to add layers of cling film ("Saran wrap"), or to resort to the previously-mentioned bubblewrap.

Josehf Murchison

4 years ago

Yes you can make double and triple glazed at home.

However If you are not going to use an inert gas between the panes you will need small filtered vents to keep the windows clear. The inert gas prevents condensation between the panes.

As you assemble the windows you will trap moist air between the panes if you make the window without vents. This moisture will condensate between the panes on a cold day, so you need a small amount of air circulation.

The rule of thumb for these vents is two on bottom round 1/2 the gap under 6 square feet of window and 3 over 6 square feet of window.

That is also how you repair double and triple glaze when it gets old and starts to condensate.



Answer 4 years ago

Having a small compartment in the frame bottom edge for a desiccant with a small hole drilled so it is in contact with the air in between the glass is pretty good. Figuring out a way to make it easily accessible so you don't have to take out the window when you need to replace the desiccant is harder.

You might be able to make something with a small decently sealed hatch that could be eventually covered up by a trim piece so you can't see it but you can take the trim off to access it from the inside (or outside) of your house. If you are planning on doing 3 panes of glass, the desiccant for the second air gap might be a little bit more complicated if you want it also accessible from the same side, but it should be solvable with 2 drill holes to make an L shape to get to the back air gap from the same side as getting to the front air gap.


4 years ago

Doing this is in effect what they call adding a storm window. A storm window is an outside window, often with a screen, that is fitted to an existing window usually covering the entire window and frame. This helps to provide insulation, helps prevent condensation and ice from building up on the inside window and also helps control air infiltration through a window that does not seal very well. Sometimes storms are added to the inside where the window opens outward.

Here are some pictures

There are also heat shrink films that are fitted to the inside of a window frame to create an air barrier and create a storm window effect.

Whether you need to add a vent as the others suggest will depend on your climate. I have some large multipane windows that make up my bay window (which I designed and built myself) and they are completely sealed. I have never had any moisture buildup in them. In terms of efficiency, when its 30 below zero outside the inside panes are clear of frost and condensation.


4 years ago

Yes all you need to do is make sure the air between the glass sheets is confined (sealed in).

The units may not be as efficient as commercial ones but you will get a good result.

In the UK many older houses are fitted with secondary glazing because they can't be fitted with standard DG.

TG will give you more insulation at a greater cost. So it will take longer to recoup the outlay.

Yes, double glazing is the single most effective insulation you can do after insulating the loft and walls.