So I asked at the curtain shop how much it would be for pelmets, and they quoted me something outrageous (I can't recall now what) and times that by however many windows I have it was incredibly outrageous. As I'm a miser with a cordless driver, i thought about it for a bit and decided to make my own.
After a little working out, with a few mistakes here and there, for about $40 a pelmet (mine are a little over 2m long) my house is toasty warm for the coming winter and I'm a happy little vegemite.
It's quite easy even if you don't have your own workshop. I went to Bunnings and asked them to cut the timber to my precise measurements (and they did, give or take one or three mm - if i'm fussy i get them to cut to the lengths that fit in my car and cut to precision at home) and the smaller pieces i needed i cut myself. You'll need a drill and a screwdriver, some 6g wood screws, some cup hooks, and (for masonry walls) some dynabolts and a hammer drill. And some filler, paint, some curtain rods.
As an added bonus you can also use the top of the pelmet as a bookshelf if you need some extra shelving.
So in a day you can have pelmets (and curtains) as easy as pie. Not as tasty tho...
And to be completely scientific, you can check the temperature of your room before pelmets, to compare to the after pelmet improvement.
If like me you want to know why it works, google 'how pelmets work' or go to: www.perthhomeinspector.com.au/pelmets-for-efficiency.html
So it seems pelmets don't just help you keep warm air in during winter, but helps keep your cool air in when the heat outside increases as well.
p.s if you like this 'ible, please rate me, i like the feedback :)
Step 1: Measure the windows
Add however much you need to the side of the windows so your curtains can sit to the side and not block the window. That'll depend on how much curtain you need - wider windows = more curtains; thicker curtains = wider pelmets.
I wanted thick material to insulate against the cold, so I wanted to add at least 120mm - 100 mm for the curtains and 18 mm thickness of the end of the pelmet.
I used 138 x 18 mm pre primed pine board, about $7 a linear metre.