There's typically some space on the bottom of windows between the window frame and your exterior walls. This space is called the throat of the window and it's definitely there for a reason. It serves to keep rainwater from entering your house, and if you've ever dealt with a water issue in your home, you know that prevention is by far the best way to avoid moisture issues. You need to keep obstructions from forming in the throat of the window and check the area on a regular basis. Fortunately, it's a very simple process.
To clear out the spaces between your window frames and your exterior walls, get a thin metal or wooden pole and gently move obstructions. You'll likely have some built up dirt and grime and maybe a few leaves, but in most cases, clearing out the throats of your window frames will only take a few seconds.
It's a good idea to clear your windows every few weeks and more often during rainy seasons. If you never clean your window throats, you may end up with wet spots on your interior walls. This can be a major headache, as cleaning out the water damage will undoubtedly end up costing some serious money. Fortunately, with a little bit of regular maintenance, you can keep your walls clean and water-free.
Moisture can lead to wraping and twisting of timber.Maintanace may be required (depending on hardwood/softwood)compared to PVC and metal frames
Window frames are usually made of aluminum.
You can purchase wood window frames online with ease. All you have to do is type wood window frames online and find the website that suits the customer.
They are made of compounds not elements unless they are Iron or Aluminum window frames. Most window frames were made of wood but UPVC is becoming more popular.
Window frames used to be made from steel but aluminium is lighter and does not rust.
Window frames for homes should not be made of steel because of the danger of lightning strikes. This is one of the reasons why window frames are made of either wood or aluminum. Steel also has the potential to rust if not treated properly.
See the related link below which covers the construction of window frames including some interesting cross sections of wooden window frames including provision for pulleys and sash weights and views showing frames for brick, stone and wooden or frame walls.
window manager
because it can hole on longer
because it does not rust
a guy from Zimbabwe who had no window frames invented it.
The web page http://www.inquirewithin.biz/windows/windows.htm covers the construction of window frames including some interesting cross sections of wooden window frames. The various parts of a wooden window fgrame are illustrated and named.