wood is thermal insulated material, wood window can save a lot of power.
and wood is more stable after kiln drying and machining processing.
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.
Softwood is alot cheaper as it is faster to grow than hardwood.
Wood, treated and plastic (PVC) coated wood, aluminium and aluminium alloys, polyvinylchloride.
because it does not rust
can be used for hosue and the frames of house.
Wood is an insulator. The cold/heat of the exterior will not go through it to the inside of the house.
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Window frames are usually made of aluminum.
doors, window frames, furniture. source: Wikipedia.org