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Aluminium is a very useful metal. It is light, strong, easy to form and machine, low cost and, by anodising the surface, can be made corrosion resistant and is very plentiful. Aluminium is the third most abundant element in the Earth's crust after oxygen and silica.
It is made by smelting bauxite at very high temperatures in electrically powered smelters which use very large amounts of power.
Aliminium is replacing other materials for all sorts of uses particularly in the building industry. Aluminium has certainly revolutionised aircraft. At the start of the second world war we had biplanes made from plywood, canvas and string but by the end of the war, a mere five years later we had monoplanes made from aluminium.
Advantages of Aluminium
It also conducts heat and electricity very well and so it is being increasingly used to replace copper for pipes and electrical wiring though while it is not as effective as copper, it is far, far cheaper.
On top of all this aluminium is cheap, it is after all the most common element on our planet after oxygen and silicon. It does have a couple of downsides in that it is soft so paint doesn’t stick to it very well and, owing to its high melting point (2,000 degrees C), smelting it takes a lot of electrical energy.
Anodised surface treatment for strength and colour
A Wide Range of Extruded Sections
Window and Door Frames
Things to watch for when using Aluminium for Windows and doors.
It is important to make sure that they are assembled correctly.
With unusual shapes and no written instructions you may find that the people assembling your windows and doors don’t know how they are meant to go together. I recently came across dozens of doors made for a large project that had been assembled by 3 different crews, they had all used different methods but in fact none were assembled correctly.
Another thing to watch for is that they are waterproof. A case of severe water damage to a wall on a building in Serangan was traced back to rain beating against an exposed wall getting into aluminium window frames through the corner joints and from there into the structure of the batako wall. It all goes down to the design of the frames and the method and accuracy of manufacture. Silicone may be used to seal up the window frames but it doesn’t stick very well. Sikaflex is much better.
Well designed window frames are self draining, they collect water that penetrates and allow it to drain out in a controlled manner.
Aluminium Windows and Doors - A Checklist
1. Properly constructed, this is particularly important if the door has louvres or “plank” panels.
2. Good fit of window and door frames into the walls and with effective corrosion resistant screws.
3. Effective hinges that won’t rust.
4. Good fit of the window into its frame with effective rubber seals.
5. Accurate corner joints.
6. Effective way of replacing broken glass.
7. Doors and windows should not catch their frames.
8. Doors should not catch the floor.
9. Locks and catches all working correctly (lever catches are better than the lift up ones).
10. Inspect for dents and scratches and ask the installer to replace poor quality work.
It is a very good idea to find a reputable specialist contractor who guarantees his work (did I say guarantee? Some people do provide them you know).
For me personally aluminium is a very poor substitute for the aesthetic beauty if natural wood but the trees are rapidly running out, to say nothing of the loss of our natural environment, and so aluminium presents a very viable and useful option.
Source: Free Articles from ArticlesFactory.com
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