13/03/2014
المقارنة بين نوافذ الألمنيوم واليو بي في سي
Aluminum Vs uPVC Windows
Aluminum Windows
Aluminum frames are the main alternative to wood and are still popular especially for industrial, residential and commercial uses. Their main selling point is their long life, and that they are easily replaceable. A cracked or broken pane is easy to replace in these frames.
•Noise reduction; Aluminum windows do a better job of noise reduction because of their greater mass. Most noise is stopped by the glass of the window, particularly if the window is double glazed, but the frame can contribute a little to the reduction. Vinyl window frames must be very thick to achieve the same sound insulating results.
•Stronger than vinyl; these windows are preferred in places that experience storms and gales, such as near the coast.
•Corrodes when exposed to airborne chemicals, salts and pollution.
•Slightly lower insulation values, especially in bitterly cold areas.
•Easier to replace broken glass. The frames are screwed together so that it is relatively easy to take out a broken glass pane and reinsert a new one.
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Can be repainted as required. Suitable paints can be found in any hardware store.
Vinyl Windows
Vinyl windows are made in the same way as aluminum windows but with the vinyl extrusion forming a frame around the glass, resulting in better thermal efficiency but higher maintenance.
•Higher resistance to heat or cold transfer. However not suited for hotter regions due to material expansion, warping.
•Only found in light colors due to expansion in hot or cold weather. This means they cannot be painted. They are light colored so they don’t absorb heat, therefore resisting heat stresses and warping.
•Impervious to rust, rot and flaking.
•Less wind load resistance then aluminum, so are not suitable for places that experience gales.
•Need special paints if you do want to paint them.
•Sashes are glued so it is difficult to replace a broken pane.
•May warp and bend over time, especially in areas that experience temperature variations over the year.
•Vinyl frames are made of PVC so are environmentally hazardous.
Cost wise, there is a little difference, with good vinyl windows a bit more expensive; but you will find price differences within both framing options, it often depends on the type of glass used more than the frame material.
http://www.alfaengpro.com/index.php/Resources/aluminum-vs-upvc-windows.html
