Laminated glass consists of two layers "glued" together by an acrylic layer (PVB).
The purpose of using laminated glass is primarily for safety reasons. In the event of an impact the glass shatters, but is held in place, without breaking and exposing shards. Car windscreens are made of laminated glass.
The PVB interlayer blocks 99% of the Ultraviolet rays, the same amount good quality window films do. "Sound Stop" glass, containing a thicker interlayer is an exception to this rule, as a different compound is used; one which does not block the UV.
Sometimes we encounter problems with laminated glass, if the edges are cut rough or have cracks and chips. Usually invisible once glazed, the glass can be in place for years and when window film is applied, it suddenly cracks within a short time.
We are always very careful when recommending a window film with high heat absorbing properties. When the film heats the glass unevenly, caused by partial shading for example, the inner layer of the glass expands at a different rate to the outside layer, causing heat stress and then cracks. In some cases we recommend exterior film to minimise the risk. Johnson Window Films have now released a range of external window films other than the traditional reflective silver.
Always deal with an experienced window tinter who can identify different glass types and help to avoid potential disasters by recommending the correct film types. Where possible, deal with a member of Master Tinters in New Zealand.
Here is another myth exposed: Blocking the UV alone will not stop fading! Unless you reduce the direct heat and lessen the light, your fade protection is never good enough.
For your window tinting needs in Hamilton and the Waikato, call 0800 846 892
The purpose of using laminated glass is primarily for safety reasons. In the event of an impact the glass shatters, but is held in place, without breaking and exposing shards. Car windscreens are made of laminated glass.
The PVB interlayer blocks 99% of the Ultraviolet rays, the same amount good quality window films do. "Sound Stop" glass, containing a thicker interlayer is an exception to this rule, as a different compound is used; one which does not block the UV.
Sometimes we encounter problems with laminated glass, if the edges are cut rough or have cracks and chips. Usually invisible once glazed, the glass can be in place for years and when window film is applied, it suddenly cracks within a short time.
We are always very careful when recommending a window film with high heat absorbing properties. When the film heats the glass unevenly, caused by partial shading for example, the inner layer of the glass expands at a different rate to the outside layer, causing heat stress and then cracks. In some cases we recommend exterior film to minimise the risk. Johnson Window Films have now released a range of external window films other than the traditional reflective silver.
Here is another myth exposed: Blocking the UV alone will not stop fading! Unless you reduce the direct heat and lessen the light, your fade protection is never good enough.
Proud Members of Master Tinters NZ
1 comment:
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