[Lionel Hermans]

Just a little update about the issue.
My supplier came to site the do a visual check on what was going on, and a couple of days later a tech representative of Contravision (the manufacturer – contravision.com) came from Netherlands too … What a customer-service! 🙂

Of course my customer was impressed … and here is what they (Contravision) said :
– 200% sure it is NOT a thermal issue
– 200% surr microperforated film doesn’t explode windows
– Black part of perforated film can quickly go up in temp but not enough to explode a window
– Thermal explosion goes from top to bottom (vertically), in my case the window have cracks from left to right (horizontal)
– Problem should be window placement (too much tension)

On the other side of the street (apprix 100m) there was some building construction, and they made some fondations at the time the window cracked. It’s was the cause of the explosion, this caused some micro vibrations and the window didn’t moved enough due to film on it (all was covered).

Hope it helps …

[Lionel Hermans]

Thanks David for that reply!

CONTRAVISION will send his representative to check the windows. They told me they are 200% sure that’s not the vinyl.
To be continued …

Lionel

[Lionel Hermans]

quote Phill Fenton:

Just a thought – but if the vinyl was trimmed to size on the glass, could it be that this left a scribe mark on the surface which may have caused the glass to fail?

yes the vinyl was trimmed but the glass is about 1.5cm thick so … I don’t think a metal cutter cut can do that.

quote David Rogers:

If it’s dark or black then it’ll absorb and transfer the heat regardless of the perforated media

We mesured the temp difference, indeed the dark is about 15 to 20 degrees hotter than the white … but what makes a window explode is the gaz temperature inside the double glazing, not the window temp itself. It can go up 90°.

[Lionel Hermans]

Hi David,

It is indeed dark but that’s why we use perforated film, on top of it is placed on the outside.
What should I use then ?

Thx,
Lionel

[Lionel Hermans]

Thanks for the tips Chris. All went perfectly well!
I made an overlap and slightly cut it to have a perfect finition.

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[Lionel Hermans]

Try with the "Pathfinder" tool in Illustrator. Unite option should made the trick.