Double pane windows

[Tinitman]

I remember a few years ago I got a chance to listen to a solar screen sales guy. He started telling the potential customer that if you have window film installed, you will find glass all over the room. I almost wet myself laughing so hard. I also left the client with a signed contract. That customer was so happy we ended up doing most of the homes on that block.

If you look at it on a possitive note, we must be doing something right because the competing industries are having to go through drastic measures to sell their wares.

[EWF]

If you talk to anyone who is seriously into the flat glass market, their percentage of glass breakage is less than 2%

Hi Tintman,

Agreed. In fact, I think it's probably closer to 0.02% than 2.0%.

Let's not forget that blinds and curtains can also add to the solar heat load. At least our industry publishes data. Ask a blind or a curtain guy to quantify how much the head load on the glazing will change if you go with Curtain A, B, C or Vertical A, B, C.

-Howard

[vquestfilms.com]

You do have a valid concern however, which is why our industry publishes guidelines for such applications.

Generally speaking, here are the constraints:

• Films with a Total Solar Energy Absorbed (TSEa) of 54 or less (<=54) are considered dual pane compatible
  

-Howard

Howard,

Who validated this specific recommendation? Someone from our industry? And is it a guideline for thermal breakage or seal failure?

-Rob

[EWF]

Who validated this specific recommendation? Someone from our industry? And is it a guideline for thermal breakage or seal failure?

-Rob

Hi Rob,

Reference:

AIMCAL Window Film Committee

Recommendations For Avoiding Glass Failure

Page #2

Last paragraph

It is primarily a guide for avoiding thermal breakage. While film is often blamed for seal failure, there is little objective data to support that. (see page 3 paragraph #2).

Anyone who needs a copy of this can contact me.

-Howard

[vquestfilms.com]

Who validated this specific recommendation? Someone from our industry? And is it a guideline for thermal breakage or seal failure?

-Rob

Hi Rob,

Reference:

AIMCAL Window Film Committee

Recommendations For Avoiding Glass Failure

Page #2

Last paragraph

It is primarily a guide for avoiding thermal breakage. While film is often blamed for seal failure, there is little objective data to support that. (see page 3 paragraph #2).

Anyone who needs a copy of this can contact me.

-Howard

Thanks Howard. I will have to dig up my copy and check it out. I have the IWFA 1998 pamplet on "The Use of Window Films on IGU's" good info there on seal failure.