I finished a job today that exhibited very pronounced negative pressure deflection. Especially the very skinny (about 14 inches wide) insulating glass units were very low on argon. And yes, these were Anderson windows. All of them. Some were worse than others. But all of the IGs demonstrated NPD. If you want to know more about this problem check out my post on defective argon units. Then go to the article referenced and read it.
The method for testing is very simple. Just take your trusty six inch razor, soap up the window with some good sudz, then run the razor vertically straight up. If there is even a slight problem with NPD the razor will miss some of the middle. The more soap left in the middle of the swath the greater the effect and the more problematic the window. Today I observed a virtual 'no contact' in the middle. Just the two tips of the razor made contact! Of course when I turned the razor and ran it across the window horizontally from left to right, it left no soap at all.
So there you have it. It really doesn't need to get any more high tech than this. If you show your customer this and relate the stories of those people who experienced the implosions, you will get attention. Cuz you see. We don't just clean windows. We inspect them too.
Written by Henry Grover Jr
To recieve these posts in your email just type your address in the box to the top right 'Follow By Email".
For product sales henrygroverjr@gmail.com
No comments:
Post a Comment