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Impact-Resistant Windows and PGT Factory Tour

Bob is at PGT Industries in Venice, Florida, for a visit with Dave Olmstead, the code compliance officer for PGT Industries, makers of impact resistant windows. Olmstead explains how windows are a fundamental element in storm-ready buildings because they keep the envelope closed to damaging wind entry. If wind enters a home during a high wind event, it increases the pressure inside like air in a balloon. The air has to find a way out and typically pops off the roof, causing catastropic building failure. Olmstead then shows Bob the impact resistance test that is performed on windows to determine the level of protection they offer and whether they perform up to code. The first window is made of regular annealed glass. It is not tempered, heated, or coated in any way. The second window is made of tempered safety glass. The third is of impact-resistant, laminated glass. Olmstead runs the cannon test, where a two by four is fired from a pneumatic cannon at 50 feet per second or 34 miles per hour, simulating the force of 110 mile per hour winds. The annealed glass breaks and falls from the frame. The tempered glass shatters within the frame but leaves a hole where the board entered, allowing wind to penetrate the structure. The laminated glass shatters but is held in place. It does not perforate so the home is protected from wind entry. Impact-resistant window glass is safety laminated on site at PGT. They cut glass to the appropriate size, cutting two panes, then cut buticite to fit between them. The glass sandwich is then baked with the laminate between in a heat and pressure oven for four hours. Once it is cooled, it is ready to be assembled into a window.
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Impact-Resistant Windows and PGT Factory Tour

  computer-generated transcript - may not be 100% accurate

" It's all right to we're here inside the factory at CDC and Dave Olmstead is code compliance officer that means you really have to. Make sure the product is complying with building code requirements right -- Why is it too important to have the best kind of windows and laughing and possibly. When your house is confronted with a hurricane."

" Well here in Florida we get a lot of sure but the reason. Windows that protect field. House is really shoo him -- sales and hurricane right. What happens the wind gets into the building very suddenly it tries to blow the building up flexible -- right decisions imagine. Right that can cause catastrophic failure of the building -- off just falls walls to fail."

" On the water and David that balloon analogies are very good way. And most people have to go through a great deal of difficulty putting up plywood or shutters or battening down the hatches when a storm is coming and as we know last year. The stakes were putting my say now. All through the season now here Ed PDT you're manufacturing the type windows that are in. Impact resistance unless. Talk about the different kinds of windows that have traditionally been used. -- this is what kind of glue. Wow this is."

" Your regular sealed glass walls. This is the most common glass used in windows all over the country when you say and the -- it means the glass is heat treated. No it has been treated or strengthened in any way he hasn't been ordinary glass all right and then what's this over here we have tempered glass. Tempered glass is very commonly referred to safety."

" OK Paul what is tempered is much stronger about four times stronger than. Listen and buy -- it's what's required to be you know sliding patio doors dressed man has -- OK and then this of which called Winguard impact resistant glass yes there. And a brick wall. Very much -- all right you can tell by half also good job of keeping noise out absolutely. Now testing environment involves firing a two by four at it right -- we're gonna do that right now."

" So now you're gonna demonstrate how a two by four flies through the air in a big storm. Can impact this machine I mean this -- tell me about the machine you've got rigged up here this is. What we call our cannon yeah itself pneumatic cannon -- actually fires still viable when all right OK fires and to. Two by four. Exactly fifty feet per second. That's about 34 miles an -- so that simulates actual conditions in in. That's a simulation assimilation. What that two --"

" Wow."

" OK I was doing."

" Our old fashioned brass this is still so much perennial glass that's his regular lab right. Okay all right so we've repositioned now and the next victim is tempered glass right now how does how did they make tempered glass tempered glass is actually glass that's heated about 1400 degrees and then cooled under special conditions. OK makes the glass about four times stronger than. The same as the glass we can use in the kitchen -- bowls and stuff that are tempered firings. Right okay all right well let's fire it."

" Definitely a difference -- no shattering just kind of a circular hole there yeah. This question is for safety goals that we. For example -- small but still that's big enough hole that your balloon theory could be put. To work right away in terms of the air rushing into a house also. And potentially changing the pressure so that it could blow the roof off. Right OK all right so next let's set up to see how we do with a Winguard right OK OK all right now for the third victim this is the Lamine. That's right it's OK fire."

" Impressive yes the world pretty impressed. And again what. We're looking for is. No hole exactly the wind connected through."

" Boy that's scary though. That's in the house has that happened serious. -- the whole business of safety laminated glass laminated glass do you do that here at the factory."

" We bring glass in several places most of it comes from Pennsylvania it do you start with regular and -- plaster we did you do. Now we go through a process of cutting glass to be appropriate size every campaign to be last right and we have to put. Called here decided all. Over the chemical name for the department from doing. It's basically like a layer of food wrap almost right perfectly clear yes well lull before it's laminated is very quality they have things. -- It's 90000 dominance of the shortening -- and that. OK now we have to cut the pieces of glass smashed cut this inner layer -- called polyvinyl who are off yeah. To match the glass. Do better in the waiting room looked like an operating -- any contamination. From there it goes through a pressing roller. And -- to a lot of plain words actually -- and breakfast hot to -- just above 450 degrees and cut under pressure from Bob wore out okay then when it comes. We ought to play that cools it's ready to be put in a way of we -- laminated here for ball control purposes. Now what about this whole business of low. I know -- he does that involve spraying something on that's actually done at the glass manufacturer themselves okay it's a metal coating they put on the in the glass that makes it heat reflective. Put your Moly coating on the wall. Side of the glass that's closest to your -- still. Here in Florida because we worry about solar heat gain we want to as opposed to the outside and when don't we yeah that makes them. Australia that's very impressive bit yesterday. Actual testing these products actually have to be about that like this we don't."

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