Does an IGU with a laminated lite have 4 surfaces or 6? Simple question that can make for a really interesting discussion between lamination folks and IG folks.....
Greg, this is Very interesting. Indeed it can. The argument can be made a bunch of different ways for it. On the one side and at a fabrication level, it needs to have 6 so that in case there is any treatments on to the laminated glass like a frit pattern or so we know what surface its on. But, to a glazing contractor in the field, that no longer matters and having less surfaces might be easier to understand. So is the right answer that it has 6 until it is build and then is reduced to four? Much to ponder about, thank you for the comment.
@@LearnGlazing Great reply! Thanks and I thought that you would enjoy the question. In the residential world we also usually looked at it as lami has 4 during fabrication and 2 once installed in an IG. Another possibility might be if the lami had a LowE coating inside the laminate sandwich. Since it's critical to make sure that the coating is installed in the window opening correctly, whether in an IGU or on it's own (still happens in some places), knowing which interior surface had the coating is vital and in that case, once again the lami has 4 referenced surfaces. As you well know, sometimes something that seems so simple, isn't.
@@LearnGlazing Not sure how much this affects commercial installs, but in the residential world I would tend to lean more toward describing a laminated over mono IGU as having 4 surfaces rather than 6 once it's installed in a window frame if for no other reason than to hopefully avoid potential confusion when describing performance differences between a lami "triple pane" and a more conventional triple pane, at least on paper.
Does an IGU with a laminated lite have 4 surfaces or 6? Simple question that can make for a really interesting discussion between lamination folks and IG folks.....
Greg, this is Very interesting.
Indeed it can. The argument can be made a bunch of different ways for it. On the one side and at a fabrication level, it needs to have 6 so that in case there is any treatments on to the laminated glass like a frit pattern or so we know what surface its on. But, to a glazing contractor in the field, that no longer matters and having less surfaces might be easier to understand. So is the right answer that it has 6 until it is build and then is reduced to four?
Much to ponder about, thank you for the comment.
@@LearnGlazing Great reply! Thanks and I thought that you would enjoy the question.
In the residential world we also usually looked at it as lami has 4 during fabrication and 2 once installed in an IG. Another possibility might be if the lami had a LowE coating inside the laminate sandwich. Since it's critical to make sure that the coating is installed in the window opening correctly, whether in an IGU or on it's own (still happens in some places), knowing which interior surface had the coating is vital and in that case, once again the lami has 4 referenced surfaces.
As you well know, sometimes something that seems so simple, isn't.
@@gregcorwin8316 I think the short answer would be to just keep it at 6. Since simplifying could only lead to trouble.
@@LearnGlazing Not sure how much this affects commercial installs, but in the residential world I would tend to lean more toward describing a laminated over mono IGU as having 4 surfaces rather than 6 once it's installed in a window frame if for no other reason than to hopefully avoid potential confusion when describing performance differences between a lami "triple pane" and a more conventional triple pane, at least on paper.