Due to my location I am in a situation to choose from only two manufactures.
One can make a 3/8" laminated with 3" air space+ 1/4" laminated or tempered.
And the other can make 1/2" laminated with only .75" air space + 3/8" tempered or laminated. Both are about the same cost and not sure which will be the best for my application.
Goal: Sound isolation from neighbors. Practice (grand piano) room window leading to outside
Construction: Double 5/8" DW with GG/5/8" Densglass + 1/2" OSB. + ISO CLIPS & Hat Channel.
Thanks in advanced.
Window selection
Originally posted at johnlsayers.com, topic 20188.
What application? It's not at all clear from your post what you are trying to do, so it isn't possible to say if either of those options would work at all. I'm also wondering what exactly it is that you asked the manufactures for, since those are rather strange specs. Then there's the issue of why you only want a window without also being concerned about the wall, floor, roof, doors, ventilation, other walls... That said, if all you are looking for is a window system that gives reasonably good isolation down to low frequencies, then I'd go with the one that has the 3" air gap. That will perform much better at low frequencies than the one that only has a 3/4" air gap, without any doubt. And you don't mention what the noise is that the neighbors are making, that is interfering with your piano practice. All you say is that you want "Sound isolation from neighbors", but you don't say what it is they are doing that you need to isolate from. Your construction description doesn't make a lot of sense either: "Construction: Double 5/8" DW with GG/5/8" Densglass + 1/2" OSB. + ISO CLIPS & Hat Channel." That's only ONE side of the studs (assuming I'm understanding it correctly). What is on the other side? Also, is that sandwich of materials approved by the manufacturers of your clips? It seems to be equivalent to about about four layers of 5/8" drywall: are the clips able to carry that safely and still decouple? It would help if you could be more specific, in much greater detail. - Stuart -not sure which will be the best for my application.
sorry for the confusion. This is a recent room addition to the back of my house with only entrance from the inside of main house through a solid door. I am trying to keep the sound in and not disturb my neighbors with my late night practicing. Door leading to house not a major issue. Regarding the window specs. I only was able to find one supplier that could make more than a .75" air space. The one I found that could do more only had 3/8" glass maximum thickness. So it's either go with the one who can go up to 1/2" with .75" air space or the other guy. I do have one other choice, single pane 1.25" bullet resistant. The build is as follows: Structure. Steel Studs 22GA @ 16" Walls 2x3 5/8" R11 batts Ceiling 16" 2x6" R19 batts Floor: Concrete slab 4" Walls: Interior: double drywall with GG and ISO clips Exterior: 1/2" OSB + Densglass 5/8" Ceiling/Roof: Interior : double 5/8" with GG Exterior/roof: double OSB/ asphalt shingle Ventilation: MINI SplitWhat application? It's not at all clear from your post what you are trying to do, so it isn't possible to say if either of those options would work at all. I'm also wondering what exactly it is that you asked the manufactures for, since those are rather strange specs. Then there's the issue of why you only want a window without also being concerned about the wall, floor, roof, doors, ventilation, other walls... That said, if all you are looking for is a window system that gives reasonably good isolation down to low frequencies, then I'd go with the one that has the 3" air gap. That will perform much better at low frequencies than the one that only has a 3/4" air gap, without any doubt. And you don't mention what the noise is that the neighbors are making, that is interfering with your piano practice. All you say is that you want "Sound isolation from neighbors", but you don't say what it is they are doing that you need to isolate from. Your construction description doesn't make a lot of sense either: "Construction: Double 5/8" DW with GG/5/8" Densglass + 1/2" OSB. + ISO CLIPS & Hat Channel." That's only ONE side of the studs (assuming I'm understanding it correctly). What is on the other side? Also, is that sandwich of materials approved by the manufacturers of your clips? It seems to be equivalent to about about four layers of 5/8" drywall: are the clips able to carry that safely and still decouple? It would help if you could be more specific, in much greater detail. - Stuart -not sure which will be the best for my application.