Nov 30, 2009, 8:53 PM
Post #4 of 9
Re: [Linda in Morelia] Dual Pane wood windows
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I've been in the glass fabrication/distribution biz for 3 decades (way too long).....here are some of my thoughts on this inquiry.
I am not aware of any IG (insulated glass) fabricator in MX. You might find a "progressive" glazier in Morelia that has a device known as a super-spacer sealing gun (but I doubt if that would be available). Your architect or builder should know if IG units can be obtained in MX. Maybe there's an IG fab in DF?? Ask around or just Google.......
If the sizes were small, you mentioned colonial style, which is generally 8" x 10" (or smaller) - perhaps you could bring these in from the states. IG can be boxed, crated, shipped, it's done all the time - probably not cheap. If you did buy tempered IG small lites in the States you could pack those in a suitcase with some foam spacers, and toss in the belly of an aircraft. Don't worry about the tempered glass breaking as long as you protect the edges of the glass (the tempering changes the molecular structure to handle 30X the impact strength of normal glass) however the immediate edge is vulnerable. Weight is approx 5lbs SF. I play around with fusible art glass (baked in a kiln) and have brought bundles to MX this way, inside a suitcase. Not a problem.
If sound mitigation is your goal, several options to consider. Using different thickness of substrates - example one piece of glass is 1/8" and the other is 3/16", this very minor change will improve the STC 'sound transmission class'. The different thickness will disrupt the sound wave (sound transmission). Might sound odd - but it really works!....and costs almost nothing. The best option for the glass type addressing sound is, laminated glass (aka safety glass), like the windshield of your car. Lami glass consists of two sheets of glass compressed together under heat and pressure and the inter-layer .030 PIB acts to interrupt the sound wave. It is also beneficial for impact resistance (break-ins) assuming the frame it is installed in is secure. The reason lami is used in ONLY the windshield of a vehicle is to contain occupants from launching. Lami glass is the code requirement for ALL glazing, residential and commercial in hurricane zones in the SE. This eliminates "flying" glass shards when all hell breaks loose. I have purchased lami glass in Ajijic - should be available in Morelia too.
Don't know if you are familiar with the methods used by Andersen Wood windows, 30 - 40 years ago...... this was at the infancy of 'sealed' IG units. These windows would have one fixed piece of glass glazed in the wood frame, and the other panel was removable (called a sull sash) for cleaning - clips in and out - easy to remove. Later as the technology developed, the two pieces were sealed together in an IG unit. You could try this, and a skilled carpenter could figure this out.
Plastic infill, in lieu of glass, would provide a better STC, but then plastic scratches and the surface is an attractant for dust as it's surface generally has a static charge - "dirt magnet". But if this is a window behind a transparent drape and you just want ambient light - I would use plastic and every couple of months wipe it down with mild soap and water.
Moisture inside an unsealed "home-made" dual pane unit is a result of humidity and temperatures. BIG problem in the cold environs of the Midwest (outside is below 0ºF and inside is 68ºF and 35% humidity level) where condensation is intense + creates mold etc. In Morelia you might get some "minor" condensation (sweating) in the rainy season - my guess is the winter months would not be an issue for moisture - at all. Option to remove the sull sash (second layer of glass) in the rainy season, if you did not want to keep it clean.
Hope this helps and good luck.
"NOT ALL WHO WANDER ARE LOST...."