Hey,
I have read the double window installation thread under the sticky reference area. I am missing one thing, the thickness of the glass.
Should I go for two thick glasses , in that case how thick ? I just a got a quote and I must spend about $300 for a 15mm glass of about 700mm X 560mm. Or can I go for 2 double glazing ?
Another question:
What are the black and gray areas in that drawing ?
If you're building double-framed walls as that drawing, glass thickness should be 1/3 as much as the total gypsum thickness for each side, with one side being slightly thicker if possible (different coincidence frequency)
Sorry, black is 60 duro neoprene or equivalent, gray is closed cell foam (around 15 duro if it's specified) - the black is to keep the glass located and supported, the gray is to SEAL. GM's trunk seal rubber (boot seal if you're English :wink: ) works well for this; if you don't have Rod's book, it's available at JC Whitney (auto parts online) Steve
BTW, do NOT use two double-pane windows; you want single, heavy panes as far apart as practical. Best is laminated, otherwise known as "safety", or "bullet-proof" - second best is Tempered, but you MUST order it in the size you need, and even NICKING it during installation can cause it to break into little pieces. Last is "float" which is ordinary window glass. These are given in order of both safety AND acoustics, which (for once) coincide with each other...
knightfly wrote:
If you're building double-framed walls as that drawing, glass thickness should be 1/3 as much as the total gypsum thickness for each side, with one side being slightly thicker if possible (different coincidence frequency)
My wall is made of hollow concrete blocks. I have added 7 cm of gypsum on each side to reinforce the mass in the mass-air-mass system of the hollow blocks.
I have a wooden frame right now that is fixed to the concrete wall, the gypsum comes against it.
Here comes two shots from both side of the wall to give you an idea:
I was thinking of a one leaf glass of 1cm on one side and 1.5cm on the other, is that too much ? not enough ?
Thanks
alex
You really put 70mm of gypsum on each side??!? WOW... is that a typo? That's nearly 3 inches of gypsum on each side of the blocks, or about the length of a typical index finger.
The glass you suggested wouldn't be excessive for such a wall, in fact you might want a bit thicker if you can get REALLY good seals/doors; if not, that will keep up with the rest of your construction.
70mm?? REally? Steve
knightfly wrote:
You really put 70mm of gypsum on each side??!? WOW... is that a typo? That's nearly 3 inches of gypsum on each side of the blocks, or about the length of a typical index finger.
The glass you suggested wouldn't be excessive for such a wall, in fact you might want a bit thicker if you can get REALLY good seals/doors; if not, that will keep up with the rest of your construction.
70mm?? REally? Steve
Yes !! what ???
Originally I had hollow concrete blocks, I wanted to create a second leaf leaving some air+insulation in between but since the mass-air-mass system exists already in an hollow block, all I could do -besides trying to fill somehow the air inside the blocks- was to add to the mass, thus on each side of the wall. Yes I did put 70 mm of gypsum on each side and are preparing 2 X 60 mm thick doors.
Are you surprised because it is good or worthless ? I am condused by your response :S
70mm is like 10 sheets of standard gypsum :shock:
thaz a lot dude!
(got photo's to back that up?)
you have them upthere !
The gypsum comes as blocks that you embed one into the other, haven't you got that in the US ?
I've got a couple walls that have 4 layers of 3/4" OSB and two layers of 1/2" drywall. :) That's thick.
Is that tongue-and-groove? I've never seen any product like that here... :roll:
sharward wrote:
Is that tongue-and-groove? I've never seen any product like that here... :roll:
really ? I am glad to have brought something new then !
:)
There are 4 inch blocks also and they weight 70 pounds each covering half a square metter.
knightfly wrote:
black is 60 duro neoprene or equivalent
I am sorry I have been searching about that, but what equivalent do I have here in Europe ?
aaah, looks like fermacell or alike!
That's not solid gypsum. It's a combo of (for example) gypsum/wool/gypsum. Not very much mass... looks like you just wasted some money imo :roll:
Neoprene is a man-made rubber, but has better resistance to oil and such; so don't oil your windows :wink:
The thick gypsum is good, I was just shocked at the thickness. Most people are doing their best to save money to the point of being unhappy with the isolation afterward :cry: However, if those interlocking blocks are, as Ro suspects, NOT solid, it may be a multi-leaf thing all over again; can you verify one way or the other that they are gypsum all the way thru? I can't quite tell by the weight, although it seems nearly heavy enough for the size you quoted... Steve
did a little digging.. it's not fermacell. It's what we call "gasbetonblok" in the Netherlands, dunno the English term :oops:
It's something like a lightweight stone, open(cell) concrete blocks. Easy to work with, you can cut it with just a handsaw. lightweight stuff.
It's not 2 leafs, but it's not very heavy either.
It's a concrete type who is characterised by its light weight. The strenght of this light concrete is thus less than an ordinary concrete. The cause of the light weight is the large quantity bubble Len (warrants) in concrete. This bubble Len arises because during the production process a small quantity aluminium powder is added. The remaining material make be which necessary is warrant concrete, just like in an ordinary concrete, cement, lime, sandsand sand and water.
Ro wrote:
did a little digging.. it's not fermacell. It's what we call "gasbetonblok" in the Netherlands, dunno the English term :oops:
It's something like a lightweight stone, open(cell) concrete blocks. Easy to work with, you can cut it with just a handsaw. lightweight stuff.
It's not 2 leafs, but it's not very heavy either.
No don't confuse, cellular concrete blocks(that is what you are talking about) with pure plain gypsum (that the only component of this material). It is exactly like the gypsum in wallboard but compressed and compact. Its is quite heavy really one block of 70mm (0.5m*0.6m) is about 15kg 33pounds.
Steve, it is plain but you have some with wholes inside to pass electricity or other stuffs through. Each block is quite heavy, you can however cut it with a hand saw like wood.
Here is a good doc, with diverse variety:
http://www.batissor.com/LaFarge/Platres/PRODUCT/dp_sy_MemCrx_11_GammeProduits_8.pdfDon't read a word of french, but I hope yours are the solid ones; if so, you should be in good shape with your walls.
Have you decided how you're gonna do your roof/ceiling yet? Inside or outside, and what? Steve
knightfly wrote:
Don't read a word of french, but I hope yours are the solid ones; if so, you should be in good shape with your walls.
Have you decided how you're gonna do your roof/ceiling yet? Inside or outside, and what? Steve
Thanks for asking Steve - you are keeping an eye on me right ?
I have decided to do a second leaf inside as the weather could easily deteriorate what I could do outside.
I can only come down of 18 cm so
- I will leave 20mm of air and 45mm of hard rockwhool
- I will put 26 mm of gypsum in 2 layers of wallboard of 13mm
with this, I will have about 90 mm left for a cloud.
What do you think ?
Sounds like about the best you can get with your situation... Steve