they worked sat… that makes 6 days on the job… and they aren’t done with the downstairs yet…. my sales guy came by who happens to be a friend as are most at this company (large national co. so i’m not worried about their profits) anyway he says… ‘wow we won’t make any money on this job” to which i said… “i was wondering seems like a ton of material….. ” he say no we are fine on the material… the labor will eat our lunch…
seems they can usually do a 2500sf house in a day… IF it’s 2×4 studs…. all mine is 2×6… seems this stuff just places much faster in 2×4 walls than 2×6 walls and it’s not just the time to fill the extra space seems the added materials weight in the thicker walls compacts it more and is much slower going in… where they all but never have a stud bay fall out of a 2×4 wall it’s common in a 2×6 wall (we’ve only had one)
so where you’d think 50% more material in a 2×6 over a 2×4… it’s really about 75% more… because of the way it compacts under it’s own weight…
they haven’t got to the 18ft walls yet…. should be fun… i see 2 more weeks of blown’n should be interesting…
real drawback is the dust has all but stopped anyone else from doing anything while they are there
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Replies
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How much more is wet blown over just dry blown costing? Quit a bit? Just curious
Doug
I don't know... this is very dense... we hung one side of all the walls... this is all common walls between units and in this case it's to control sound between units... this couldn't be done dry... except in batts... and they have little or no sound control
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Do you know if the wet blown has more insulation value then ordinary dry blown? I know that's not what your trying to accomplish but again, just curious.
Doug
i believe it does have a higher r-factor... because i think there is more there if dense gets you anything...... never a fan of fiberglass batts i always saw the fact that they never really sealed anyhting... they just slowed the transfer of heat sorta kinda... i'm not sure a well sealed air space wouldn't be better .... I think any time you can seal a stud bay you are doing good... and this stuff seals almost as well as a full stub bay of foam... plus with the borax and fire retardants they add it has to be better than foam on that front... (as a side note) i use to put borax in stud bays before the drywall in about everything commercial i did (really did on pawn shops and commercial kitchens and bars...) and nevr had a roach problem... some i know are still bug free 15yrs later cause i still own the buildings...
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Why couldn't it be blow dry?I don't see why inside walls are different from external.You have something solid on one side, sheathing or DW. They put up mesh and blow through holes in the mesh.
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A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
well... there is no mesh.... imho mesh pretty much sucks... and if you have ever had to drywall over mesh filled stud bays pushing against the board with popping screw holes... you'd shoot te next guy who tried to use it... i've seen drywall crews walk away from mesh jobs after a few boards...
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That is much different than sayin that it could not be done.Mike Smith does it and does not seem to have problems with DW.But he is not doing 18 ft walls either.I would like to see a comparison of some one that has done both, and more than once, and make a comparison.I am guessing that is more of a regional thing about which is done..
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A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
Bill and ponytl,
I just did all the walls in this room with cells and mesh, and hung the rock myself. Not a big deal to hang the rock. You just have to push the bays in with your hands just before you hang the sheets, then they go on fine. Wear gloves or you get rug burns pretty quick. Might want to go a little heavier with the screws though. Getting the mesh good and taught helps too.
Steve
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i use to think... (well not really) that it took far more time to glue & fit the mesh and then blow than it did to do the wet... but now i'm wondering... i don't think hang'n 12ft 5/8 board on 18ft walls would be fun no matter how you did it... but have'n to push on it...
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The other thing I've done (on an 18 foot high wall by the way), is run resilient channel perpendicular to the studs on top of the mesh before blowing. But I didn't do the rock on that one. The sheetrock guy pizzed and moaned about the resilient though...I think that just what they like to do...pizz and moan about bad prep.Ceilings are a pain with cells in them. Strapping them after the mesh makes them a lot easier, and makes it almost a Mooney ceiling to boot.Steve
Edited 6/2/2008 11:37 pm by mmoogie
Strapping them after the mesh makes them a lot easier, and makes it almost a Mooney ceiling to boot.
That's how I had in my mind to do both ceiling and walls. I wonder how much the air channels created behind/above the SR would effect performance?http://grantlogan.net/
But you all knew that. I detailed it extensively in my blog.
>>I wonder how much the air channels created behind/above the SR would effect performance?<<I can't imagine it would matter one iota. The air-sealing happens from the density of the cells, so any air in the space between the SR and the cells would just be stagnant. And there wouldn't be enough of a delta T in that space to create any convection currents to speak of.Steve
Kinda what I figured. The concept of the mesh bulging bothers me a little as well.CustomMetalWork
But you all knew that. I detailed it extensively in my blog.
Has anyone tried used method? They claim you don't get pillowing with this installation method. Pillowing is their term for the bludge you have been talking about pushing with insulweb.
http://parpac.com/index.html
since there was no way to dry blow mine i didn't price it... but i have 600 running of 18ft 2x6 walls upstairs and some 800 running ft of 12ft walls down... plus some 160ft of 15ft walls... all 2x6... and i'm under 10k for the whole deal...
i didn't ask for that price they bid it... i accepted i don't know if it's high or low... I only got one bid on wet blown cells
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Thanks P
Doug
That seems insanely cheap to me.
might not want to put all ur 401k money into this company...
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'they haven't got to the 18ft walls yet.... should be fun... i see 2 more weeks of blown'n should be interesting...'
Don't those 18' walls have fire blocking? That should help with slumping.
all the walls have fire blocks... the code here is 10ft on the blocks... which means the lower walls are blocked at about 6ft... the upper walls are at 9-10ft... today they did get upstairs... the progess wasn't pretty... they had 3 guys and they didn't get 20 bays blown to the fireblock... saw 4 that fell out... before today i only saw one that fell out...
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