Minimum Ceiling Height in a Wee Basement

Davy Crow · Post by **Davy Crow** » Thu Feb 03, 2005 10:13 pm

hahaha, good one.....

in any case WE ARE THE PEOPLE* cos we invented everything, like copper wire....invented by two scotsmen fighting over a penny!!

*meant literally, not in the popular glasgow context!

Davy Crow · Post by **Davy Crow** » Sat Jun 04, 2005 11:22 pm

been a while but were now started and hopefully soon i can post some photos.

i have a question in my mind that i cannot come up with an answer to...

were building a 2 leaf wall construction all round and i understand that you should never have a hole going all the way through the 2 sheets of gyproc on the outsides of the 2 seperate leafs. i cant work out how, then, the wiring going between rooms can be installed without it going right through the partition. is it just a case of caulking up the hole that the multi core etc will make or what?

any ideas much appreciated...

also, knightfly, can you pm me with a figure of what people usually would donate. i'm keen on making a donation as i have learned shedloads from this site and would not have been able to effectively build (hopefully im not being too presumptuous) our place without your time and i wouldnt want that scottish thrift urban myth issue being raised again

.

Post by **sharward** » Sun Jun 05, 2005 3:20 am

Davy Crow wrote:. . .and i understand that you should never have a hole going all the way through the 2 sheets of gyproc on the outsides of the 2 seperate leafs. i cant work out how, then, the wiring going between rooms can be installed without it going right through the partition. is it just a case of caulking up the hole that the multi core etc will make or what?

Perhaps you are referring to the "sin" of having an electrical box on the inner leaf wall directly opposite (or in close proximity) as an electrical box on the outer leaf wall. That should be avoided -- move the location of one of the boxes one cavity over so that they're not "back to back."

Or perhaps you are referring to the "sin" of having any holes in any leaves. Obviously if this were taken literally, you would have no electricity in a sealed box with no air circulation (and, taken to the extreme, no door for escape

). Obviously there needs to be exceptions to that rule. So, yes, a liberal amount of acoustic caulk to seal up the hole is in order.

Use of putty packs is also highly reccommended.

If you don't care about aesthetics, you could surface mount your conduits and boxes to minimize the number of penetrations in your walls and ceiling.[/quote]

knightfly · Post by **knightfly** » Mon Jun 06, 2005 1:19 am

By "2 leaf wall", do you mean separate frames for inner and outer leaf? If so, (or even if a single frame with wallboard both sides) Keith has you covered; if possible, offset penetrations for boxes by TWO or more stud cavities, especially if using single frames - also, don't forget insulation - along with the putty packs, this will help kill the sound leaks from the penetrations.

knightfly, can you pm me with a figure of what people usually would donate

Generally, around $20,000 is average, but if times are tight a mere $10k will do;

Seriously, it all helps with expenses for the site. Don't do anything that stresses your situation. We've had as low as $1.37

and as high as several hundred. I really don't want to pressure anyone into more (or less) than they feel OK with.

Now, if you want one on one consults, both John and I can get a LOT more specific

Steve

Davy Crow · Post by **Davy Crow** » Mon Jun 06, 2005 4:08 pm

yes its an actual two leaf construction with two seperate stud partitions although in the control room area we have gone for a single leaf to save a bit of space. since its a brand new construction there will be no holes on the outer leaf (or the outer skin for the control room) so i think weve got that sorted. although as regards the two leaf system i have just thought of something i might want to ask...
we have gone for a construction of two sheets (different densities) plasterboard fixed to 2" x 3" stud frame with knauf insulation inside stud frame followed by an air gap of an inch (no sheets on inside of outer leaf) then inner leaf frame being a mirror image of the outer leaf frame.

the question i have in mind is will the fact that the perimeter is surrounded by the original brick wall construction change our two leaf construction to a 3 leaf construction? there is no coupling whatsoever with our wall construction to the original brick wall.

again cheers for yer time...

the donation will be made as soon as i have posted this..

$1.37, what a bargain!!

knightfly · Post by **knightfly** » Mon Jun 06, 2005 6:54 pm

"$1.37, what a bargain!!" - yeah, we're STILL shakin' our heads over THAT one...

Yes, a brick wall WILL cause multi-leaf problems - got a sketch up anywhere? including rough dimensions/spacing, etc, would help figure out how bad it might be, or if you may be able to leave out some pieces and do it a bit different... Steve

Davy Crow · Post by **Davy Crow** » Tue Jun 07, 2005 8:19 am

im working on that sketch now. for ages i have been thinkin i had it right. there will be a gap of about an inch from the brick wall to the start of our two leaf construction which is exactly the same as the cross section in this post which gives stc 63 http://www.johnlsayers.com/phpBB2/viewt ... 86&start=0

our CR is built and is the same as the cross section giving stc 36 only it has an extra sheet of gyproc on both sides.

the double leaf areas are not yet built....

waiting on the sketch getting to me before i post it.

cheers for yer rapid replies

im sweating.

Davy Crow · Post by **Davy Crow** » Tue Jan 17, 2006 11:11 am

well its been a while and although not finished completely, we were able to test it for the first time and get the kit blasting out late on. results were pretty good. the stairwell to the residential flats above us was quiet as the drums were being thrashed. no noise outside the premises at all (11pm and dead outside)
weve made a few mistakes (and learned a shitload) along the way but got to say it seems to have been a victorious mission so thanks to anyone who had posted advice.

Post by **sharward** » Tue Jan 17, 2006 12:15 pm

Happy New Year, Davy -- glad to hear of your success!

Got photos? We'd love to see 'em!

--Keith