New build small size high isolation project

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Soundman2020
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Re: New build small size high isolation project

Postby Soundman2020 » Thu, 2019-Nov-21, 10:33

Looks good! But plug the ends of the conduit with something! Even screwed up newspaper. You don't want concrete getting inside!!!! :shock: :cop:

- Stuart -

Purelythemusic
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Re: New build small size high isolation project

Postby Purelythemusic » Fri, 2019-Nov-22, 18:12

Hi All,

What a week, quite tight for timings! The concrete contractors used a polymer modified crete which is designed not to need floating and is self flattening and levelling to an extent...twice the price of normal crete pkus pump amd their labour to lay, but the finish looks decent, much better than your average concrete pour. Unfortunately they underestimated the quantity somehow! So I was left to do the corridor, luckily my usual supplier could get it this afternoon...I usually get mix on site so you don’t have extra or run out! We tanked the corridor this morning which is the right way round anyway so maybe it was meant to be : )

I haven’t been able to get in to take a pic of the studio floor yet...still a bit green! Got as much conduit as time would allow! Learnt how to bend conduit which enabled large radius bends...

Render is being delivered on Tuesday, just need ro decide whether to render in any power cables... power cables remdered in is doable but back boxes for sockets etc are not really possible as we’d have to chase out the precious inner wall plus remove that area of tanking, neither of which seem wise! We could fix them to the render/plaster finish using adhesive or super small screws, plastic fixings or small resin fixings...possibly!

Silencer design is in the final stages and we’re going to make our own doors.

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- Success in music is being able to make music whatever your situation -

Purelythemusic
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Re: New build small size high isolation project

Postby Purelythemusic » Thu, 2019-Nov-28, 16:00

Hi All,

As we’re rendering...we’re using a One Coat Render with mesh embedded...

I’m wondering about finishes. I had thought, plaster for the inside of the studio and masonry paint on the corridor.

I have been thinking about thin coat acrylic render (corse is 1.8mm thick colour through render). It’s more expensive than just paint but you can get nice textures... I thought corridor could be medium aggregate blah blah.

For the inside of the studio, is there a benefit to making the side walls a bit irregular... like the 1.8mm aggregate, or is it too small to have a scattering effect...do we even want one? I think anything rougher than that (like tyrolene) might be uncomfortable for the occupants...

Just a thought : )

Fyi current plan for inner room cables in the wall, it to hold the cables in place with Sticks like turbo... 15min cure time and can go on wet substrates... I don’t want to use clips as they’ll go through the precious tanking!

Oh also I made a mistake when pouring the corridor concrete...can you guess what it is yet!? : )

Update tomorrow!

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- Success in music is being able to make music whatever your situation -

Purelythemusic
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Posts: 43
Joined: Sat, 2019-Oct-12, 18:39
Location: England - Bristol

Re: New build small size high isolation project

Postby Purelythemusic » Fri, 2019-Dec-06, 20:32

Hi All,

Been quite a tricky couple of weeks as the cool weather and lack of natural air flow in the building has meant the internal render has taken ages to set up...also more than half of it is on tanking which means there is no natural suction to bond it to the masonry...

Basically I’ve been out most nights floating up the render we put on before midday! Sometimes it’s still not been ready!

Anyway, corridor is almost completely rendered and studio is rendered ready for skimming the 2 side walls and front wall.
Ceiling blocks had a coat of tanking as we had it lying around which should seal the blocks up nicely!

Cables that need to be in the walls are there...Sticks like ‘’ turbo worked a treat.

C’est Voilla!

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- Success in music is being able to make music whatever your situation -

Purelythemusic
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Posts: 43
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Re: New build small size high isolation project

Postby Purelythemusic » Sat, 2019-Dec-14, 19:59

Hi All,

Bit of a slow week, now lost all my helpers : ) on your own things take longer but also are mentally more difficult without other people to bounce off!

Skimmed the 3 walls that may be partially seen, cut the section of concrete from the corridor that was causing a flanking path (no one spotted it) : ) which was a hideous job. Rendered the entrance wall and was going to get ready for top coating the corridor but the rain and wind this week has been intense and with the moisture inside produced by drying our render and plaster the corridor render was damp...either from condensation dewing on the coldest parts (where the masonry is soaked from the outside) or from the soaked masonry coming right the way through! This may have been compounded by me having to take the plastic roof off as it was starting to pull the scaffolding in on itself...a job I did at night : )

Either way I decided that I needed to give the roof some attention and the exterior. I put a 5mm render scratch coat on the outside on the worst bit, cut the membrane to use it as a bit of a gutter rather than have roof water running straight down, and decided the roof verge details and ordered the suitable products from the manufacturer with their guidance. The field tech came out on Friday and we’ve done a ‘peel test’ to check the AC primer (which can be used down to 0 degrees and have a very fast cure) will bond to the concrete. I spent the rest of Friday prepping the Aluminium trim which I am using for the verge detail. Hope to get this on next week so the rainwater from the roof doesn’t saturate the concrete and the majority of the water off the roof falls outside the masonry.

Pics end of the week:

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- Success in music is being able to make music whatever your situation -

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Soundman2020
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Re: New build small size high isolation project

Postby Soundman2020 » Sat, 2019-Dec-14, 22:34

I've been away for a week, and just catching up on threads, so....

Silencer design is in the final stages and we’re going to make our own doors.
Yup! :thu: I sent that to Tom yesterday. The entire HVAC design is in place, but will need a bit if tweaking because of some comments that Tom sent me earlier today, about his plans for the "lobby/storage area". Basically, he wants as much as possible space up near the ceiling for his storage, but I'm using most of that for the HVAC AHU and duct-work. So I'll be moving that as far down the room as I can, to free up some headroom for storage.

Also, the door design is roughed in now: it's based on the "site-built door" thread: viewtopic.php?f=12&t=23 .. but even beefier, because of Tom's extra high isolation needs. We'll post more details on that as the design is finalized.

Basically I’ve been out most nights floating up the render we put on before midday!
Fun and games! Playing with render is fun, isn't it? (Not!) But it looks great, Tom. You seem to have done a good job there.

For the inside of the studio, is there a benefit to making the side walls a bit irregular... like the 1.8mm aggregate, or is it too small to have a scattering effect...do we even want one? I think anything rougher than that (like tyrolene) might be uncomfortable for the occupants...
Probably too late for this comment, but no, there's not really much benefit from that, unless it is extremely irregular... and uncomfortable, as you say! There's a basic principle of acoustics that sound waves can only be affected by object that are about the same size as the wavelength, or larger. So a 1.8mm variation in surface would only have a useful effect on extreme ultrasonic frequencies (!) Your dog and any bats that take up residence in there might appreciate it... :) If the surface undulations were maybe 2cm deep, that would have an effect for frequencies above about 15 kHz... still not very useful. Besides, most of your wall surfaces are going to have some type of acoustic treatment on them, so the effect would be unused in any case.

Just keep them flat and smooth, and let the treatment do the job.

Oh also I made a mistake when pouring the corridor concrete...can you guess what it is yet!? : )
:shock: Ooops! You forgot to decouple? :)

cut the section of concrete from the corridor that was causing a flanking path
:thu: What did you use to cut that? Angle grinder? You'll need to fill that gap that you created there, at some point. Backer rod and caulk will do the trick..

with the moisture inside produced by drying our render and plaster the corridor render was damp...either from condensation dewing on the coldest parts (where the masonry is soaked from the outside) or from the soaked masonry coming right the way through! This may have been compounded by me having to take the plastic roof off as it was starting to pull the scaffolding in on itself...a job I did at night : )
You probably don't want to hear this, but it's going to take a long time for that to dry out properly. Once you get the HVAC in, you can set it to just circulate air through the studio, and maybe dehumidify as well. Even so, it's going to take a while. Don't forget that your underlying concrete is still curing, and will be for months. Concrete reaches maximum strength after a month or two, but carries on curing for years, actually. It's a common misconception that concrete "dries", as the water evaporates, but that's not the case: concrete does not "dry"... rather, it "cures". Its a chemical reaction that takes up the water, slowly, and it takes years to fully complete, if you get down to the microscopic level and take a close look. So don't expect the room to be fully dry for a long time yet (weeks to months: not years!). Especially in your current damp environment outside, with the rain and high humidity: it takes even longer like that.

Pics end of the week:
Looks good! Or rather, itl looks ugly, which is good, because it is supposed to look ugly at this point!

But do protect your conduit bundles. Those are fragile, and a dropped tool or careless move could damage them. Put something over them, such as an up-turned bucket with a brick on top, or a wooden box of some type.

You might also want to protect the ends of your hanging metal ties, so you don't hurt yourself with the sharp tips. Bits of scrap rubber pushed over the ends will do the job. Or something similar.

- Stuart -


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