Thorfun

are the tiles rated to take the weight of ceiling speakers? the frame is probably the same weight as the MF ceiling tbh. i doubt there's much in it. so the plasterboard will be the main difference

this is the TV room on the ground floor. basement comes much later. need to get the main house finished first. don't want to end up a lifer like you. 😉

it's a small room about 5m x 3m so the costs for the MF ceiling is not that high on top of what i would pay for not dropping it.

so it's still imparting a downward force on the beams above

does that grid system attach to the beams above?

so, for the dropped ceiling i guess i could look at completely decoupling the false ceiling but then that would add extra load on the TF and might cause those calculations to fail? but i'm also asking for the rest of the downstairs as all the posi-joists are designed with the 200N/m2 load on the bottom chord. so, from the way the guy was talking (although i think there might've been a bit of understandable arse covering going on) i wouldn't be able to double board anywhere.

ok, i've had some bad-ish news from the posi-joist company and i'm looking for some smart people to assist with the physics and maths and i know there are plenty on here, obviously that includes @pocster 😉. they have said that the bottom chords were designed to take a load of 200N/m2 (see @SteamyTea i got the units correct unlike some around here) and they said that a single layer of 12.5mm plasterboard is all i can put on the bottom chord of our posi-joists. they did say that as they don't have the job file which is probably now lost amongst the inaccessible files of the now defunct Flight Timber and so they cannot comment more. they are going on the details on the joist layout document that Flight sent me. so, from a quick google is seems that 200N/m2 is equal to 20.394kg/m2 and according to Gyproc their standard 12.5 wallboard is 9.7kg/m2. so, a double board of this stuff should only give a force of 19.4kg/m2, right? therefore i believe that the bottom chord should take a double board of standard 12.5mm plasterboard, right? anyone know if the above calculations are correct? and does anyone know what sort of load the MF dropped ceiling would add?

i hope not as that's my kids bedroom! 😱

we're putting 100mm RWA45 between the joists. there will be an extra 100mm above the MF ceiling as well and it'll be double boarded and sealed with acoustic sealant around the perimeter etc. as it's the TV room i want to reduce the noise transfer to the bedroom above. i have a very good relationship with my Jewsons which has been built up over the last couple of years much to many on here's confusion as they all find Jewson stupidly expensive! i did start with an account at TP but have never used them as their prices are really high in comparison.

Thanks for this as it just proves that my local Jewson continues to give me better prices than I can find online. Plus I can buy on credit.

I can’t believe you were try to do angled cuts WITHOUT a mitre saw. 😂

Out of interest was ESP one of those other manufacturers? Had a quote from my BM for both Gyproc and ESP. I said I’d probably go for Gyproc as I figured in this instance you probably get what you pay for but he said he’d never had any complaints about the ESP stuff.

I don’t have a gang, just me with the occasional help from the mrs.

I seem to recall @nod saying ditra mat and glue is 6mm and tile adhesive is the same thickness as the tiles. So if you’re going for 9mm tiles I’d suggest 25mm for floor makeup. I’m sure there are many threads on this very topic if you search so you can double check what others say.

What screed are you putting on top and what depth?

only just seen this thread with this recent resurrection....has made me chuckle this morning, thank you. 🙂

Not possible as the 2 slabs join the main building with a basement where there is block and beam and which was a massive void when the slabs were poured.

Too expensive and too small capacity for me. But we all have different needs so could be good for someone else.

if you click on 'Order' is redirects you to their Kickstarter campaign (which hasn't actually reached it's funding goal yet with only 10 days left to go). delivery is estimated at Mar 2024 and as will all things Kickstarter there's no guarantee it'll ever get made and if it does whether that'll be on time or not is also another question.

take a read of the https://forum.buildhub.org.uk/forum/124-energy-storage/ sub-forum. loads of discussion already on this subject.

looks interesting but is expensive and pretty low capacity. looking at the Kickstarter campaign you'd be paying £1700 for 1.5kWh storage. my LuxPower setup was 6.4kWh storage for around £5k. my installation fees were paying my electrician to connect it up as I fitted the inverter and batteries to the wall myself. I guess it all depends on what you want or need and the size of your array and what you currently self-consume. but there are other expandable systems out there. probably worth doing a lot more research on the subject before making a decision.

Can this be automated?

It was a bit of a confusing response but I think we’ve read enough of @pocster’s posts to ‘know’ what he means. It’s just like learning a new language full of Pocsterisms.

what happens during the day if the house is using more than is being generated? will either of the batteries discharge to make up the difference? sounds like during the day both the batteries are set to charge only is why I'm asking.

that's for a structural engineer to determine. there are some SEs on this forum ( @Gus Potter is one that comes to mind) who might be able to assist but I think you need to take a breath and wait for the other SEs you've engaged to respond. you've done the right thing putting things on hold so take the time to get a second or third opinion and when you have more information make an informed decision.