Nickfromwales

Yup. And can be made to feel solid, and quiet.

With a non-recirculating extractor, every ounce of benefit the MVHR provided that day will be obliterated the second you put lunch on. Go see some "less crap" recirculating extractors before you base everything on one piece of junk

Assuming ICF or masonry / cavity build? What about your target airtightness score if considering MVHR?

Any lack of continuity, and "bye-bye" to the acoustic qualities Have you looked at hollow-core concrete planks as an alternative? The 1st floor will be inside the thermal envelope, so insulation is moot.

They keep all the best things for the English......even our bikes have square wheels.

Pea shingle is fine tbh, just throw the first sheet of EPS down carefully and use that as a walking board to lay the rest, eg without disturbing the rest of the levelled shingle. I'll be making up a straight edge and some perimeter timbers as a slide, to level this in minutes. If this isn't right, the whole thing is fecked so I'll be going to town getting the shingle level / flat etc. Maybe use gravel first, then just have a 50mm layer of pea shingle so levelling is a breeze. Bollocks to whacking / compacting layers of stone. It's a shed, and it'll be the best damn shed for miles! The beauty of a raft is that it doesn't need to be absolutely perfect underneath, unless it's taking a 2 or 3 storey 5 bed house that is. The steel in the concrete deals with any minimal depressions / voids that happen over the next few years from settlement. If I carry on designing this any more, they'll be holding my fecking wake in it!!

Have you committed to the MVHR? It sounds like it will be an expensive ornament, sorry!

Bonjour!

Hi. If you cannot attach to the oil heating system, which is 100% what you should be doing btw, then you may as well just install an in-screed direct electric heater wire and heat the slab up instead of a stupidly expensive SA / Thermino as the slab will have inherent storage and release characteristics already. Before we advise any further, we would need to know how much insulation and how thick the slab / screed will be, please? You'll get probably less than 3 hrs of space heating from the largest SA unit, the 12-14kWh one, when fully charged, if you're lucky. Every one of these I fitted for space heating, with plans and designs approved directly by SA, ended in very expensive arguments / tears. The ones that didn't blow up, that is

Floors down first, every day of the week. Makes for a much nicer look to the cuts around the room, and also allows you to seal the floor tile to the wall around shower / bath / splash zones. Plywood, glued and screwed onto that floor will be easy, cheap and simple to do ( with minimal additional build-up / height at the threshold ), and defo screw the floorboards down tight first, as if you start with a loose floor, that's what you'll finish with ;). I've never, not once in 30 years, laid a cement board down when tiling a regular floor, like this one is. Way too overcomplicated AFAIC. For sound deadening, the floorboards, plywood, adhesive and tiles will get you where you need to be. If you're super fussy, pull up the floorboards and fill the voids with acoustic wool. Then when you re-lay the floor you can mark off services etc and screw the FB's back down with extra gusto! If going for an UTH mat / wire, defo use insulated tile backer boards ( Wedi / Marmox etc ) as the response time and wasted electricity would otherwise be a bit of a PITA ( but not the end of the world ). It's 1st floor at the end of the day, so the UTH would be strictly a comfort installation, but on a concrete GF room it would be almost obligatory these days.

As long as it’s like for like I don’t think it’s notifiable. It’s not a change of purpose. Ventilation, and air admittance on the SVP will be the hot topics, and insulation on the external walls. If lighting / electrics etc is all new that’s going to be notifiable.

It will, just, if it’s within 2m. It’ll be well north of 15m2 that’s for sure! 8.8m x 3.3m internally to just cheat the 30m2 rule most prob. That’s the one rule I will observe to the nth degree! I think for most other misdemeanours you can beg forgiveness retrospectively.

I wonder how long a Fray Bentos would take? 6 or 7 batteries lol. All day breakfast in one tin. BOOM!!

Meals on wheels!! 👊

😲 I don't know what type of girls you date mate, but that would give even a hippo a limp!!!

I'm working on not actively pissing the neighbours off with a monstrous build, but after that I'm just going to fill the space up and worry about a retrospective PP app if I have to. More fuel for digging out an extra 200mm or so of spoil and dropping the building / ridge height as much as possible. Life's best when everyone is playing nicely together at the end of the day . I'm happy with 2.1m minimum internal head height and a reasonable pitch apex roof ( solar E/W split ) and hopefully nobody will give a toss.

Tell me about it. I have one. Luckily for me they've clearly used up more than their 50% in PD, so I doubt very much they'd be causing me any grief.

Tosser. They're #1 suprimo tools. You're just not using them badly enough if you don't rate them.

Condensation will only be an issue if the surface vs ambient temps are a way apart. Maybe try it without lagging for a season, and lag if absolutely necessary? I too consider it a crime to hide all my lovely plumbing, but it's a cross we each have to bear!

The little heater at the bottom with the wire going into it. Isolate the supply at the CU, remove the nut and cover, post a pic of the guts.

For those who don't know, the Swindon National Self Build & Renovation Centre is hosting its second public exhibition of the year in one weeks time. The exhibition is repeated again in September for any who may miss this event. For more details: https://www.nsbrc.co.uk/ J16 - M4.

12mm / 14mm max at 450 o/c.. You can add the extra after the slab has cured. Just use Illbruck 330 foam or some EPS adhesive, bonding to both the existing insulation and the side of the 100mm soleplate. May be a good idea to incorporate one linear run of 1/2" rebar right around the perimeter. Steel is cheap enough. It's enough to drive you mad when you stare at these drawings for long enough!

@Ticky Why the 25mm anchors? Do you live in a hurricane zone? 🤔

Yes, disciple boy, it's the dogs bollocks.........🙄 You go slip into your white, full-length gown and go read from the owners manual. Apparently, if you read it backwards it, it'll tell you which car to buy.

It's called the Blue Oyster now. Oh yea, I forgot those stupid T PW's are only A/C coupled. He must be chuffed that he has such a blinded army of faithful followers ( aka disciples lol ). I'll be hybrid with oodles of juice to do what I want with, whenever I choose to. You'll be able to use all of what you generate, up to the point where the batteries are both full as an egg, and up to your base load, and only then will the rest go to the grid. "Chill, Winston".