ToughButterCup

Has the manufacturer got some : If-Your-Name-Is-@Pocster installation instructions?

'... enthelapy and moisture heat ....' I know its early on a Monday, but its in at the deep end - for me anyway. Given that Tinternet is full of shared ignorance, could you point me to something authoritative 1I can read up on enthelapy, and moisture heat please?

Now that, that's interesting. .... unless I could automate a system I invested in four or five SensorPush data loggers. Work on bluetooth, log every few seconds, and while not cheap, they are cheap enough for me to buy some. Mine ran for four years before the battery failed. Still working 6 years later. The output is easily understandable and can be sucked into a spreadsheet with ease. Here's a quick look at a years' data..... suggestions for 'box' construction Dunno. But I know who will have an idea : @Onoff @SteamyTea, @MikeSharp01, @Jeremy Harris , @TerryE, @JohnMo and especially @MJNewton You bought a core cheap (FleaBay) Can you explain what a 'core' is - yes it's a heat exchanger - ..... but what's the search term I should use so I can while away the long winter nights fantasizing about doing the same as you have..... There's just one niggly naggly thing in the back of my mind...... The Apex DIYMAX man himself , @Jeremy Harris built all sorts of things on his MVHR installation ( he's likely building a nuclear reactor out of matchsticks somewhere right now). But four years after he had finished his install, he wrote about how he wished he had bought off the shelf stuff - maintainability and spare parts was the issue. FoockIt: the end result doesn't matter, it's the journey that counts, right? 😐

Might be a useful idea to log those temperatures over (say) a year and post them here. I'm really interested in the detailed design of what you did because we're fairly close to second fitting an MVHR system, but as usual don't have enough money. Do any manufacturers publish expected differences between the intake and outlet temperatures? Perhaps they might also do the same about the difference in expected relative humidity? Anyway, have you got any photographs of your self built unit? Don't be shy now...

It might be an idea to use an opening (for the fan) that's on the down-wind side of the house....

Drop in at my place and check mine over when yer driving south on the M6 from Cairn Ryan .... Are those numbers (or rather the differences between them) what you'd expect?

Ughhh. You have my sympathy. No point in looking back or anything like that. FLIR camera: good start Airtightness: key issue First thing - a survey of what's leaking in , where, and a judgment of how much - set priorities Go for the easy wins first - doors, windows, letterbox, sockets, ceiling rose A concrete block build you say - with cavities filled with insulation. Lets assume (for now) that that job has been done properly. Would you mind telling us the trade name of the build system please? Does the manufacturer have any guidance on airtightness? Has it been followed? Who designed the house? What was the Building Regs submission - what was the airtightness strategy in that submission. What was your air-tightness score? Break the problem into bits. Prioritise. Source materials. Ask us for advice on each little bit. Only too pleased to help (And we're nosey as £uck) Head-Down-Arse-Up-Go. Every single Self Build £uck-Up has its up-side. Look for it and you'll find it. Good luck. You are among sympathetic friends here. Ian

Not only training and experience, though. Attitude is one of those hidden aspects of any domain which hides in plain sight. You can be trained and be experieced all you like : if - post training - your attitude accepts a bodge as good enough - because you can hide it , then unless theres extrinsic motivation (...I'm going to lose my licence to pratice ..) , you won't develop as a PERSON Think check-rides as a train driver / pilot / bus driver. Who check-rides a plumber? ( shaaaadup @Pocster )

I have a strong feeling that the dire state of the housing sector plays a strong role in promoting poor work. Haven't we all talked to tradies who sneer at the building standards of the major providers? Who snigger at the Building Control regime. But the market will take care of that issue won't it? Building Control officers in Germany are really powerful. They can ( or could when I was there) recommend that builders (tradespeople) lose their licence to practice. And the trades' association vigorously police their members. A German mate once said to me - Why should I employ a chimney sweep who can't manage a large block of flats? - Cos someone else will do it cheaper...? ( I seem to remember it takes about 5 years to qualify over there) - Das ist Scheiße.... That translates as it sounds

Well how about her managing me then .... we all know @Pocster's a bit , well, you know ...... ??

The Due Diligence Process.

We often have this discussion about skills - it runs something like ' We need more skilled people for for trade xyz' And I always suggest that skills are just the icing on the cake. We need to give tradesfolk parity of esteem with their non-trade colleagues. Until there is a rigorous and universally accepted Apprenticeship Scheme - one that engenders respect in the pub and the building site, then we'll continue to suck our teeth with irritation. The German model isn't perfect. But it's better than ours. And Apprenticeship depends on an excellent education system: one where those not going to University have the opportunity to get highly respected qualifications as trades people. And there's less than no chance of that.

Ughhh, same here. I would say that most of the trades that worked here ignored Debbie. In the worst case, the MD of DURISOL talked at her while walking away - and faced me instead. When blokes treat her like that, I have come to enjoy the anticipation of the way she brings two verbal bricks sharply together on his withers.

In relation to the OP then, are we saying to @Seasider Felt the roof to cure the leaks Design and build an appropriate walkway using GRP Fit the walkway Because if we are, we've hit yer man right in the bank-balance. @Seasider - if you can bear it - ask for a quote ( .... erm 3 quotes ) to design, build and deliver you a @SteamyTea - approved walkway. Thinking of your bank balance, might it be possible to just have the walkway, and leave the rest of the flat roof 'til later?

It doesn't matter what it carries. If you have to wonder whether it's a significant problem, it is. So treat it as such until you have more evidence.

Hmmm, easy.... the discussion goes like this.... Muggins " How many ovens do you need love?" SWMBO "4" Muggins "Wha? 4 ... why ? SWMBO "How many cross-cut saws have you got ... and I think I saw about 6 or 7 drills - some of them huge in that massive cupboard of yours, then there's the table saw - and the 'spare' in the other container . And (warming to her annoyance) how much did that lot cost eh? Tell me that ? LONG PAUSE ................................................. Muggins "Well ducks, ya should have told me that a year ago when I asked you to approve the kitchen plan. ... not enough space now " I have learned the hard - very hard - way that when I play an ace, I should never - ever - ever - grin.

What you need @Ozpos, is a visit from @MikeSharp01 . I had a problem with one of my inlets. He took one look at it, grinned and said "You don't need that one" Top bloke.

Our cooker: 10mm feed intended - until reality struck. Now there's 10mm to a hewooooge socket and a 13 Amp plug to a Bosch (natch) induction fingy.... 10mm - I could hardly cut it with an angle grinder ......

10mm is 'king hard work.......

Plumbing isn't just a trade. Its a language too. Nipples, irons, CT1, tapered threads, 92.5 degree bends, noggins.......... 'King nightmare.

Nail gun ? Screws ?

I was hoping you would join in @SteamyTea. In terms of GRP walkways, what does .... Done properly ... mean in practice ? I ask because I'm not aware of any GRP walkways - or perhaps I just don't notice them when I walk on them ? @LnP was your GRP roof also used as a walkway ?

@Seasider raises an interesting question: How can you make a leaky concreted flat roof waterproof ? Is a triple layer of felt adequate for the job? My feeling is that in this case (because the the roof doubles as a footpath) it isn't - Or if felt is OK for a while - it soon won't be : shoe, stone, heel, puncture, leak, frost, thaw, bigger leak, peed off @Seasider. Somehow, shoes need to be kept off that roof. Marine ply walkway on 4 by 4 bearers?

In our case, I asked the same question. No - was the answer. But since we built on a gentle slope, we just shoved the top layer (made ground) downhill.

With the very best will in the world, @DuncanAndrews, our collective genius and experience can never ever be cited as reasoned evidence to counter a qualified SE's opinion. All we can do is to advise you to do some Due Diligence among qualified and experienced SEs. All SEs aren't the same. Some experienced, some not. Some specialised, others not. Some go by the book, others engage deeply with the topic because of a special interest. Get 10 SEs in room and I bet there will be a wide range of opinion. Our SE ( a foundation raft expert) was asked to specifiy for some ICF rebar for us. Once that spec was submitted to a specialist ICF SE, well, his laughter from the Home Counties could be heard here in Lancashire. And saved us about £3k. Ask two more SEs for a specification - and make sure one of them is experienced in working with Velux products: a truss design firm might be useful. Do Velux have specialist SEs? Time to get on the phone.....