Forum Replies Created
You simply (if only it were simple) have to put a good thickness of insulation between inside air and any part of the external-skin brickwork. How thick the brickwork; where does the window sit in that thickness; therefore how much brickwork 'shows' inboard of the window frame?
In addition, the frame will be a 'colder' thing, being in full contact with the cold outer skin and also not having any insulation brought across its outside face. So the frame will preferably have best possible PH-grade (or better) insulation within its section.21 March 2016 at 9:13 pm in reply to: Advice: wet insulation at perimeter of insulated ground floor #39226
Carry the EWI down to base of foundation in a trench backfilled as a french drain! and minimise or omit the suspended floor insulation. Esp as it looks like you'd get a good deep downstand of insulation hence a good long path-length through soil, of heat passing down through the basement floor, curving out and up to surface. That 'thickness' of soil makes a good insulator. You'd also get a bone-dry basement and it would be part of the heated/habitable volume.
The current re-write of AD F makes a covert necessity of 24/7 Mechanical ventilation or MHRV – the hole-in-wall-type vent rates are eye-watering. In a current change-of-use 1 bed single aspect flat conversion 90,000mm2 'background ventilation; is required – equiv to a 12″ square hole! That's in addition to 'purge' (opening windows) and Kit/Bath 'extract'. Insane. By contrast. MHRV looks convincing – but client's not ready for that yet!
That was 4 months ago …?
Yes AFAIK all the artificial insulations pay for themselves multi multi times over. Insulation is the best possible use of oil/hydrocarbons, if you must. What was that podcast?
… to take embodied energy into consideration. I think it would kill the standard if every item used in the building, and presumably all of the energy of the building process, had to be recorded
It surely should be an essential part of the building process in general – though we and the world are still practically a long way from taking that on board – otherwise we're knowingly omitting about half the point.
Paperwork – well that's something that's potential with BIM – on-the-fly embodied energy (in fact whole LCA) totalling as the design/documentation progresses – though again, the BIM cos haven't go round to incorporating that data/facility yet. Strangely, mech eng/product design software is much further aheads on just this, than building's, even though sustainability awareness is much higher in building than in engineering.
Clare or anyone interested if I reply to this rather old thread? It's interesting but full of misconceptions, maybe by the German architect, I think.
You mean because the energy generated, which is supposed to cancel the heating demand, all comes in the summer/daytime and is largely fed-back into the grid for paltry payment – leaving the winter/night heating demand to be expensively bought from the grid?
Yes, come to think, it's as clear as that – which makes that 'trading' aspect of mainstay SAP completely irrelevant to reducing occupants' fuel bills (indeed systematically misleading) – therefore irrelevant also to 'fighting fuel poverty'.
I wonder whether the politicians appreciate the latter effect of SAP? Someone needs to publicly trip a politician or two up, when they're boasting about what they're doing to reduce fuel poverty. That might bring a change in this anomaly.
Is that bad actually? If it allows good SAP for a merely medium-insulation building, it's substituting capital expenditure on hi-tech for same on average-tech insulation and airtightness, for same result as far as carbon, energy demand etc.
Yes, having installed energy generation equipment, it's then depriving the nation of that energy product, by 'squandering' it. There might be questions about uncounted eco-footprint resulting from hi-tech, compared to lots of EPS and sticky tape. What else makes the SAP trade-off wrong? It's against 'fabric-first' ideology, but what really is the objection?
I sometimes think this kind of thing is OK as long as the energy product is so lo-grade that it can't possibly be seen as tradeable energy commodity – can't be used anywhere except very close to where it's generated (or captured). That is, lo-grade heat. The building itself captures its residual heat demand from the sun. That seems OK as long as it's coming in through windows, but not OK if it's done via solar collectors on the roof.
Interesting – anything more on this?
What a great and painstaking reply from Adesk – wish my chosen Cad provider could or would express themselves so well.
Going to consult online leaky pipe specialists – any day now! Tell me what you find out?
I have 2 x 2000 litre ex-orange juice barrels (4 tonnes of rainwater) up the slope, providing 4-6m head to leaky pipes in 6.7 x 3m polytunnel. Lasts about a week in dry summer! Ordinary leaky pipes need more pressure than that, so am looking for lo pressure replacements, and tripling the storage.28 February 2014 at 2:35 pm in reply to: Passionate junior Green Architect looking for professional FRIENDS!! #39109
Does Meteonorm cover Ghana? It generates climate files for any location, interpolating/extrapolating from a large array of weather stations. Christian from WUFI/Fraunhofer says these are good enough except for missing driving rain data, which is important in WUFI but prob not in PHPP (or in Ghana!)