SBMS

Thanks. Glazing wise that includes a vaulted rear window, 2 storey glazed entrance and 13m of sliding doors. I put all the glazing into a single column in spreadsheet. As said though, even removing glazing doesn’t make a massive difference. 2 sets of French doors and a side door make up the doors. is 0.75 bad for air tightness? I know 0.6 is passivhaus so thought I’d target just above? Am I correct with the kWh per square meter figure?

Have been having another play around with the heat loss calculator. Have a couple of questions - I have plugged in the following numbers: We have a fair amount of glazing, but to be honest it makes little difference if I remove all the glazing. This generates an annual heat energy input per annum of about 14,000 kWh. If I take this and divide it by internal floorspace (circa 397m2), the energy per sqm is about 35 kWh per annum per sqm. Passivhaus stipulates less than 15 kWh. Even if I removed all glazing doors and rooflights, this shifts it to about 24kWh per sqm but still significantly out. Am I missing something? How would this figure be achievable? Am I reading the heat energy input values (row 84) correctly? I just added them all to get to the 14,000 kWh figure. Be really useful if anyone can share their calculations @TerryE think you mentioned on an earlier post an 11,000 kWh energy input. Am trying to figure out what moves the needle to get such a low input value?

I did try that but I noticed the u value difference for cavity widths they published weren’t linear? So assumed there was more to it?

Has anyone got the u values for standard cavities for EPS beads in a cavity (eg ecobead platinum), for different cavity thicknesses? have found some numbers but most stop at around 200mm or 225m cavity. Wondered if anyone has them for 250mm, 300mm?

For those self builders that went with traditional masonry/brick and block and aimed for high levels of airtightness, what was your ACH figure? Trying to get a sense of what’s achievable with careful detailing!

Company near to us offer a 192mm panel that is 0.13 u value if thats not too big?

Was after the price per sqm for the kit/superstructure, not the finished article.

@JohnMo have you got an aversion to TF? You prefer masonry? Genuine question out of interest as still looking at all options.

Interesting what you say. One of the perceived benefits of off-site TF seems to be speed but all the manufacturers seem to quote 16-20 week lead times. There’s a lot of house to be built in 5 months; I suspect the total build timeframe between different methods works out the same. @Gus Potter would you choose TF (stick built on site I assume) over masonry if building your own?

Yep completely agree. They’ve done our design and phase 1 and have been excellent. I think it’s pretty decent price to be honest and hopefully helps give some context to the OPs price which seems a bit bonkers 👍

If of interest just had our quote back from our architect of 4500 for full drawing back and submission to and liaison with building control.

We are just about to get a quote for our drawing pack and SE will update on here.

Brilliant.

Did you do beam 3 to avoid curtain glass? Are you cladding the front of it or doing it in brick

Thanks for the feedback. The elevations drawings aren’t representative of the window style. It’ll be more like this: Done in aluminium, not really twee or cottage like. The black cladding is on other parts of the house as well: the architect has tied it in. I’ll post up the full design at some point. The feedback on the doors though I agree with and hadn’t to be honest noticed till now, so will definitely be switching them out for solid.

Interesting point.. I might ask the architects to do a version with solid doors vs the glass doors, is it the glass doors you think could make it look like an office?

Nice! Do you mind me asking how much?

Because of...price? Structurally impossible? Look naff?

Hi all Still at design stage and architect has designed a front glazed opening with a door and 2 storey glazing. It's 2700mm wide and 4700mm tall. We are having an open gallery so there is no floor that would allow us to naturally separate the glazing into two units. Do you think curtain walling is the only approach? I wondered about whether to put a small-ish steel in at the first floor anyway and clad it on the outside and inside, allowing us to go with conventional aluminium glazing/door below and above? What are people's thoughts?

To answer your original question, yes you can reclaim VAT on flooring with the exception of carpet and carpet tiles. Be aware that if you’re having it installed then the installation should be zero rated rather than reclaiming.

Leave what unattended? The bats or the ecologists??

Same position?

Thanks all. Has anyone had any experience of firms in Lancashire that are reasonable and quick? Am looking at a couple options but any recommendations would be appreciated!

Thanks Temp But I think it now has to be part of the initial application in order for it to be validated.