Temp

+1 Lots of good programmable stats around these days.

Could the OP "just" lower all the joists? Are the bolted oto or set into the walls?

Would it pass without the breathable membrane? I mean with it replaced by a walk on layer.

Answering my own question i see it says 150mm. Possibly plus a 3 degree slope.

Just a heads up.. is it this one... https://www.glazingvision.co.uk/rooflights/fixed-rooflights/flushglaze-walk-on-rooflight/ I was looking for their drawing of the upstand but I noticed it says keep 200mm clear around the upstand. How close is your upstand to the wall? Perhaps ok but looks less than 200mm? I couldn't see a drawing that showed if it was 200mm from the inside or outside of the upstand.

How tall does the upstand for the roof light have to be?

Have you already purchased them? Can you raise them above deck level? Just means you just walk around them instead of over them.

Or no legs at all. Insulation and walk on decking on top.

First lorry Park for 2000 lorries under construction in Kent.. Daily Mail: Brexit: Photos show 27-acre Kent field being turned into lorry park. https://www.dailymail.co.uk/news/article-8873383/Brexit-Drone-photos-reveal-27-acre-Kent-field-workers-turn-park-1-700-lorries.html Another TWENTY EIGHT lorry parks needed.. I wonder who has won the coffee franchise? Should I buy Costa shares?

This sort of thing? They come in 1245 H and various widths. https://www.kitchendooroutlet.co.uk/kitchen-doors/expressions-handleless-stone-grey/115-396/?gclid=CjwKCAjw_sn8BRBrEiwAnUGJDoLLjIre9f2da1bAJJ_UwRHrjzCT-_hTStZ932DnvBMJn1m999_5_xoCXXIQAvD_BwE

We have doors from JB Kind similar to these but not in oak.. https://www.building-supplies-online.co.uk/doors/jb-kind/oak-cottage/jb-kind-oak-cottage-thames-original-pre-finished-internal-doorjbkint138.html Our carpenter was able to work magic and cut them apart and rebuild them to make about 8 or 9 non standard height doors. Look like came that way. PS I note yours would be somewhat shorter than ours so the header and footer may look out of proportion if cut down that much?

Can you mark on this drawing where the floor sill height would be? Currently it looks like you could replace the 15cm (?) raised decking with insulation. It would also be nice to see a section through the door sill.

Perhaps something like this (it not a clip on though. You need to cut pipe).. £29 https://www.amazon.co.uk/Flow-Switch-15mm-0-5l-min/dp/B0091GOKZ0 same for £18.. https://cpc.farnell.com/sensor-solutions-te-connectivity/fs-10/flow-switch-15mm-0-5l-min/dp/SN36477

Regarding the noise.. Google found this which is probably a different model but.. https://www.vaillant.co.uk/downloads/aproducts/renewables-1/arotherm/arotherm-5-15kw-inst-868573.pdf

Welcome to the forum. Aside: I have a brother in Cardiff and a son at Swansea Uni.

From what the OP says there is no void to ventilate. I guess it might be possible to create a 50mm void by not fully filling between the joists as per a cold roof. Effectively "wasting" the 25mm of insulation they put on top.

Will just have to do the best you can. Seal around the vent pipes etc.

A warm roof works by keeping the roof joists warm so water vapour doesnt condense out causing rot. By adding insulation between and below the roof joists you make them colder increasing the risk that water vapour will condense out causing rot. A cold roof has ventilation on the cold side to prevent this. If you really have no choice I would insulate between and below and add a darn good vapour barrier on the inside. You might get away with it but only time will tell. If you must have downlighters fit a service void below the vapour barrier. In the short term the issue is what Buioding Control will allow you to do.

https://www.ukholidayhomesltd.com/caravansales/cosalt-timber-lodge-0/#.X48Wz9BKi70 ".. all we need providing is a level base with access (i.e. Concrete, Tarmac, heavy rolled stone or concrete flags on grass at a minimum". I wouldn't go for flags on grass but flags on compacted permeable hardcore might work (eg MOT 3 not MOT 1). What's drainage like on site? Otherwise perhaps build your own timber platform on blocks for it to sit on.

+1. Get them to supply and fit then all should be zero rated to you. Google found this. The claimant lost but perhaps only because he made a bad case. You would need to show they were "ordinarily fitted" into eco-homes intended to have a lot of solar gain or something like that. https://www.whitefieldtax.co.uk/top-tips-on-recovering-vat-if-you-build-your-own-home/ "The definition of what is ordinarily installed into what building has recently been challenged in a tribunal case concerning VAT on electric blinds for a sustainable eco-home. Look below for a summary of this case." Edit: This appears to be same case mentioned by @newhome

Its a bit naughty but... Is your foul drain pipe going to be in a trench surrounded by a nice lot of pea gravel? How about the main sewer in the road, is that also surrounded by pea gravel. A little bird told me that in the past they had laid a perforated pipe in along side the foul connection to turn the whole lot into one massive soakaway.

PS: We have a similar overhang with exposed rafters and a beam at the eaves. Birds like nesting up under there we so had to install spikes on the top of the beam.

No. The only issue would be if there was going to be a room up in the roof and the floor of that was in the overhang but the drawing makes clear that's not the case. Rotated to save necks.

What does your Planning Permission allow? I don't believe Planning Permission is required for temporary "Workers accommodation". However everyone living there there has to be capable of working on the site at least at weekends. Children cannot be site workers so if they were living there you would need Planning Permission. Usually you apply for this when applying for PP for the house. If you need but don't have PP the planners may go easy on you if its obvious its going to be a temporary feature while you construct the house. If work on the house stopped and neighbours complained it had become permanent they could easily decide it was no longer a works van and needed planning permission. Long term you might not need PP to use it as an outbuilding as long as its ancillary to the main house. Letting it out probably would need PP. "Log Cabins" vary enormously in quality. Its also been a area that con artists have operated in the past so take care. Some are little more than sheds with no insulation. With some insulation is an optional extra. If you are going to let it out in future it would need to meet the Building Regulations. Pad and pier foundations might be an option but you would need input from the supplier. How much support does the floor need? and it might still look too permanent for the planners.

We have clay soil and soakaways don't work. In such cases you are at the mercy of the water co if there are no other solutions. You can ask if they will allow you to connect to the sewer but many won't allow that at all. You stand much more chance if you are seen to be making an attempt to mitigate the storm surge by using an attenuation tank (with pump if necessary). In our case there was a piped ditch along the road edge. I asked the EA of we could connect into that. They didn't say no but they said "they wouldn't want us to make local flooding worse". So to head off a problem with the planners I proposed an underground rainwater storage tank with overflow to the ditch. This was allowed even though it doesn't provide surge attenuation when full. It's proved very useful in dry summers for watering lawns etc. We have put a pump in it to feed a tap and even run 200m meters of hose to fill up tanks on local allotment.