Bonner

I am quite sure the ‘site’ in question is the new plot however this is something you can’t afford to get wrong! I would phone your local authority to double check, preferably getting it confirmed in an email.

You need the capacity (volume) to contain a storm surge of rainwater. If you can demonstrate your pipes have 21m3 capacity, BC should accept it.

No, solid timber rafters in this case although I am sure they could have designed with I-beams if needed.

Not necessary in England (AFAIK). I did use a SE but only for a raft foundation and one steel beam. Everything else was covered by manufacturer’s specifications/calcs.

I have a vaulted roof with glutam beam and rafters, designed and supplied by the supplier of my roof trusses and floor joists. They did all the calcs, no SE involved.

They do rotate but their moment of inertia is relatively low due to slow speed. If the wind drops they can stop within a revolution due to drag. Large turbines will keep spinning (and generating electricity) for several minutes when cut off, giving operators precious time to switch over to another source.

I agree, nothing to worry about here. Most likely a slight weep in a joint (if anything) and there shouldn’t be any joints in the screed! You might find the pressure shoots up after the screed is poured due to chemical reaction.

Assume you are referring to @ToughButterCup’s CO2 monitor? My bedroom is typically 1200ppm at night, over 2000ppm without MVHR running.

Another vote for MVHR here, this is my inlet pre-filter after a month! We are in a rural village so probably a combination of wood burner smoke and agricultural dust. Anyway I prefer not to let fresh air in the house.

I think @craig is an expert in window specifications.

Well done for getting those off! It certainly points towards the connecting pipe unless there is a leak from the waste pipe (water can track across the ceiling and only appear at joints). Otherwise you will probably need to cut out the wall to find out what’s going on. Note I am only an amateur DIYer, suggest you wait for @Nickfromwales professional advice before going any further.

Anything is possible, just costs a bit more to carry materials in and out. For an extension you will only need a mini/micro digger which will go up the footpath. Assuming you have access to the road on the left, bulk materials could be dropped over the hedge by Hiab and waste taken away with a grab truck. Suggest getting a local builder round to have a look on the ground.

As it’s not leaking continuously, the problem is downstream from the mixer, from the outlet of the valve to the hose. Can you take the mixer cover plate off to see any leaks? Mine is turn and lock fitting. What about the hose outlet, have you tried taking that off?

Looks like a very old school 🙄

I told them that I am a qualified engineer which they accepted (I am a chartered mechanical engineer but knew bugger all about MVHR before I started!). Was going to do a report but they never asked for one.