Bonner

Why do you want to move the bathroom to a corner, will need a corridor and take up window space on the front and rear aspects. Bathrooms are in the best place IMO, create a utility in the back of the garage.

I think you need to size for a 10 year historical storm with a climate change rainfall intensity factor (40% in my case) so 3m³ soakaway seems a bit small. I have 10m³ for about 200 sq.m roof, good infiltration rate. You don’t need to have it all in one place, I have four, roughly one at each corner of the property. I am convinced this is a better solution anyway, more surface area for infiltration and shorter drain runs. My drainage engineer has retired unfortunately but I found him (and other ideas!) by looking through local planning applications.

Normally the works must be done by an approved contractor, whoever is doing it should have a suitable drawing.

My BCO noticed the lack of trickle vents so I showed him the MVHR, ooh that’ll do the job he said. I self installed and did fill out a commissioning sheet but never submitted it and it wasn’t requested.

Glad you got good advice. We were building through COVID lockdown and it’s after effects. Many times I wanted someone to talk details on site or in a workshop but couldn’t.

I have the 350 m3 version, works very well for me. Super simple unit, been running for four years without issues.

I used TK, everything done off their design tool with at least 5 revisions. Phoned them a few times, not visited but they might be open for a chat in their office. Who is fitting it for you, probably more important to check the measurements on site.

Don’t know any rule for this but I tend to find a picture or drawing that looks right and measure the proportions with a scale rule.

I’ve got less than 200mm cover albeit close to the house. I would be concerned by a concrete mixer, cars exert relatively low ground pressure, and that is distributed significantly even 200mm depth. Also more confident about PVC pipe which will flex, than a rigid pipe.

Also with EON, looks like that rate applies only on standard import tariffs, 6p/kWh if you are on their EV tariff?

Just show that on a drawing. I don’t know any specific requirements, maybe they vary between each LA. As long as they are not blocking any access or parking provisions, double they are interested in what they look like considering they keep giving us more of them.

Porcelain tiles? I considered polished concrete but couldn’t stomach the cost for something I thought less durable.

@craig, may know them

No personal experience of them but found their website https://hbdsystems.co.uk/hyline-sliding-doors/ Would be surprised if they manufacture themselves, maybe rebranding something from Eastern Europe?

Another vote for glue, two part epoxy and dowel (stainless or brass)