Nickfromwales

+1 on not needing it to be 'not flat'. Many GRP roofs are fitted because of this attribute. Panic yea' not.

Seemed to be massively hung up on RER when I recently put one through ( NZEB targeted but we got it down to ZEB ).

Was that higher than the top of the WC cistern?

Fill the WC pan by flushing the loo gently, like part flushing it, or by filling the pan with a jug. Note the 'resting' water level. Then put a wedge of bog roll, ( folk often refer to this as 'toilet' or 'loo' roll, ( in the same way Hyacinth Bucket is pronounced bouquet lol )), and flush it fully. See if the resting water level is now down much lower, eg as low as the throat of the WC pan. If it's lower after flushing ( products + water btw is important for this test so don't be shy with 'the roll' ) then the stench will be coming from the WC.

Not entirely, but he is using it in the wrong context. You can petition the BCO on a signed off job to take the factor of 5 or factor of 10 ( if they've been lucky in love that morning ) where OPEN vents to atmosphere are required to vent the network sewerage system and each dwelling must participate in that duty. If the BCO looks at the topology and agrees that losing the vent ( aka stench pipe ) is not going to be to any detriment then you may get permission to do away with it. NOW; As jerk-face aka your plumber has simply said you don't need one, some questions arise. 1) Is this ground or 1st floor? 2) How many bathrooms T into that one stack? Building regs will stipulate that you cannot omit an AAV on a vertically downwards discharging stack if the fall attains a drop of 1299mm or more ( from the bottom of the WC pan outlet to the bottom of the horizontal sewerage pipe at the manhole that it discharges to ) which is referred to as the "invert". The logic is, that after you discharge your Sunday roast plus 7 pints of Guinness and flush the loo, the contents of the pipe travelling south will, if travelling south for more than 1300mm, create a vacuum behind it as it falls. That creates a deficit with some welly behind it in the above waste network. That force, albeit it only momentary, literally sucks the water out of the basin / bath / shower trap ( whichever is the one with the path of least resistance ) and then that leaves a clear path from the sewer gasses in the street and your nostrils ( can be hugely exacerbated by a windy day for good measure too ). So, the issue you have is allowing a bit of air into that cycle to alleviate the 'drop''. Can be done easily by T'ing in a small AAV ( 40mm ) behind the bath panel ( 9as long as the bath is connected to the same stack in the same room as the WC ) and also, if the issue persists, the basin trap can be changed to one with an integrated mini-AAV. DIY for this is certainly do-able

If this is a Friday night, we can (expletive deleted)ing well look out for tomorrows instalment ?

https://www.jtmplumbing.co.uk/central-heating-controls-valves-c436/esbe-valves-controls-solid-fuel-products-c509/mixing-valve-c511/esbe-valves-actuators-3-point-p19117/s20737?utm_source=google&utm_medium=cpc&utm_term=esbe-valves-esbe-ara652-3-point-spdt-230v-6nm-60s-actuator-esbe-valves-esbe-valves-esbe-ara652-3-point-spdt-230vac-6nm-60s-actuator-12101700&utm_campaign=product%2Blisting%2Bads&cid=GBP&gclid=EAIaIQobChMIha-U0qrw6wIVgc_tCh0Q0gfiEAQYASABEgJx4fD_BwE Liking the above setup too. Going to ask their tech support a few questions to get a proper heads up.

Pour hot bitumen into the holes. End of problem.

Octopus Energy tariff into an decent sized UVC for 4 hours a day on electric only? Would need 6kW of immersion minimum and sizing the UVC so it never went fully cold. Room for possible daytime PV input too then. Plumbing in for the gas just for DHW would be expensive on capital, but a small system boiler for everything ( doing away with the ASHP ( and certainly any foolish attempt to heat water via the 'Aga' )) would be best option.

Categorically, no! The MBC timber-frame offerings that I have been around are graveyard quiet ( the ones with 300mm of Warmcell blown in to the walls and 400mm of Warmcell blown into the roofs, to be precise. Don't confuse sound created by walking through a property and hearing noise from outside, they are two very different things.

The Cardiff branch supplied for a Swansea job of mine, and the prices were staggeringly expensive. Spoilt second wife half the age of rich client said that's what she wanted, so off he went with his cheque-book like a good little boy. Total waste of money, just don't be lazy and shop around for the same products by name and you'll save thousands. @Taff Ask your other half if she likes setting fire to money, as that is what you will be doing, plain and simple. A well thought out and neatly installed room will look the same, regardless of what you spent on the items. I have many champagne jobs in my library achieved with lemonade money, and they still look a million bucks .

AFTER he makes it first

Point being, fit the right amount of PV if you’re not getting paid to spill over back to the grid. Agree on the uplift, but MCS is more than just getting paid, it’s insurance and diligence also, eg to ensure the array will perform admirably vs the effort / cost to install it

+1, as you’ll be on their insurance then also.

IIRC, no MCS certificate means zero export payments. You’d be better off with a smaller array and self-consuming all you generate if you go ‘DIY’. 8kWp may be pointless unless you can store all excess on site; eg big cylinder.

Dry capacitors instead of wet, and a 12 year warranty.

An example here https://www.smallsolar.co.uk/installed-systems/

Reading your posts @PeterW and @Onoff, I found myself nodding in agreement at every point.

@jamiehamy has a 500L Telford with 4x 3kW immersions IIRC.

What about making T1 a thermal store? Take the UFH off it too so heating buffer plus DHW pre-heat via the DHW coil?

8 showers all at the same time / staggered / 4 in the morning and 4 in the evening?? INPUT!!!!!

Look on the bright side, by that time we can get there on the bus for free!!

lol.. Don't be daft and put a small UVC in now. It would cost a hell of a lot more to retrofit another cylinder, and to jump up a few sizes now is cheap enough. Be a cheapskate all you want, but don't be stupid Give Trevor @ cylinders2go a shout and mention the forum. He'll look after you. Lots on here have bought from him.

That would make more sense tbh. Another great example of not being a penis and saving the wrong few quid in the wrong place. If the insurers ever found out that, he'd get the bill. Best we shut up.

Who’s paying 12p/kWh for export ?