PeterW

Nope ... go to Toolstation and get their wood filler in the small tubs. Great stuff, easy to sand and doesn’t show through paint.

How is the steel holding up a ridge as it’s flush with the floor ..? Keystone 3600 will be close to £650 I expect which is much more than a steel of the same spec although .... I am not sure the calcs are correct !! Without seeing all the loads, I can’t see how a single 152x89 is taking the floor load, upper wall and the point load of a ridge ..? I know I’ve not had a lot of coffee today but I’m getting about a 52mm deflection at the point load ..!! @Gus Potter does that sound like a very skinny beam to you for an opening that size ..?

Would be running 3 or 4 open packs (but keep them covered and dry) and mix as you go. Could give Ibstock a quick call to see how many variations they expect in a pack and validate the packing labels.

I use Easysand as it’s just a wipe on and wipe off job then.

where are you..? I’ve got a contact in Nottinghamshire who is good

So if it’s like the UFH and bathroom, it will be turned out tomorrow, a photo posted of it and then nothing..... then you’ll see them installed in 2024 using a scratch built hoist that uses the rear axle of a Capri along with some “spare” RSJ and powered by an 18v battery drill ... ?

Did you use rapid..?? And how “sharp” do you want the edges ..? I usually knock out after 24 hours and clean up any edges while soft and then leave them to sit on a pallet to dry and cure properly.

Steel edging is commonplace - lots of NT places use it. you can buy it pre-made but recon your dad could do something with some short lengths of rebar and the welder ..! Everedge are only up the road from you too. https://www.everedge.co.uk/product/classic/

Did you properly vibrate it ..??

Just put up a couple of of “HS2 Construction In Progress” signs and then sit back and listen ..! ?

Standing losses are negligible difference - the key one is Telford as standard will put all the connections where you want them. OSO is a standard product and you have to make it fit. @Nickfromwales will probably agree but when you want to run say cold supply >> tank >> manifold from left to right then you want the connections located differently to when the tank is in a corner. Same with immersion location and direction. Single immersion vs dual for diversion is questionable as you need a lot of diverted power to make a single take a tank up to 75°C and a dual allows you to do that in 2 steps for £50 which also allows you to boost just the top if you need to - very useful on a large tank.

better to use a dual immersion and dual control immersion diverter to get stratification in the tank. Heat the top to 75°C on the primary divert load immersion then drop to the secondary so you significantly increase the available water when blended down With a large PV install, a 500 litre UVC is the way to go - certainly provide the bulk of any hot water needs in the summer.

If it’s only the bottom courses then bluebirds in every joint will be fine or at worst a starter track that is what @Russell griffiths suggests. These are certified for it to 3 storey from memory also.

Ask for the proof - where did they actually test this as they can’t use the hydrant to do it. The upside is that it is a decent flow and pressure, and if they can mole a replacement then that’s good. See if they will do 32mm for a price. The only downside is if it serves 3 more properties then who is paying for their connections ..??

I would check if the replacement you want would be acceptable under Permitted Development as it gives you a basis for a knock down and rebuild argument with the planners. What else has been done in the area ..? Conservation area..? Street full of bungalows and you want to build 3 storey.? And the architect / BRegs / asbestos stuff is wildly out - you should be able to halve that.

CoP will only be that low if you’re trying to push the ASHP up to gas rad temperatures. A 10kW ASHP is pretty small, single phase ones go up to 16kW and usually run a max 32A breaker so you’re well within the usage boundaries. Some new R32 gas ASHP can get up to 67°C plus but CoP does suffer. Samsung make a 12kW and 16kW ASHP for change of £3,500, installation isn’t complex

Ask him how he calculated it ...

At least twice the price of a similar standard UVC, nothing like a combi boiler as it only produces hot water at 58°C until it is exhausted and I real idea of the state of the unit in terms of charge. So does a pair of immersions for a lot less money. Why not have a very simple setup and a pair of cylinders ..? A pair of 300 UVC will take up the same floor space as a Sunamp and a UVC. Telford will also custom make any size you want too, so if you want it tall and slim they will do that too.

just to add to this, rough sizing is here I would be going for tandem 300 litre tanks with a switch over valve to take it from 300 to 600 capacity assuming you have the space and appropriate heat source

Limitation here will be flow and pressure not just stored water. No point having 600 litres of hot water if your showers are a bare dribble ...

So given you need to do all this, why not use MVHR and get all the benefits ..??

That isn’t correct - BC may still require them and you need some method for the air to exit. Other issue will be your airtightness test and you will get a poor SAP score due to ventilation loss as if you don’t make the house “leaky” your PIV won’t push airflow through the property. I also think you still need bathroom extract and other wet room extract to meet building regs.

But you can’t compare MVHR to PIV..? At 60 litres/sec, the PIV will need to be moving air at 3.5m/s through the air input. That’s going to be a pretty fierce flow. Also, if it is in the attic it will be dragging a lot of air into the attic space, something like replacing the entire airspace of a standard house in around 30 minutes. That has to come from outside, so you will rapidly increase the moisture levels in the attic on a damp day. Also, I can’t find the pressure values for those PIV fans - how do they create enough positive pressure to force air out through trickle vents etc ..?

He always lets customers in.... like his walk on glazing that lets water in.... They are huge - and expensive as you’ve found out. I would I consider 4 at 1x1 which is pretty much a standard size and much easier to handle.

So you will need trickle vents then - AQ is uncontrollable at that point.