Dave Jones

planning for worst case, reality should be half of spec mostly. dhw free for summer and most of shoulder months (10kw solar) cheap rate in winter. will have a read of link thanks.

nah they have the metal ones in a frame.

all the builders merchies stock them.

chiller unit is a cooler yes not a heater. Your right they wont cool enough on their own hence using the fancoils as well as the ufh to provide cooling.

yes, a length of 4x2 on floor and another on the roof, you may need noggins in between the rafters to take it.

heat pump - not decided yet but it will have to support cooling out of the box. Wont be MCS scam install either. control/flow/valves will leave to the plumber. Your missing a trick on solar. It's cheap and has immediate payback. 75mm cavity (0.6 is a typo I would guess?) may just scrape past regs but its very very poor U value even using expensive insulation. Insulated plasterboard as well unless you can make the cav wider. for showers im allowing 5 simultaneous @ 19L/min and the washing machine, dishwasher etc. basically worst case. accumulator to maintain flow and starting of with 2 x 300L with space for 2 more. see how we get on. I'll keep adding them until running out of hot isn't an issue. Poverty mode for hot water isnt an option.

not using a post heater no sure where you got that idea. fancoils for 1st floor supplementary heating/cooling if required. a 300L tank is nowhere near enough for 5 showers @ 18/l thats 1350L even diluting with cold. Also plan for pressure unless you will only shower 1 at a time, not have the washing machine, dish washer, sink etc as well. yes to wwhrs, using the column. not factoring it into usage though it will just be an energy bonus.

ASHP supplies cold feed to the MVHR. No way a 300L cylinder would be enough for us without rationing which isnt an option. Planning for double/treble that.

maybe, its attic trusses you want.

im doing pretty much same as you, albeit its new build. Im adding a chiller unit to the MVHR and provision to reverse the ASHP to chill the slab and provide a cold feed to the fan coils. Are you maxing out solar ? You sure a single cylinder is enough hot water for a 5 bed ? Our family of 5 need a min of 2 of the large ones and im leaving room to add more in case they needed. What U values for walls, floor and roof are you designing for ?

they do look very good, im going to use a very similar one for a path. I'm considering using flowpoint to grout them as they have some nice colours.

couple systems if you have a search, you will still have a large area of cold bridging from the beams but it will still be miles better. 50mm celtox over the top / 50mm screed.

3 guesses if the morons in the council decide. It's a homes tax nothing more that the buyer has to pay. Like all taxes immoral.

be easier putting in some velux i would say

always annoying when the build up below damp isnt designed properly. You will struggle to pass building regs even with 100mm of celotex. can you lose ceiling height ? I think your best option is to remove the blocks and replace with insulated ones.

guessing steel is 225mm then there is wallplate 90mm ?

65mm will almost certainly be a fail as well even for the lower spec refurb target. 100mm beads is a fail on new build,

cutwrights offer a very fast service, they will cut them all to width and length. just need to router the returns. https://www.cutwrights.com/

as long as they are a min of 150 below your dpc and sloping away from the building you can butt them up

they lock pants though in brickwork!

bit weird shower in a downstairs loo ? Why dont you get rid of it and put a bog in its place then you can have a separate ensuite for the bedroom, lose the cupboard for a shower.

Truss supplier has been very good to be fair, 2 replacements coming Monday. the splits were not evident when we unloaded them a week ago and it has been really sunny since ….

correct, try passing sap without them.

its same in england, there is such little awareness of the new regulations amongst the trades and even the merchants. Was in Jewsons and asked when they would be stocking the thermally broken lintels as their shelfs full of the standard catnics can no longer be used. They asked what a thermally broken lintel is. I made sure at quote stage, in writing, the standard I'm expecting. For example Photo's of all the main thermal junctions have to be sent to the EPC assessor or you wont get an EPC cert on completion.

i wouldn't necessarily expect just a bucket of water to run that far, 1:40 fall is very slight and textured slabs do hold onto water. When it rains it should not collect at the 'top' of the fall. photo and spirit level to check it.