willbish

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About willbish

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  1. willbish

    Slab edge thickening

    I don't have the luxury of employing two engineers. I'm working with a recommendation direct from Isoquick so should be getting the most appropriate design.
  2. willbish

    Slab edge thickening

    Agreed, will raise this point this morning. Isoquick uses the same grade of insulation throughout
  3. willbish

    Slab edge thickening

    @PeterStarck that would be very helpful thank you. What you've described is exactly what I want/think is appropriate
  4. willbish

    Slab edge thickening

    Thanks @JSHarris your figures and dimensions are much more in the region of what I was expecting. I'm not too fussed about the 250mm slab thickness over non loading bearing areas, it is the common design with Isoquick. My understanding of the Isoquick system was the thicker 250mm slab throughout would compensate the need for a ring beam/ edge thickening therefore allowing 300mm insulation throughout. I have already asked the SE if anything could be done to reduce the slab thickening, his reply was no. I asked him what ground bearing he would need to scrap the slab thickening. His response 'somewhere in the region of 100kN/m2' Hence returning to the ground investigation chap. Just to add to the pressure, I've being told if I don’t approve the draft plans on Monday the SE will not be able to finalise next week before going on holiday for two weeks! @PeterW Yes to UFH. The SE has specified thickened strips as well much like @jack so the thickened area is now 25% of total slab area
  5. willbish

    Slab edge thickening

    For those with an insulated raft foundation, what was your ground bearing capacity figure? And was your raft designed with extra thickening? My SE had made noises that my ground bearing figure of 50kN/M2 is a bit low but workable. His latest design of the raft has 25% of the area thickened to 400mm and in these areas insulation reduced from 300mm to 150mm. This feels like a big step down in thermal performance to me, but perhaps I shouldn't be so concerned. During the ground investigation I was told that I had ideal ground for a raft so not sure how a 50kN/M2 figure has been derived. I've asked the GI chap if he could revisit his Standard Penetration test results with hope to increasing the ground bearing figure; no response yet. I also feel the SE is being over cautious; he has the slab edge thickened where a single story porch will be. That seems really unnecessary.
  6. willbish

    Do I need to plaster my new build

    Have you had a go at Tadelakt? I like that Moroccan look for bathrooms but wonder how water repellent it really is. Again too expensive I reckon
  7. willbish

    Do I need to plaster my new build

    You could consider a clay plaster to save on the decorating... I just had a quote from Clay Works, 226m2 material only £9063 😵
  8. I would be very interested to follow your progress, please keep us updated. I as alluding to Brine heat exchanger like @Barney12 has installed. Geothermal i think is an incorrect term. Has anyone got something like this plumbed into their ASHP and MVHR unit and using it for cooling? Would the effects be that noticeable?
  9. This is interesting, @JSHarris could you elaborate a bit more please? I liked the idea of a brine geothermal heat exchanger for the MVHR but struggled to justify the additional cost. The idea of a duct cooler seems simpler and cheaper, would your ASHP be able to keep up with MVHR flow rates to provide the 12°C input air you mention?
  10. Has anyone adhered to the Part M requirements for their outside sockets? Could a jobs worth BC inspector argue that a patio area is deemed to be a habitable room?!
  11. willbish

    Sunamp heat battery

    That's what I've opted for, seems sensible to have the redundancy if the heat pump goes bang in mid winter
  12. willbish

    Sunamp heat battery

    Because an ASHP could charge your PCM34 (DHW preheat) with 3/4 times less electricity than using the grid when the sun aint shining.
  13. willbish

    Sunamp heat battery

    A DC array or a mixture of AC fortified with DC is something I am exploring and would like this option to be kept open for my SA units. Very keen to hear more info when it's available. Cheers
  14. willbish

    Sunamp heat battery

    No probs at all. I understand Sunamp are going through a busy period, and long may it continue. I've got a quick question regarding electric immersions, as @Nickfromwales mentioned earlier 3kW immersion is actually 3x 1kW. If I want to power my Sunamp with DC solar PV should I request one or perhaps two of those immersions to be DC compatible? Thanks
  15. willbish

    Sunamp heat battery

    @AndyT I appreciate you taking the time to answer questions on the forum but please would you be so kind as to confirm receipt of my order and money which I sent to you last week. I made my order on the 27/06 and electronic transfer of over £5k. Since then I have sent two emails both unanswered. I spoke to you on the phone today just before lunch. You said you'd be right back to me. I have at times since last Wednesday wondered whether I have been the victim of a hoax. Or at best wondering what the post sales service will be like... I'm only asking for a simple confirmation that money has been received, perhaps a small thank you. Really didn't want to post publicly but don't want to wake up for another morning wondering if there's a small possibility I might've been scammed!