Caroline

Thank you all. I asked an insulation company today and they suggested: "To achieve the same thermal performance you would need 90mm cavity and a 160mm floor, Celotex can provide you with 85mm or 100mm cavity 150mm or 165mm floor" This would be far cheaper for us and they are saying would achieve the same thermal performance as the Kingspan. I guess we might need to make cavity slightly bigger to keep the same void as currently on the plans.

75mm of insulation in the cavity with a 50mm clear cavity between brick and block.

Woolbatts/Pumped beads, not heard of these. Can you recommend a manufacturer and who could install. Thank you

What would you recommend in place of PIR boards? Also, what to insulation floor with?

Hi everyone Our building control drawings are showing the above insulation for our newbuild. The price of this Kooltherm is really high, however, all comparables seem to be coming out at 0.022 W/mK, so slightly less efficient. Does anyone know of any alternatives which produce 0.019 W/mk or any advice if current building regs require this. All advice gratefully received.

Thank you everyone

Hello We are building a bungalow 200sqm traditional brick/block. Our guy has suggested a 7KW Stiebel-Eltron WPL-A Premium ASHP, 13kw PV array and Solaredge battery. Heat loss calcs coming out at 4741 w power and 16365 kw energy. I queried the size of ASHP wondering if it is powerful enough. Also I believe the PVs are made in China, does anyone have any they could recommend made in UK or europe? Battery, Solaredge, any advice, are they any good. All of this with the UFH is coming out at £44.5k excluding the BUS grant. Any advice would be appreciated. Thank you.

We are in the South East. We want to go to someone who will supply and fit.

I have heard good things about Greencoat but it is the same price as alumin and not much less than zinc.

Wow, a bargain. We have approx 320sqm and have been quoted £54k for Alum/Greencoat and £2.5k more for Zinc, this does include guttering and downpipe in same material. There are no veluxes in the roof the only opening is for log burner flue and the roof is similar to yours oblong 28m x 10m with an apex on one side. Does your installer work nationwide in the UK?

Looks great. We are in the South East, did you go for this material due to being in Scotland, harsher weather. Would be interested to know why you chose this material please?

Hi all I am going to have a seamed roof, thinking of Alum/Greencoat or Zinc, not much difference in price, zinc (around 5% more expensive than the other two). Any advice would be appreciated. Thank you

Good evening. We are soon to start our bungalow build. The design has a apex window feature. I wondered if anyone can recommend a company to go to for supply and design of roof trusses and would they include the apex in the truss design? See below an image of the roof externally. It is simple, will be steel or zinc covered seamed roof. Thank you all in advance. You are so helpful on this forum.

Yes they are shallower, going from 2.2m to 1.5m then to 1m. They were removed around a year ago, this is from the report: There are a number of trees along the southern side of the barn which whilst not very large do have an effect on the foundation depth required. For example the Wych Elms (assuming they are removed*) require a foundation depth of 2.2m there is an oak tree to on the opposite side of the track this requires a foundation depth of 1.75m. *as a tree grows it removes moisture from the soil as it does so it shrinks, when a tree is removed the soil will expand as it returns to its natural moisture content. Both Wych Elms and Oak have high water demand so have a significant impact on foundation depth.

Thank you everyone. Your comments are invaluable and I suppose I was just doubting myself. We live on site and will be managing the sub-contractors on a day to day basis, so will take on role of Principal Contractor, or not as we are self builders. Building control has been passed and ironically our building control officer (private company) is the same person who did our BC on our last project. We had our structural engineer's drawings double checked by a second SE as we had queries on original, there is underpinning to existing steels involved and very deep 2.2m foundations on one part due to trees that were removed 15m away! Anyway, wish us luck and hoping to be done in 12 months