passivhybrid

Can I ask what 10mm thermal break you used to the lower chord please any pictures of the build up? thankd

if you still have a chance look at energy heel trusses https://www.norbord.com/na/blog/raising-the-roof-raised-heel-trusses/ raised heel truss

Solar iboost

Looks good Has anbody used n roof system with standing seam zinc roof?

thanks breather membrane is fom Dorken Delta Maxx Plus basc specs in screen grab below

Just trying to figure out what products are breathable and which are not. Came across the vapour diffusion resistance factor when looking at the properies of a straw based board.It shows 10/10 for a istraw board and 2/5 for a woodwool board( like celenit) Another thing is that When i introduce a breather membrane on top of the insulation ( roof with counter batens ) i get condensation,if i don't put breather membrane into build up no condensation

yes its first floor I actually managed to route all the HRV ducts and first fix electrics within the 3 stiffening sections ( thinner blocks)and through the hollow slots in the blocks. Used steel fibres in the concrete and increased depth of concrete by 50mm . Prior to concrete pour I also drilled 100mm cores at each corner in building and in centre to facilitate plumber and electrician.

is it a warm roof? would you mind posting build up of your roof?

Im not in the UK My engineer is German and is quite familar with clay blocks and this system

Thanks for replying and my Apologies for any confusion.The clay block and beam system is on the first floor i used it instead of a precast floor slabs at this level. the ground floor has u value below 0.10 it is the passive kore slab. in attached screen grab of ground floor i have averaged out the concrete because of deep ringbeam on perimeter of foundation plus horizontal and vertical ring beam inside slab

https://www.blowerproof.co.uk/wp-content/uploads/2017/12/Blowerproof_Variable_Moisture_Control_Vapour_Control_Layer_VCL_Capacity.pdf

clay block walls are already constructed we are at wall plate level now i did consider conventional blocks but the breathability of the poroton block coupled with the heat storage capacity was why we went with it. we havent made a firm decision on the EWI as of yet will be next year before we need to make that decision, i have actually considered just pouring an external ringbeam around the perimeter of the Kore Passive Slab and just putting another skin of poroton up and blowing in cellulose in the newly created cavity, no fixings to worry about and simply lime render it job done 100% breathable. Finances as ever will dictate that dcision at the moment it looks like i will have 10 pallets of the blocks left.

maybe i misunderstood it........ by external radiator do you mean placing it outside the building?

yes its a breathable wall airtightness is with a parge coat and in critical junctions blowerproof liquid ( which is also breathable) rockwool to be attached with adhesive and insulation fixings

screen grab of manufacturers specs I am not aiming to go the certification route for a passive house just following their criteria and using passive certified products for all the main purchases.