T
TheBoy
Guest
Hi all.
This is my 1st post but I have been following certain threads now for a while. I am building a new house & have been considering how to go about it. After considering timber frame & icf I have decided to go with a block cavity wall but to try and do it as best as I can.
Again I have considered putting insulation boards on the inside & have ruled out external insulation as I have heard it is very expensive. Quinnlite blocks have been considered but are again expensive & are hard to work with re plaster etc & have ruled out poroton as I don't know much about them.
Therefore I am thinking of 100mm Alphatherm blocks on the inner leaf, a 150mm cavity with platinum ecobead- I would prefer not to use Kingspan etc due possible thermal looping. I have also sourced wall ties in England that apparently conduct heat 20x less than stainless steel ties & are about the same price & they will ship for free.
I worked out a U value but don't know if I have done it right. Please see what you think. Please let me know if there are any major flaws & any other things I need to consider to improve.
Layer & Resistance (m2K/W)
Ext surface 0.040
Ext render 0.038
Dense conc block 0.074
Platinum ecobead 4.545
Alphatherm lightweight
block (Acheson&Glover) 0.256
Int render (gypsum,sand) 0.023
Plaster skim 0.017
Int surface 0.130
TOTAL 5.123
U value = 0.195?
This is my 1st post but I have been following certain threads now for a while. I am building a new house & have been considering how to go about it. After considering timber frame & icf I have decided to go with a block cavity wall but to try and do it as best as I can.
Again I have considered putting insulation boards on the inside & have ruled out external insulation as I have heard it is very expensive. Quinnlite blocks have been considered but are again expensive & are hard to work with re plaster etc & have ruled out poroton as I don't know much about them.
Therefore I am thinking of 100mm Alphatherm blocks on the inner leaf, a 150mm cavity with platinum ecobead- I would prefer not to use Kingspan etc due possible thermal looping. I have also sourced wall ties in England that apparently conduct heat 20x less than stainless steel ties & are about the same price & they will ship for free.
I worked out a U value but don't know if I have done it right. Please see what you think. Please let me know if there are any major flaws & any other things I need to consider to improve.
Layer & Resistance (m2K/W)
Ext surface 0.040
Ext render 0.038
Dense conc block 0.074
Platinum ecobead 4.545
Alphatherm lightweight
block (Acheson&Glover) 0.256
Int render (gypsum,sand) 0.023
Plaster skim 0.017
Int surface 0.130
TOTAL 5.123
U value = 0.195?