50mm board

[User___removed]

is there a board out there that gives the same u-value as 90mm eps?
I'm sure I read somewhere there is a 50mm phenolic board thats gives you the same as the 90

Cheers

 

[Dansouthcoast84]

Yeah there is but some manufacturers dont warrant them

 

[User___removed]

Tell me more dan!!

 

[Dansouthcoast84]

What ya wanna know.

Just ask your system

Or.mr Jfe @plasterjfe will have the answers to all your lifes queations

 

[plasterjfe]

Used to be 50mm phenolic until about 2011 ish then it jumped to 60mm to give slightly better u values. I think the regs changed from .35 to .32 some time.

Phenolic is the way to go if u want the same value but less thickness.

 

[plasterjfe]

On the warranty side phenolic isn't a stable board it can deform after production and it can also breakdown and lose a tiny bit of value. A handful of manufacturers won't touch it after some bad experiences bit most can supply and will if eps can't be used

 

[owls]

phenolic at 70mm gives a u value of the same as 90mm eps if not a tad better, building regs are 0.30

 

[plasterjfe]

phenolic at 70mm gives a u value of the same as 90mm eps if not a tad better, building regs are 0.30

They will prob squeeze the regs for new build again in the future before we know it passivehaus will be the standard

 

[Rigsby]

Get your suppliers backing for warranty. I won't touch it if I can.

Those near me that I have seen done with phenolic look like igloos in the sun.

 

[owls]

Very pricy aswell is kool therm.