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MN Renovator · 03-14-12, 10:55 AM

So it's basically a normal foam core door with another surface for a second seal?

If the normal seal doesn't fail, then having a second seal doesn't seem to be much of an advantage. My front door has a U-value of 0.12. 0.12 is an R-value of 8.33. If you want a piece of glass in your door that will go down dramatically. If we wanted higher R-value, I'd have to say that we might need a thicker door. Either that or you could add a storm door to the outside that seals well and has some insulating value as some efficient options do exist. This would probably be a better bet than the passivehouse door on its own and likely much cheaper.

03-14-12, 10:55 AM	#30
MN Renovator Less usage=Cheaper bills Join Date: Nov 2010 Location: Minneapolis, MN Posts: 939 Thanks: 41 Thanked 116 Times in 90 Posts	So it's basically a normal foam core door with another surface for a second seal? If the normal seal doesn't fail, then having a second seal doesn't seem to be much of an advantage. My front door has a U-value of 0.12. 0.12 is an R-value of 8.33. If you want a piece of glass in your door that will go down dramatically. If we wanted higher R-value, I'd have to say that we might need a thicker door. Either that or you could add a storm door to the outside that seals well and has some insulating value as some efficient options do exist. This would probably be a better bet than the passivehouse door on its own and likely much cheaper.