The subject has been discussed before without reaching any really good conclusions. Perhaps there is an opportunity now.
The whole thing is about having a heated space under a deck without needing to build a complicated structure to insulate the deck joists. The difficulty lies in both achieving a watertight roof with drainage AND being able to insulate without the building height exceeding the original joist thickness (195-220mm).
I believe that this can be done well with the product mentioned in the following thread:
http://www.byggahus.se/forum/altan-uteplats/65057-til-tak-erfarenhet-nagon.html
The product is intended to be used in constructions where the temperature is the same on both sides of the sheet metal, but it should be possible to build a ventilated construction where insulation can still be used underneath.
What do you think about a construction where, from the top down, you have
sheet metal
air gap with good ventilation
masonite?
insulation approx. 170mm
age-resistant plastic
ceiling.
The risk is, of course, that air condenses on the underside of the sheet metal, but this should be manageable with good ventilation? It's like having a regular sheet metal roof really.
What do the forum's constructors say?
The whole thing is about having a heated space under a deck without needing to build a complicated structure to insulate the deck joists. The difficulty lies in both achieving a watertight roof with drainage AND being able to insulate without the building height exceeding the original joist thickness (195-220mm).
I believe that this can be done well with the product mentioned in the following thread:
http://www.byggahus.se/forum/altan-uteplats/65057-til-tak-erfarenhet-nagon.html
The product is intended to be used in constructions where the temperature is the same on both sides of the sheet metal, but it should be possible to build a ventilated construction where insulation can still be used underneath.
What do you think about a construction where, from the top down, you have
sheet metal
air gap with good ventilation
masonite?
insulation approx. 170mm
age-resistant plastic
ceiling.
The risk is, of course, that air condenses on the underside of the sheet metal, but this should be manageable with good ventilation? It's like having a regular sheet metal roof really.
What do the forum's constructors say?