Does the differential lock serve any function?

[JerkaV]

Planning to convert part of an uninsulated attic space into a warm walk-in closet. I expect to install wall gypsum + about 200 mm insulation + "windboard" + air gap against the sloped outer roof. Does a vapor barrier serve any function in this type of renovation, or can it just as well be skipped?

It's an old wooden house from around 1920 with a chimney that is still warm, cellulose insulation in the attic, and otherwise no vapor barrier in either the walls or the roof.

Thanks in advance for wise answers and considerations about advantages and disadvantages.

 

[bonnier]

Do you have no barrier on the rest of the attic you might as well skip the barrier in the closet too, perhaps also use wood chips or similar cellulose insulation there as well. Some also say you can use building paper instead of plastic. Is the rest of the attic heated?

 

[JerkaV]

Thank you for your response. No, it is an unheated attic otherwise.

/Erik

 

[Saxpy]

I am planning to convert part of an uninsulated attic space into a warm walk-in closet. I expect to add wall gypsum + about 200 mm insulation + "wind board" + air gap against the sloped outer roof. Does a vapor barrier serve any function in this type of renovation, or can it be skipped just as easily?

It is an old wooden house from around 1920 with a chimney that is still warm, wood chip insulation in the attic, and lacks a vapor barrier in both walls and roof.

Thanks in advance for wise answers and considerations about advantages and disadvantages.

I'm actually going to do the same thing, but I have a question... Do you have air coming up through the eaves and up to the attic today? If not, what function does the air gap serve if it is not ventilated?