Tensioning the wind barrier over the roof trusses with 45x45 on top. Is my solution bad?

[Klicka]

Thinking about building a "friggebod."

Got a tip to put a wind barrier on the rafters and then a batten on top of them.

How do you think this looks? I've drawn in a 45x45 batten on the rafters (45x170).





Could one reduce the rafters to 45x120 since I will be nailing a 45x45 on top of them?

How far out can you go with the 45x45 at the ridge and eaves (the overhang, that is)? Feels like it might be too weak with 45x45?

It would be easier to wrap everything in a wind barrier if I did it this way (that is, the rafters themselves would not stick out). Just fold down the wind barrier from the roof directly onto the wall.

 

[KnockOnWood]

Is a wind barrier at all the right product to have as condensation protection in the roof?

 

[Mikael_L]

I agree with KoW that you're probably supposed to use a different product. "All" the brands have fabric for free-hanging installation, for example:
http://www.icopal.se/~/media/Icopal...pal_broschyr_underlagsprodukter_feb14_low.pdf

Could one reduce the rafters to 45x120 since I will be nailing 45x45 on top of them?

If you can manage with only 45x120, then it will work. Otherwise, it is doubtful whether you can benefit from any increased strength of an attached 45x45 with a sliding surface in between.

How far out can you go with 45x45 at the ridge and eaves (meaning the overhang)? Feels like it might be flimsy with 45x45?

Yes, it feels flimsy. You can probably go out one decimeter.

 

[KnockOnWood]

Why not extend the "real" rafters and cut them at an angle a bit?

Like this roughly:

 

[Klicka]

Why not extend further with the "real" rafters and cut them at an angle?

Like this:
[image]

That's what I thought at first but without the 45x45 on. I'll have to think about it a bit.