On an outer wall, if you install overlapping outer paneling (vertically, under board/over board), is a ventilation gap needed?
Framing 60 cc with 200 mm insulation > wind paper > 28 mm boards overlapping. If each under board is placed with about 10 cm interval, you do get a ventilation gap at every other board, right!?
Do I really need to build out with horizontal sparse paneling 28 mm 60 cc outside the paper and then overlapping boards? Seems like unnecessary work...
Framing 60 cc with 200 mm insulation > wind paper > 28 mm boards overlapping. If each under board is placed with about 10 cm interval, you do get a ventilation gap at every other board, right!?
Do I really need to build out with horizontal sparse paneling 28 mm 60 cc outside the paper and then overlapping boards? Seems like unnecessary work...
Do you have horizontal studs? The horizontal 28x70 is for nailing the panel otherwise.
The entire outer wall is constructed with vertical studs 60 cc (vertical) + horizontal studs 120 cc (horizontal) in between. Sure, everyone says you should have an air gap, and I understand this if the paneling is tight like tongue and groove, but in my case, I'm overlapping the planks, creating an automatic air gap of about 10 cm between each underlying plank. Thanks for the response...
At the outermost layer, you have wind barrier paper, nail a 10x45 batten on top of the laying 45x120 and you'll be fine. The batten also holds the paper better than staples, in case you don't get the panel up the same day. The batten makes it easier to see where to nail the panel.
radman,
see it this way as well:
If the bottom plank is directly against the wind barrier, a narrow gap is created between them,
which retains any incoming water with capillary action.
It will not dry out completely, but rather becomes a breeding ground for mold.
Warm inside the panel when the sun is shining, and humid on about half of the facade surface.
Make sure you have a proper air gap! The cost is negligible.
//KoW
see it this way as well:
If the bottom plank is directly against the wind barrier, a narrow gap is created between them,
which retains any incoming water with capillary action.
It will not dry out completely, but rather becomes a breeding ground for mold.
Warm inside the panel when the sun is shining, and humid on about half of the facade surface.
Make sure you have a proper air gap! The cost is negligible.
//KoW
Is there any construction guide available online regarding air gap (external wall with wooden panels) for horizontal and vertical panels? Many build completely without air gap both below and above on the outer wall. They seal the entire wall with battens, no insect mesh or air gap. Around windows, there should be an air gap above if you want to do it correctly, right?
Thanks
Thanks