ᐅ Substructure for facade with rhombus-shaped cladding boards without insulation

Created on: 22 May 2020 09:26
A
abc12345
Hello everyone,

To visually enhance the entrance area, we would like to install rhombus cladding on the facade. The area measures 5 meters (16.4 feet) in length and 3 meters (9.8 feet) in height.
I have already ordered the rhombus cladding boards (untreated Siberian larch). I plan to apply a clear wood stain.
The wood will be installed on the north side of the facade, so it is not exposed to direct sunlight. Only a bit of morning sun reaches it early in the day.

The facade is already plastered and painted, with the staircase located behind it.
I want to skip insulation since this is purely for decorative purposes.

Now my question is how I should build the substructure.
My plan was simply to screw a timber batten onto the facade, then staple a black vapor-permeable underlay membrane over it, seal the overlaps with appropriate tape, and finally screw the rhombus profiles onto that.
Is this approach feasible?

What minimum thickness should the substructure have? I think a 40 x 60 mm (1.6 x 2.4 inches) spruce timber batten might be oversized, right?
Would a simple roof batten of 24 x 48 mm (1.0 x 1.9 inches) be sufficient?
B
Brainstorming
24 May 2020 20:09
We are getting something similar as well. However, we have a thinner brick (17.5cm (7 inches) instead of 36.5cm (14 inches)) at this spot. According to the architect’s drawing, a 14cm (5.5 inches) insulation layer is to be applied to the masonry, followed by a membrane, then an air gap of 4cm (1.5 inches), and finally the wooden cladding.
Maybe this information helps you in your case.
A
abc12345
25 May 2020 06:02
Thank you for the responses. I will indeed go for 24x48mm (1x2 inch) battens. Air can flow through, so there shouldn’t be any issues with mold or moisture behind them.
Thanks for your input.
J
joshia01
25 May 2020 18:25
Hello abc12345,

thank you for your inspiration. I just asked here as well and had overlooked your post.
I also want to clad a house wall with rhombus battens. However, my facade is damaged and therefore no longer protected from rain without sustaining further damage.

I was planning to staple the membrane directly to the house wall. It is breathable after all.
For the counter battens, I thought about cutting strips from the membrane and attaching them to the battens so they would be black.

Are you sure about installing the membrane on the counter battens? I haven't found any information on that yet.
I am not adding any additional insulation either.
L
Lumpi_LE
25 May 2020 19:08
It's a pity that you have already ordered the profiles. There is a version with a tongue and groove joint and shadow gap, which looks much better.
Do not stain the larch wood; oil it instead.
J
joshia01
25 May 2020 19:14
Hello Lumpi,

The profiles with shadow gaps are also significantly more expensive. I found two suppliers for these and have them in mind. But as I said, they are costly. I find the price excessive. Using film and regular trims is cheaper. It is also a question how durable the black shadow gap is against weather conditions.
G
guckuck2
25 May 2020 19:19
Lumpi_LE schrieb:

It's a pity that you already ordered the profiles; there is a tongue-and-groove option with a shadow gap, which looks much better.
Use larch wood and oil it instead of staining.

These are basically two completely different styles. It's a matter of personal preference.