Arden Passive House Series - Episode 2 - Wall System

[@matthewgaudon1706]

Hats off from one quality homebuilder to another!

[@raduteodorpetrica2344]

Was just wondering, from a fire resistance point of view, would it have been safer let's say, to use rockwool instead of wood fiber boards on the exterior? What do you reckon? Great vids and thanks for all the info!

[@fab_structures]

Hey! good question. Research shows the benefits coming from wood fiber board as a fire retardent which we believe is higher than for rockwool check out some of this reasearch bioresources.cnr.ncsu.edu/resources/combustibility-and-characteristics-of-wood-fiber-insulation-boards-prepared-with-four-different-adhesives/ Also Timber HP has a lot of info on WFB fire this check them out here: kzbin.info/www/bejne/Z2XYZoCkgM-Sppo

[@G4825]

Really enjoy the production quality and assembly details. How do you run at least some electrical on the outside walls assuming the majority of MEP would be run through standard stick frame internal walls?

[@fab_structures]

Thanks! We'll be doing a video just on those specifics but for now yes majority would be through interior walls. However, when needed on the outside walls, the electrical chase-ways are CNCed in the manufacturing stage.

[@chrishughes997]

Just a quick question, how is the first layer of vertical battens attached, im assuming your using some type of lag screw going all the way through the insulation and into the lvl ? For structural load !

[@fab_structures]

Yup you're right there is an engineering pattern of screws through the Wood Fiber Board insulation into the CLT !

[@everettk333]

@@fab_structures Amazing wall! do you worry about thermal bridging through those rain screen screws into the CLT?

[@fab_structures]

@@everettk333 Thank you! In our experience no matter what you do there there will always be a weak point in the wall system and if an 8 mm screw is the weakest point we’re pretty happy with that :)

[@kjterz]

what is the r value of the insulation

[@fab_structures]

it's 2.64 per inch of WFB

[@RammaJamma3]

Dang that’s not good at all rockwool is 4.2 per inch

[@CharlieH_design]

Could you explain the advantage of using the CLT vs a framed wall? It seems like you are using a lot more wood since it is a solid panel compared to 2x at 24" O.C. It is like comparing a beam to a truss. Like the design!

[@fab_structures]

Yea that’s one way to look at it. Other advantages are sound, fire, it being an interior finish, more carbon sequestration in building, sismique strength. But the technology is more used in the commercial field to compete against concrete and steel. Thanks for your question !

[@tatsianapalchekh5326]

Frame houses are considered "paper houses" by many ppl and can't compete with brick (ceramic block, Ytong, etc) so the, point in clt is that u have real solid hard walls! I'd never built a frame house or sip panel house. Clt I would consider.

[@jakubobuchowski4833]

Hi! How can one cubic meter of wood (approx 0.6 tonne) store up to 1 tonne of carbon from the atmosphere?

[@fab_structures]

Great catch! Since we made that video it’s actually been proven not to be 1 tonne and much less. Here is some data that might help explain the actual process of what’s occurring and it’s calculations! www.woodworks.org/resources/calculating-the-carbon-stored-in-wood-products/

[@jakubobuchowski4833]

@@fab_structures thanks, these calculations are much more convincing 🙂 so I can see 0.6 tonne of wood can store about 0.26 tonne of carbon, that actually relates to one tonne of CO2 equivalent. Thanks!

[@tubulartuber]

why not a self-adhered membrane?

[@fab_structures]

mainly more expensive

[@tubulartuber]

@@fab_structures makes sense. any thoughts on putting the WRB membrane onto the exterior of the wood fiberboard vs onto the exterior of the CLT assuming the wood fiber board is treated and rated to serve as a WRB?

[@fab_structures]

@@tubulartuber you are not wrong and yes you could do it onto CLT. We mostly do residential and our inspectors need to see WRB to satisfy code which is why we do it that way.

[@JohnLee-db9zt]

Looks like good fuel for a bonfire.

[@tlatoanimachi]

Bruh, its time for rammed earth. Literally nothing more than raw earth.

[@thomasschafer7268]

Looks very good. Same materials like in germany. But IT's the Mercedes under the walls.👍👍👍🇩🇪. Why make the US builder so much mistakes?