Sheathing / Discussions

Can you use boards instead of sheathing?

...sheathing will definitely reduce lumber costs when framing a house, which is a very good thing given wood is currently about 150% up in price since pre-covid. This page about ways to cut back on lumber when building houses will probably be of interest to you as well -  How to build high performance houses using less lu...

Posted by Stephen Montgomery May 30, 2021 Wall assemblies - new construction 1 response

What kind of non-toxic exterior sheathing can be used in place of plywood?

...sheathing (on top of ext stud wall, underneath finish ext siding) has formaldyde, glues all of which are toxic.  What can I use that will be non-toxic, or at least much less toxic? Thank you very much! pier charter OSB and plywood exterior sheathing no longer contain Urea Formaldehyde, so they really aren’t that toxic ...

Posted by pier charter June 4, 2020 Wood and organic materials 1 response

What is safer than OSB for someone with multiple chemical sensitivities?

...sheathing? We prefer to use Plywood instead of OSB as sheathing, read more here. The latest Ecohome demo house is targeting LEED Platinum, and has extremely safe air quality. All the interior finishing (walls and trim) were done with a formaldehyde-free UV treated non-toxic plywood, so if you are considering it for ind...

Posted by Ian Smith April 27, 2020 Healthy indoor air quality 1 response

Should a Vapor Barrier be installed over Exterior Grade Plywood?

I have a 40 year old cottage in the Kawarthas.  It has exterior grade Plywood.  The walls are insulated with traditional Fiberglass Pink.  I will be putting solid 3/4" wood siding over top of the exterior walls.  I plan on strapping the cottage with 1" x 2" and filling the gaps with 1" of Rigid Foam insulation.  In the...

Posted by Michael Klauck March 6, 2020 Air and vapour barriers 1 response

Is the ZIP sheathing system good or bad for water control?

...sheathing with a fully adhered sheathing membrane? ZIP Sheathing is a pretty hot topic with some differing opinions. The ZIP System is a structural sheathing intended for walls and roofs, with an OSB base and WRB (weather resistive membrane), which is basically a mesh that is attached to an OSB sheathing panel with a p...

Posted by Trevor Prinz Nov. 26, 2019 Walls and Roofs 5 responses

How do you attach exterior siding without affecting the air barrier on a passive house?

...Sheathing System is an air barrier sheathing when the joints are taped as specified by the manufacturer. There should not be any notable air leakage from additional fasteners used to attach insulation that you need to worry about. A nail or screw driven into wooden sheathing will pretty much fill its own hole. In our 2...

Posted by Scott Bowker July 16, 2018 Wall assemblies - new construction 3 responses