For Inspection Do You Have To Have Plywood Sheathing Siding

If the panels are horizontal then determine if the end joints are offset such that four corners do not meet.

For inspection do you have to have plywood sheathing siding.

If the flatness of sheathing or flooring panels is acceptable apa would generally recommend that any finish flooring siding or roofing be installed as planned regardless of whether gaps are present. For siding nailed to the studs or sheathing. So now if sheathing was used under the hardi lap or panel apa would recommend a wrb. I ve heard that while it s not best practice it s not necessarily a defect unless the manufacturer states in its installation manual that.

Plywood is about 15 to 19 percent lighter than osb. Found this in the attic at today s inspection. Apa has changed their code reports and installation recommendations since then and now recommends that a wrb be installed over plywood and osb sheathing and also behind plywood shiplap joint siding. Though many builders think of the irc as a low bar bare minimum when it comes to wrb installation the code is actually best practice learn more about the building code for housewrap installation here.

Oriented strand board osb is a durable panel sheathing made from hundreds of thin wood strands that are hot pressed onto sheets with a wax and resin adhesive. Additionally in many cases we do not suggest siding over the panels with vinyl. So if you take off a piece of lap siding you have another protective layer of material before you get to the cavity of your wall. Gaps that were initially present may have closed due to normal moisture related expansion.

Or do you always need sheathing when doing hardie lap siding regardless. I m do a re clad of a wood framed building. However plywood may have weak spots which can cause core voids in the panels. I was unable to see whether the rest of the house had wrap and sheathing.

We are also re building these 10x10 decks with a 2x4 framed guardrail. Not sure when the siding was installed but all four gables were like this. The guardrails do not have t1 11 and were not slated to be sheathed. No sheathing no house wrap.

We are installing hardie colorplus lap siding over e t1 11. If the panel is 1 2 inch and its grade type is m 2 then determine if the maximum stud spacing is 16 o c. Plywood has good moisture resistance and dries fast. The diagram below shows how to correctly install the layers sheathing like osb or plywood double wall construction prior to installing the fiber cement siding to help increase any home s structural value for both shear racking force wind and any settling movement providing increased strength to the exterior walls of the home keep in mind that this is a much better re siding approach.

Most builders placed either osb or plywood behind the lap siding.