No Sheathing Under Siding

There is no sheathing.

No sheathing under siding. In theory the sheathing on your home should never get wet as long as the proper preparations are made when siding the home flashing house wrap j channel caulk etc. Tonight i was replacing some outdoor lighting only to find to me surprise this house has no ouside sheathing. I m replacing siding and insulating 1850 home. If i add 3 8 ply then siding will be proud of corners and casings.

It also provides a. We are installing hardie colorplus lap siding over e t1 11. I have seen houses with no sheathing old or non structural sheathing new and the foam could absolutely be structural enough to support the siding as long as adequate bracing is done it really doesn t matter. Where you ll often see plywood used instead of osb is in roof sheathing where the risks of moisture and leaks are greater.

Or do you always need sheathing when doing hardie lap siding regardless. The construction from outside in is. 1 no flashing windows or z. Using 1 2 x 6 clear cedar bevel siding and since no sheathing insulation can be fiberglass any recommendations.

It adds insulation waterproofing and structural support for the framing. Call it what it is an idiotic installation. The wood that goes under residential siding exterior sheathing performs several functions. I m do a re clad of a wood framed building.

My main concern was a wrb covered drainage plane which i was misled into thinking wasn t there. Tri level home built in mid 70 s with 4 stud walls with bat insulation without any sheathing under masonite sheet siding with battens on 16 centers with no vapor barrier of any kind 3 8 or 7 16 siding then 3 1 2 insulation 3 8 drywall between me and the outdoors where siding joined between upper lower sheets no z bar installed only lapped over approx. Vinyl siding is a rain screen only and is not waterproof. Vinyl siding house wrap 1 1 4 pink hard insulation foam board 6 inches batt insulation and the inside sheat rock.

While the installation of the vinyl siding without sheathing or housewrap behind it may be technically legal it is not good building practice and quite frankly is stupid.