Building Science Overcladding Wood Siding

This article describes algae or mold stains on wood vinyl and other building exterior surfaces explaining the common cause as well as methods of cleaning and prevention.

Building science overcladding wood siding.

A cladding system such as a brick veneer can act as a reservoir after a rainstorm and significantly complicate wall design. A building science consulting and full service architecture firm specializing in building technology for all types of buildings including commercial institutional and residential. With vinyl and aluminum siding the drainage space is more pronounced and furring is not necessary. It is considered a good option for a backyard or garden shed because it will last for quite some time.

One common example of this occurs with lapped wood siding. A material or assembly that forms the exterior face of a wall. Ideally wood siding should be installed over furring creating a drained and vented air space between the drainage plane and wood siding. Upcoming events renovation and rehabilitation.

Examples of cladding include stucco eifs metal panels brick stone veneer wood siding and vinyl siding. Two layers of building paper and metal lath are installed shingle fashion over the exterior sheathing. And at our building science discussion group last week we discussed sheathing free walls. Alternatively wood framing or masonry can act as a hygric buffer absorbing water lessening moisture shocks.

Rain water striking the side of the house will run down the siding to the edge. Never ever put any kind of sheathing behind any kind of wood siding when our structural engineers started requiring plywood sheathing in the mid 70s for shear i got permission to put it on the interior of the walls behind the sheetrock plaster. Cladding attachment over thick exterior insulating sheathing. Capillary forces can then draw the bead of water up and behind the siding thus wetting the back side of the siding.

Traditional stucco using the drained approach figure 5 is common to wood frame or steel stud walls that are sheathed with plywood or gypsum board. With wood siding the drainage space is typically intermittent and depends largely on the profile of the siding. Building exterior walls siding trim algae or mold stain cause diagnosis cure. Eifs stucco related resources.

Walls roof trim walks. This article series catalogs the different types of stains or discolorations found on building exterior surfaces. A portland cement based stucco is then rendered over the metal lath and building papers. Cladding attachment over insulating sheathing.