Exterior Gypsum Board Vs Plywood

The biggest complaint against osb is that it doesn t handle moisture very well so it is more suited for indoor use.

Exterior gypsum board vs plywood.

Waferboard is far less expensive than plywood. These two elements are mixed together and sandwiched in between two large sheets of sturdy paper. It is also known as drywall wallboard or plasterboard. Exterior soffit fiberglass faced gypsum sheathing contributes excellent fire water and mold resistance in soffit application whether used as an underlayment for various exterior finish systems or is directly finished itself.

Because of its correlation to structural integrity it is important to take wall sheathing materials and methods into consideration when planning a new home build or remodel. Quietrock is sheetrock that has an improved stc rating while still having the benefits of gypsum board. A 5 8 inch sheet of plywood weighs 1 8 to 2 1 pounds per square foot versus 2 75 psf for a sheet of 5 8 inch drywall. It is a preferred substrate under brick stone stucco siding and eifs due to its ability to protect a structure against incidental moisture during and after construction.

However it is much cheaper and can be double layered for the same price or even less than a single layer of mdf. Widely recognized by the gold color densglass fiberglass mat gypsum sheathing has an exemplary track record that spans more than 30 years. Don t leave the integrity of your exterior walls to chance. This means that the average 4 by 8 sheet of drywall can weigh 20 to 30 pounds.

However it tends to be weaker and less resistant to water than plywood. Regular drywall has a very similar stc to plywood osb or mdf. Gypsum based structural sheathing is a panel type material made of a noncombustible core primarily gypsum with a paper surfacing on the long edges face and back. Plywood is made up of three or more sheets of composite wood that are pressed together to make a large sheet that is usually a 1 2 inch thick.

The top 5 exterior sheathing materials include. Rely on georgia pacific gypsum s industry trusted line of high performance exterior gypsum panels including densglass sheathing the 1 architecturally specified fiberglass mat gypsum sheathing. Moisture also affects the strength of plywood. Drywall is primarily composed of dried gypsum mixed with crystallized water.

1 widely recognized by its goldcolor densglass sheathing has an exemplary track record that spans more than 30 years. Or perpendicular to. Osb has over 70 market share for structural panels. It performs well in both warm and cold environments and resists sagging when applied parallel to framing spaced no wider than 16 406 mm o c.

Exterior gypsum sheathing is designed for direct attachment to wood framing with. So while exterior glued plywood can be used outdoors it works best when moisture content remains low.