A trade association for structural wood panels such as plywood and OSB, with technical guides on sheathing, flooring and wall and roof assemblies.
APA is the trade association for makers of structural wood panels such as plywood and oriented strand board. It publishes technical guides on sheathing, subfloors, roofs and walls and describes how panels are rated and used. These panels are the skin of most sheds and garages, so reading about them helps you understand what is behind the siding in Nashville and elsewhere.
The guides explain panel thickness, spacing, fasteners and moisture protection. That matters for floors that carry mowers, roofs that stand up to storms and walls that stay straight. We use panel types and fasteners suited to the building and follow maker instructions.
Visit the official APA website
How structural panels are classified and used.
Wall and roof panel details.
Subfloor thickness and spans.
Handling panels in wet weather.
Nail and screw spacing guidance.
Details for common assemblies.
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Shed and Garage Design StudioPick a shed, garage, carport or barn, set the size, roof, siding and trim colors, doors, windows and extras, and watch your building update, then send the design to us.Try it 
Shed Size and Layout PickerPick what you want to store or do inside, tick the vehicles, tools and furniture you need to fit and see the footprint, door width and loft options that usually work.Try it 
Shed and Garage Budget PlannerPick a shed, workshop, garage, carport, barn, slab, roof or upgrade, set the size and add allowances like permits, site prep and delivery to see a ballpark planning range. Placeholder values only.Try it Oriented strand board is a structural panel made from wood strands, widely used for sheathing and floors.
No. It is an association that publishes technical guidance for its members and users.
No. We are an independent shed, garage and carport builder and are not part of APA. We explain what it publishes in plain language and help you apply it to your own property.
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