Treated Pine Decking
Treated pine decking is pressure-treated Southern Yellow Pine in standard 5/4 x 6 and 2 x 6 sizes, an economical wood option for deck builders and homeowners.
About Treated Pine Decking
Pressure-treated Southern Yellow Pine is the workhorse of wood decks. The preservative treatment helps the wood resist rot and insects, and the lumber is widely available in standard sizes, which keeps it among the more affordable decking choices in most regions. Grades are commonly sold as Select, #1 and #2.
Decking boards come in 5/4 x 6 (about 1 x 5-1/2 in. actual) and 2 x 6 (1-1/2 x 5-1/2 in. actual), in 8, 10, 12, 16 and 20 ft lengths. Treated lumber is rated for above-ground use (AWPA UC3B) or ground contact (AWPA UC4A). Deck boards are normally used above ground, while posts and joists near soil call for the ground-contact rating. Once dry, boards can be sealed or stained.
Use fasteners rated for treated lumber, such as hot-dip galvanized or stainless steel, and treat field-cut ends with a copper naphthenate preservative. For a quote, list board size, grade, lengths and counts, plus framing lumber and fasteners.
Colors, sizes and specifications
Sizes and configurations
- 5/4 x 6 (actual about 1 x 5-1/2 in) in 8', 10', 12', 16', 20'
- 2 x 6 (actual 1-1/2 x 5-1/2 in) in 8', 10', 12', 16', 20'
Features
- Pressure-treated Southern Yellow Pine
- Grades commonly sold as Select, #1 and #2
- Boards can be sealed or stained once dry
Specifications
| Species | Southern Yellow Pine |
|---|---|
| Treatment | Pressure-treated; retention varies by use category |
| Above-ground rating | AWPA UC3B |
| Ground-contact rating | AWPA UC4A |
| ACQ retention (AWPA) | 0.15 lb/cu ft above ground; 0.40 lb/cu ft ground contact |
| CA-B retention | 0.10 above ground; 0.21 ground contact |
| CA-C retention | 0.06 above ground; 0.15 ground contact |
| Fasteners | Meet or exceed ASTM A153 Class D (hot-dip galvanized or ceramic-coated); ACQ is roughly five times more corrosive to steel than untreated wood |
Installation notes
- Use fasteners rated for treated lumber, such as hot-dip galvanized or stainless steel; follow the fastener maker’s guidance.
- Field-cut ends should be treated with a copper naphthenate preservative (AWPA M4 recommends at least 2.0% copper metal).
- Higher retention is required where wood touches the ground than above ground.
Frequently asked questions
Why do ground-contact boards need more preservative?
AWPA retention levels are higher for ground contact than above ground for every copper-based treatment, to resist decay and insects.
What fasteners should I use?
Fasteners meeting ASTM A153 Class D or better, or stainless steel; ordinary bright steel will corrode.
Treated Pine Decking photos
One product or the whole package
Order this on its own, with a few related products, or with everything else for the project. One itemized quote, shipped to all 50 states. Need someone to install it? Find an installer serving your area.
Request a quote for Treated Pine Decking
Send plans, measurements, or photos and we will prepare an itemized quote. You can also call us with questions.