Best Pressure-Treated Lumber for DIYers
Pressure-treated wood resists rot and insects for outdoor builds. The key is matching the treatment grade to the job: ground-contact for anything near soil, above-ground for the rest. Brands matter less than grade.
What to look for
- ·Use Ground Contact (UC4A) for posts, beams, joists, and anything within 6 inches of soil. Above-Ground (UC3B) is fine for deck boards and rails up off the ground.
- ·Let new treated lumber dry before staining, often several weeks, until water soaks in instead of beading.
- ·Use hot-dipped galvanized or stainless fasteners and connectors. Treated wood corrodes cheap fasteners fast.
Quick comparison
| Product | Tier | Price | Best for |
|---|---|---|---|
| YellaWood Ground Contact Treated | Editor's pick | Varies by size (2x8x8 ~$12 to $18) | Posts, beams, and ground contact |
| Severe Weather Ground Contact (Lowe's) | Editor's pick | Varies by size (2x8x8 ~$12 to $18) | Lowe's ground-contact framing |
| WeatherShield Ground Contact (Home Depot) | Editor's pick | Varies by size (4x4x8 ~$10 to $16) | Home Depot ground-contact framing |
| ProWood Above-Ground Treated | Best value | Varies by size (5/4x6x8 ~$8 to $13) | Deck boards and railings |
| Severe Weather Above-Ground (Lowe's) | Best value | Varies by size (5/4x6x8 ~$8 to $13) | Lowe's decking surfaces |
| Standard #2 Above-Ground Treated | Best value | Varies by size (2x4x8 ~$5 to $9) | General above-ground building |
| Economy Treated Fence Boards | Budget pick | Varies (1x6x6 picket ~$3 to $6) | Budget fencing |
| Treated Landscape Timbers | Budget pick | Varies ($5 to $10 each) | Borders and raised beds |
| Treated Furring Strips | Budget pick | Varies ($2 to $5 each) | Utility and spacing |
Editor's pick
YellaWood Ground Contact Treated
Varies by size (2x8x8 ~$12 to $18)
A widely trusted ground-contact brand for posts, beams, and joists near soil. Consistent treatment and quality, backed by a lifetime limited warranty against rot and termites.
Best for: Posts, beams, and ground contact
Typically available at Lumber yards, Home Depot.
Severe Weather Ground Contact (Lowe's)
Varies by size (2x8x8 ~$12 to $18)
Lowe's premium ground-contact line, available in standard and Above Ground tiers. Reliable treatment for structural deck and fence framing in contact with soil.
Best for: Lowe's ground-contact framing
Typically available at Lowe's.
WeatherShield Ground Contact (Home Depot)
Varies by size (4x4x8 ~$10 to $16)
Home Depot's ground-contact treated lumber for posts and structural members near grade. Consistent quality and easy to source for a deck or fence build.
Best for: Home Depot ground-contact framing
Typically available at Home Depot.
Best value
ProWood Above-Ground Treated
Varies by size (5/4x6x8 ~$8 to $13)
Above-ground treated lumber for deck boards, railings, and trim that stay off the soil. Less treatment than ground contact, so it costs less for the parts that allow it.
Best for: Deck boards and railings
Typically available at Home Depot, Lumber yards.
Severe Weather Above-Ground (Lowe's)
Varies by size (5/4x6x8 ~$8 to $13)
Lowe's above-ground treated boards for decking surfaces and rails. A cost-effective choice for the non-structural, off-the-ground parts of a build.
Best for: Lowe's decking surfaces
Typically available at Lowe's.
Standard #2 Above-Ground Treated
Varies by size (2x4x8 ~$5 to $9)
Common construction-grade above-ground treated lumber from local yards. The everyday choice for fence rails, deck framing off the ground, and general outdoor builds.
Best for: General above-ground building
Typically available at Lumber yards.
Budget pick
Economy Treated Fence Boards
Varies (1x6x6 picket ~$3 to $6)
Lower-cost treated pickets and boards for fencing where appearance is secondary. Expect more knots and movement, but a budget-friendly choice for a privacy fence.
Best for: Budget fencing
Typically available at Home Depot, Lowe's, Lumber yards.
Treated Landscape Timbers
Varies ($5 to $10 each)
Inexpensive treated timbers for borders, raised beds, and light retaining. Rough and rustic, but a cheap way to edge a yard or build a simple bed.
Best for: Borders and raised beds
Typically available at Home Depot, Lowe's.
Treated Furring Strips
Varies ($2 to $5 each)
Cheap treated strips for spacing, blocking, and utility work outdoors. Not structural, but a low-cost essential for many fence and deck details.
Best for: Utility and spacing
Typically available at Home Depot, Lowe's.
Frequently asked
What is the difference between ground-contact and above-ground lumber?+
Ground Contact (UC4A) has more preservative and resists rot in or near soil, so use it for posts, beams, joists, and anything within 6 inches of the ground. Above-Ground (UC3B) has less treatment and costs less, fine for deck boards and railings with good drainage and airflow.
How long before I can stain treated lumber?+
Wait until the wood dries enough that water soaks in rather than beading, often several weeks to a few months depending on climate. Staining too early traps moisture and the finish will not bond.
What fasteners do I use with treated wood?+
Modern treatments corrode ordinary steel quickly. Use hot-dipped galvanized, stainless, or coated fasteners and connectors rated for treated lumber, especially for structural connections and ground contact.
Is treated lumber safe to handle and build with?+
Today's treatments (like MCA and ACQ) replaced older arsenic-based ones and are considered safe for decks, fences, and raised beds with normal precautions. Wear gloves and a dust mask when cutting, and do not burn the scraps.
Treated lumber or composite for a deck?+
Treated lumber costs less up front but needs periodic cleaning and staining. Composite costs more but skips the maintenance. For framing and posts, treated lumber is standard even under a composite deck surface.
Planning a bigger job? See the full Decking project guide: cost, DIY vs. hire, and the whole plan.
Open the Decking guide →