Marine grade would be your best option. Answer from Retired_Knight_MC on reddit.com
The Home Depot
homedepot.com › p › 1-2-in-x-4-ft-x-8-ft-CDX-Ground-Contact-Pressure-Treated-Pine-Plywood-131876 › 206970940
1/2 in. x 4 ft. x 8 ft. CDX Ground Contact Pressure-Treated Pine Plywood 131876 - The Home Depot
February 24, 2021 - Perfectly complete your outdoor projects with the help of this excellent Unbranded 1/ CDX Ground Contact PressureTreated Plywood.
Lowe's
lowes.com › pd › Severe-Weather-Pine-Pressure-Treated-Plywood-Common-1-2-x-4-ft-x-8-ft-Actual-0-468-in-x-48-in-x-95-868-in › 50017238
Severe Weather Pine Pressure Treated Plywood (Common: 1/2 x 4-ft x 8-ft; Actual: 0.468-in x 48-in x 95.868-in) at Lowes.com
Shop severe weather pine pressure treated plywood (common: 1/2 x 4-ft x 8-ft; actual: 0.468-in x 48-in x 95.868-in) at Lowes.com
What kind of plywood is suitible for exterior use but is not pressure treated?
Marine grade would be your best option. More on reddit.com
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June 6, 2025Need 1/2-in Pressure Treated Shims (no bandsaw, no planer)
Plastic shims or just cut them with a worm drive. More on reddit.com
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June 3, 2022Pressure treated plywood vs Regular Plywood for shed floor
Pressure treated More on reddit.com
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July 12, 2024Why pressure treated plywood is not used for sheathing?
If the sheathing gets wet, it will soak through to the interior side, causing mold and rot of the framing. More on reddit.com
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March 5, 2024Menards
menards.com › main › building-materials › panel-products › plywood-sheathing › ac2-reg-4-x-8-above-ground-green-pressure-treated-ccx-plywood-sheathing › 1235040 › p-1444422737171-c-13331.htm
AC2® 1/2 x 4 x 8 Above Ground Green Pressure Treated CCX Plywood Sheathing at Menards®
AC2® 1/2 x 4 x 8 Above Ground Green Pressure Treated CCX Plywood Sheathing
This plywood sheathing has been pressure treated for above ground (AG) applications. AC2® brand treated wood products use MicroPro® technology, which is a revolutionary way to pressure-treat wood. MicroPro® technology offers many benefits including significantly improved corrosion performance. MicroPro®/AC2® pressure-treated wood products are protected from termites and fungal decay and are backed by a Koppers Residential and Agricultural Limited Warranty Program (see warranty for details).
Price $50.98
Carlsbuildingsupply
carlsbuildingsupply.com › home › 14-treated lumber › 11-treated plywood
1/2" PLYWOOD PRESSURE-TREATED 4X8 CDX 15/32" ACTUAL SIZE .60 lbs PCF KDAT
11-Treated Plywood · Previous Next · Close · Previous Next · SKU# CDX12PT · 1/2 PLYWOOD PRESSURE-TREATED $ 41.33/EA · Pack Quantity · The quantity that makes up a standard package. You must order in units of this quantity. Items are sold in Gross and Pieces.
Hancock Lumber
shop.hancocklumber.com › product › 1-2-4-x8-cdx-syp-pressure-treated-plywood-ground-contact
1/2" 4'X8' CDX SYP PRESSURE TREATED PLYWOOD GROUND CONTACT | Treated Plywood | Hancock Lumber Shop
1/2" 4'X8' CDX SYP PRESSURE TREATED PLYWOOD GROUND CONTACT
1/2" 4'X8' CDX SYP PRESSURE TREATED PLYWOOD GROUND CONTACT · Product Code: 12CDXPPT · 3/4" 4'X8' CDX SYP PRESSURE TREATED PLYWOOD GROUND CONTACT · Product Code: 34CDXPPT ·
Price $56.33
The Home Depot
homedepot.com › lumber & composites › plywood
1/2 - Pressure Treated - Plywood - The Home Depot
Get free shipping on qualified Pressure Treated, 1/2 Plywood products or Buy Online Pick Up in Store today in the Lumber & Composites Department.
LENCO Supplies
lenco.supplies › product › 1-2x4x8-treated-plywood
1/2"x4x8 TREATED PLYWOOD - LENCO Supplies
Ideal for DIY decor and construction, it can be easily cut, drilled, routed, glued, and fastened with ordinary woodworking tools. The pressure-treated nature of this plywood ensures long-lasting durability and resistance to environmental elements, ...
Reddit
reddit.com › r/woodworking › what kind of plywood is suitible for exterior use but is not pressure treated?
r/woodworking on Reddit: What kind of plywood is suitible for exterior use but is not pressure treated?
June 6, 2025 -
I'm putting together a shed from a kit. It has a metal frame for the base which is covered in plywood for the floor. The instructions for the base say you need to use at least 5/8" thick exterior plywood but it states specifically that use of pressure-treated wood is strictly forbidden and will void the warranty.
What kind of plywood is suitable for exterior use and contact with moisture but is not pressure treated?
Menards
menards.com › main › building-materials › panel-products › plywood-sheathing › ac2-reg-4-x-8-green-pressure-treated-ground-contact-ccx-plywood-sheathing › 1235100 › p-1444448725840-c-13331.htm
AC2® 1/2 x 4 x 8 Green Pressure Treated Ground Contact CCX Plywood Sheathing at Menards®
AC2® 1/2 x 4 x 8 Green Pressure Treated Ground Contact CCX Plywood Sheathing
This 1/2-by-4-by-8 AC2® CCX plywood has been pressure treated for ground contact (GC) applications. AC2® brand treated wood products use MicroPro® technology, which is a revolutionary way to pressure-treat wood for decks, fences, landscaping, and general construction uses. MicroPro® technology offers many benefits, including significantly improved corrosion performance. MicroPro®/AC2® pressure-treated wood products are protected from termites and fungal decay and are backed by a Koppers Residential and Agricultural Limited Warranty Program (see warranty for details).
Price $53.98
Sunnyvale Lumber
sunnyvalelumber.com › pressure-treated-plywood
PRESSURE TREATED PLYWOOD
Category PRESSURE TREATED PLYWOOD · $59.99 / PC · Other selling quantities available · DELIVERY · PICK-UP · Check stock in other branches · Your local branch is Sunnyvale Lumber, Sunnyvale · Call for price · Quick View · 1/2"X4X8 CD PT (STRUC 1) 5-PLY EXP.
Negypsum
negypsum.com › product › PTPLY12X8
1/2 in x 4 ft x 8 ft Pressure Treated Rated Sheathing Plywood
Joint Treatment · Lumber · Safety · Shower Systems · Steel · Surface Protection · Tools · Products · Articles · Services · About Us · Locations · Quick Order · Home Lumber Plywood 1/2 in x 4 ft x 8 ft Pressure Treated Rated Sheathing Plywood · PART PTPLY12X8 ·
Fleet Farm
fleetfarm.com › home improvement › building supplies › lumber › plywood & osb › universal forest products 1/2 in x 4 ft x 8 ft cdx treated plywood
1/2 inch CDX Plywood Pressure Treated 4 x 8 Sheets Yellow Pine - Fleet Farm
1/2 in x 4 ft x 8 ft CDX Treated Plywood
1/2 in x 4 ft x 8 ft CDX Treated Plywood
Price $46.99
Cowlsbuildingsupply
cowlsbuildingsupply.com › p › 12-x-4-x-8-ul-pressure-treated-plywood › 12CDPT
1/2 x 4 x 8 Ul Pressure Treated Plywood
KITCHEN & BATH DESIGN · Cowls Building supply is located in the newest developing experiential community in North Amherst, MA. To learn more about what The Mill District has to offer, visit their website below
Call (413) 549-0001
Address 125 Sunderland Road, 01059, Amherst
The Home Depot
homedepot.com › p › ProWood-1-2-in-x-2-ft-x-4-ft-Pressure-Treated-Pine-Plywood-Project-Panel-205959 › 205603721
ProWood 1/2 in. x 2 ft. x 4 ft. Pressure-Treated Pine Plywood Project Panel 205959 - The Home Depot
August 24, 2025 - Make store displays, higher end signs or your kitchen counter with the selection of this Dimensions 1/ Pine PressureTreated Plywood.
Culpeper Treated Lumber
culpeperwood.com › home › what you need to know about pressure-treated plywood
What You Need to Know About Pressure-Treated Plywood - Culpeper Treated Lumber
April 10, 2025 - Additionally, pressure-treated plywood is widely used in concrete forming, which involves creating molds or frames for custom shapes. The end product is a hardened concrete structure, such as those needed for foundations, slabs, or walls. In these instances, builders will often use either 1/2-inch pressure-treated plywood, 5/8-inch pressure-treated plywood, 3/4-inch pressure-treated plywood, or 1-inch pressure-treated plywood.
Gatorgypsum
gatorgypsum.com › product › PTPLY12X8
1/2 in x 4 ft x 8 ft CDX Pressure Treated Plywood
Pressure-treated plywood is used when extra protection against weather, insect, and fungal damage is needed.
Discountbuilderssupplysf
discountbuilderssupplysf.com › p › pressure-treated-12-x-4-x-8-5-ply-structural-1-plywood › 73402395
Pressure Treated 1/2" x 4' x 8' - 5 Ply Structural 1 Plywood
Visit Discount Builders Supply & Hardware in San Francisco for hardware, lumber, paint & tools. Free private parking lot & local delivery available for a fee.
Call (415) 621-8511
Address 1695 Mission Street, 94103, San Francisco
Menards
menards.com › main › building-materials › panel-products › plywood-sheathing › ac2-reg-2-x-4-green-pressure-treated-ccx-plywood-sheathing-handi-panel › 1234020 › p-1444431330493-c-13331.htm
AC2® 1/2 x 2 x 4 Green Pressure Treated CCX Plywood Sheathing Handi-Panel at Menards®
AC2® 1/2 x 2 x 4 Green Pressure Treated CCX Plywood Sheathing Handi-Panel
This treated plywood handi-panel is perfect for a variety of projects. The treatment adds resistance to insects and will last longer than untreated plywood.
Price $19.39
The Home Depot
homedepot.com › p › 1-2-in-x-4-ft-x-8-ft-Ground-Contact-Southern-Yellow-Pine-Pressure-Treated-Plywood-PLY12MGYCDX › 207005716
1/2 in. x 4 ft. x 8 ft. Ground Contact Southern Yellow Pine Pressure-Treated Plywood PLY12MGYCDX - The Home Depot
February 24, 2021 - Find a strong and durable solution for your outdoor flooring profile by choosing this excellent Unbranded 1/ Ground Contact Southern Yellow Pine PressureTreated Plywood.
The Home Depot
homedepot.com › lumber & composites › plywood
Pressure Treated - Plywood - The Home Depot
pressure-treated pine plywood · rated sheathing · sill plate · untreated wood · wide variety · 1/2 · 1/8 · 3/4 · 5/8 · 15/32 · 19/32 · 23/32 · 1 · 4 · 8 · Plywood Sheathing · 1 · 2 · 4 · Exposure 1 · Exterior · Interior · Pressure Treated ·