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7/8" Tongue & Groove OSB Subfloor – 4x8

120 pieces in stock — Boise yard
$31.84 per piece

Available for pickup or delivery

Online orders are typically staged same day for fast, hassle-free pickup or on your selected pickup date.

Boise Lumberyard

1200 Lake Hazel Ln
Boise, ID 83705

Phone Number:
208-283-6056

★★★★★ 5.0 · 17 Google reviews

View all Google reviews →

Bulk purchase pricing

Applies to the entire order (mix & match across all products).

Order total
Your price
$500–$1,999
Tier 1 discount
$30.25 / pc
$2,000–$5,999
Tier 2 discount
$29.29 / pc
$6,000+
Best public pricing tier
$28.02 / pc

Full house packages may qualify for deeper price discounts.

Boise Lumberyard

1200 Lake Hazel Ln
Boise, ID 83705

Phone Number:
208-283-6056

★★★★★ 5.0 · 17 Google reviews

View all Google reviews →
Framing Lumber | Timbers & Posts | Pressure-Treated Lumber | OSB Sheathing | I-Joists | Rim Board | LVL Beams | Boards | House Packages

Product Description

7/8" Tongue & Groove OSB Subfloor is supplied through our Boise, Idaho lumberyard for construction projects throughout the Treasure Valley. This premium, heavy-duty structural panel is engineered for residential floor systems requiring maximum stiffness and a more solid, quiet feel underfoot. The increased thickness provides superior load-carrying capacity and significantly reduces floor deflection compared to standard subfloor panels, making it a strong choice for large-format tile and luxury hardwood installations.

Specifications
  • Thickness: 7/8"
  • Panel Size: 4x8
  • Edge Profile: Tongue & Groove
  • Product Type: OSB Subfloor
  • Span Rating: 48/24
  • APA Rated: Yes
Common Uses
  • High-stiffness residential floor systems
  • Subfloor over I-joists or dimensional lumber joists
  • Projects requiring reduced floor deflection and movement
  • Single-family and light multi-family construction
Contractor & Builder Notes
  • Exposure 1 rated for limited moisture exposure during construction
  • Often selected for higher-end homes or long-span floor systems
  • T&G edges typically eliminate the need for edge blocking
  • Installed per IRC or IBC requirements, as applicable

Delivery Options

  • Fast pickup at our Boise yard
  • Moffett job-site unload available
  • Combine with OSB, LVLs, I-joists, or additional framing lumber in one delivery

Return Policy

  • 100% store credit on all items returned in unused, like-new, fully resaleable condition.
  • Store credit can be used toward any future purchase and does not expire.

If you already have a material list

Email it to info@dynamiclumbersolutions.com for fast, accurate pricing.

Many customers save significantly when they price their full list with us.

No material list yet?

If your project is already moving forward and you need a material list, we can help with quantity takeoffs for active builds.