

LUMBER · BUILDING MATERIAL · HARDWARE
Boise’s Pioneer Lumber Yard.
LOCAL KNOWLEDGE · RELIABLE SUPPLY · SINCE 1905


LUMBER · BUILDING MATERIAL · HARDWARE
Boise’s Pioneer Lumber Yard.
LOCAL KNOWLEDGE · RELIABLE SUPPLY · SINCE 1905
SHOP BY MATERIAL / DRAG TO EXPLORE
What does the job need?
Shop Our Products
01
01

Dimensional Lumber
Dimensional Lumber
02
02


Post & Timbers
Post & Timbers
03
03

Posts & Timbers
Posts & Timbers
03
03

Posts & Timbers
Posts & Timbers
03
03


OSB & Plywood
OSB & Plywood
04
04

Decking
Decking
05
05

Trim & Millwork
Trim & Millwork
06
06

Engineered Wood Products
Engineered Wood Products
07
07


Fencing
Fencing
08
08

Siding
Siding
09
09

Trusses
Trusses
10
10

Sheetrock & Drywall
Sheetrock & Drywall
11
11

Hardware & Fasteners
Hardware & Fasteners
12
12

Doors & Windows
Doors & Windows
13
13

Special Orders
Special Orders
POPULAR PRODUCTS / DRAG TO EXPLORE
Straight to the staples.
VIEW ALL PRODUCTS
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2x4 - Douglas Fir-Larch
#1 · KD · S4S
The 2×4 is the everyday workhorse of light-frame construction: wall framing, plates, blocking, repairs, and small structural assemblies. This #1 Douglas Fir-Larch stock combines useful strength with kiln-dried, surfaced-four-sides consistency. Stocked for in-store pickup; verify grade, spacing, and code requirements before building.
8′ | 10′ | 12′ | 14′ | 16′

2x6 - Douglas Fir-Larch - Select Structural
Select Structural / KD / S4S
Select Structural Douglas Fir-Larch lumber for framing where plans or engineering call for a higher grade. Kiln-dried and surfaced four sides (S4S). Current inventory verifies 8′, 12′, 14′, and 16′ lengths; confirm design values and quantity before ordering.
8′ | 12′ | 14′ | 16′

2x4 - Pressure-Treated Douglas Fir
#2 & Better / CA-C .15 Ground Contact
Ground-contact 2×4 treated Douglas Fir is useful for fence rails, deck blocking, small exterior frames, and repairs exposed to recurring moisture or soil-adjacent conditions. Its CA-C .15 treatment is intended for ground-contact service. Stocked for in-store pickup; use compatible fasteners and verify the required use category.
8′ | 10′ | 12′ | 16′

4x4 - Douglas Fir Post
Standard & Better / #1 FOHC/FOW
A 4×4 Douglas Fir post is a compact structural member for bracing, shop projects, interior supports, and assemblies designed around a 4-inch post. Stock includes framing and appearance grades. Natural Douglas Fir is not pressure-treated; confirm engineering, protection, and code requirements before exterior use. Stocked for in-store pickup.
8' | 10'

1/2" - CDX Plywood
1 C face / 1 D face
The 1/2-inch CDX panel is a familiar rated-sheathing thickness for walls and roofs when the panel stamp and framing layout support the assembly. Its Exposure 1 bond is intended to tolerate construction delays, not permanent weather exposure. Stocked for in-store pickup; verify the span rating and application before building.
4′ × 8′ · 15/32″ actual

7/16" - OSB Sheathing Panel
Structural sheathing
The 7/16-inch OSB panel is a common wall-sheathing choice and may serve in rated roof assemblies when its stamp and framing spacing allow. Oriented strands give the panel consistent structural performance across framing packages. Stocked for in-store pickup; verify the span rating, strength axis, fastening, and exposure requirements.
4′ × 8′ · 7/16″ actual

2x4 - Douglas Fir-Larch
#1 · KD · S4S
The 2×4 is the everyday workhorse of light-frame construction: wall framing, plates, blocking, repairs, and small structural assemblies. This #1 Douglas Fir-Larch stock combines useful strength with kiln-dried, surfaced-four-sides consistency. Stocked for in-store pickup; verify grade, spacing, and code requirements before building.
8′ | 10′ | 12′ | 14′ | 16′

2x4 - Pressure-Treated Douglas Fir
#2 & Better / CA-C .15 Ground Contact
Ground-contact 2×4 treated Douglas Fir is useful for fence rails, deck blocking, small exterior frames, and repairs exposed to recurring moisture or soil-adjacent conditions. Its CA-C .15 treatment is intended for ground-contact service. Stocked for in-store pickup; use compatible fasteners and verify the required use category.
8′ | 10′ | 12′ | 16′

4x4 - Douglas Fir Post
Standard & Better / #1 FOHC/FOW
A 4×4 Douglas Fir post is a compact structural member for bracing, shop projects, interior supports, and assemblies designed around a 4-inch post. Stock includes framing and appearance grades. Natural Douglas Fir is not pressure-treated; confirm engineering, protection, and code requirements before exterior use. Stocked for in-store pickup.
8' | 10'

7/16" - OSB Sheathing Panel
Structural sheathing
The 7/16-inch OSB panel is a common wall-sheathing choice and may serve in rated roof assemblies when its stamp and framing spacing allow. Oriented strands give the panel consistent structural performance across framing packages. Stocked for in-store pickup; verify the span rating, strength axis, fastening, and exposure requirements.
4′ × 8′ · 7/16″ actual

2x4 - Douglas Fir-Larch
#1 · KD · S4S
The 2×4 is the everyday workhorse of light-frame construction: wall framing, plates, blocking, repairs, and small structural assemblies. This #1 Douglas Fir-Larch stock combines useful strength with kiln-dried, surfaced-four-sides consistency. Stocked for in-store pickup; verify grade, spacing, and code requirements before building.
8′ | 10′ | 12′ | 14′ | 16′

2x6 - Douglas Fir-Larch - Select Structural
Select Structural / KD / S4S
Select Structural Douglas Fir-Larch lumber for framing where plans or engineering call for a higher grade. Kiln-dried and surfaced four sides (S4S). Current inventory verifies 8′, 12′, 14′, and 16′ lengths; confirm design values and quantity before ordering.
8′ | 12′ | 14′ | 16′

2x4 - Pressure-Treated Douglas Fir
#2 & Better / CA-C .15 Ground Contact
Ground-contact 2×4 treated Douglas Fir is useful for fence rails, deck blocking, small exterior frames, and repairs exposed to recurring moisture or soil-adjacent conditions. Its CA-C .15 treatment is intended for ground-contact service. Stocked for in-store pickup; use compatible fasteners and verify the required use category.
8′ | 10′ | 12′ | 16′

4x4 - Douglas Fir Post
Standard & Better / #1 FOHC/FOW
A 4×4 Douglas Fir post is a compact structural member for bracing, shop projects, interior supports, and assemblies designed around a 4-inch post. Stock includes framing and appearance grades. Natural Douglas Fir is not pressure-treated; confirm engineering, protection, and code requirements before exterior use. Stocked for in-store pickup.
8' | 10'

1/2" - CDX Plywood
1 C face / 1 D face
The 1/2-inch CDX panel is a familiar rated-sheathing thickness for walls and roofs when the panel stamp and framing layout support the assembly. Its Exposure 1 bond is intended to tolerate construction delays, not permanent weather exposure. Stocked for in-store pickup; verify the span rating and application before building.
4′ × 8′ · 15/32″ actual

7/16" - OSB Sheathing Panel
Structural sheathing
The 7/16-inch OSB panel is a common wall-sheathing choice and may serve in rated roof assemblies when its stamp and framing spacing allow. Oriented strands give the panel consistent structural performance across framing packages. Stocked for in-store pickup; verify the span rating, strength axis, fastening, and exposure requirements.
4′ × 8′ · 7/16″ actual
OUR MISSION / SINCE 1905
OUR MISSION / SINCE 1905
Dependable material.
Knowledgeable service. Confidence for the work ahead.
Dependable material.
Knowledgeable service
Dependable material.
Knowledgeable service. Confidence for the work ahead.
Capital Lumber supports builders, homeowners, and craftspeople with quality lumber, building materials, hardware, and people who know the work.
Quality lumber and building materials from people who know the work.
FOR CONTRACTORS + BUILDERS
Built for crews that
build every day.
Built for crews that
build every day.
Built for crews that
build every day.
Open a contractor account for job pricing, organized delivery, and a direct line to people who know the material.
01
JOB PRICING
Account-specific quotes and material packages.
JOB PRICING
Account-specific quotes and material packages.
02
DELIVERY
Coordinated drops with clear service-area guidance.
DELIVERY
Coordinated drops with clear service-area guidance.
03
TERMS
Net terms available after account review.
TERMS
Net terms available after account review.
HOURS
MON–FRI 7:30–5
SATURDAY 8–4
SUNDAY CLOSED





