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LUMBER, PLYWOOD & EWP

For construction projects or home renovations of all sizes, Knowles Building Centre is the trusted destination for building supplies in Kapuskasing and the surrounding area. Contractors and do-it-yourselfers come to Knowles Building Centre for quality name brands and experienced staff who can help with specifying and estimating your construction, home renovation and outdoor living projects.    

Knowles Building Centre always has a wide selection of dimensional lumber, plywood, engineered and composite wood, PWF and hardboards in stock. You can rely on our fast, dependable delivery to keep your construction project on track. Want to know more about sustainable building? Our team also has up-to-date expertise on current trends, energy-efficient products, waste reduction and green building supplies made from renewable resources.

Need an estimate? Request a quote or contact us to speak with one of our lumber experts now.

Lumber Charts Decks & Fencing

Dimensional Lumber

Dimensional Lumber

We carry various grades of dimensional, pressure treated and untreated lumber (ranging in size from 2x4 to 2x12), posts (4x4 and 6x6) and species (cedar, pine and spruce). We also have strapping in 2x2, 1x4 and 1x6. For more information about our size, check out our Lumber Chart or contact us

Plywood

Plywood & OSB

Some of our stock and product we can access includes pine, oak and birch cupboard stock (veneer particle core) in various thicknesses, spruce, Good One Side (G1S) fir, marine-grade pressure treated and aspenite (Chip Board). Check out our Plywood Chart for size dimensions or contact us

Engineered Wood

Engineered Wood Products (EWP)

We can assist you with your engineered flooring systems and pre-engineered beams. Please contact us for more information or request a free estimate for your build.

Pressure Treated Wood

Pressure Treated Lumber

Pressure treating helps wood withstand the elements and ward off insects and fungal decay. We carry pressure treated lumber (sizes from 2x4 to 2x12), posts (4x4 and 6x6), decking, lattice, fence boards, stair stringers, spindles, balusters and mini ties (3x5). Check out more sizes on our Pressure Treated Lumber Chart below.
More about decks



Lumber

Spruce, Cedar, Oak, Maple & Pine

  • SPRUCE
  • SPRUCE KD 1"X 2"X 8'
    sku SP128
  • SPRUCE  1"X 3"X 8'
    sku SP138
  • SPRUCE UTIL/BTR 1"X 3"X 12'
    sku SP1312
  • SPRUCE UTIL/BTR 1"X 4"X 12'
    sku SP1412
  • SPRUCE UTIL/BTR 1"X 6"X 16'
    sku SP1616
  • SPRUCE UTIL/BTR 2"X 2"X 8'
    sku SP228
  • SPRUCE STUD 2"X 3"X 8'
    sku SP238
  • SPRUCE STUD  2"X 4"X 92-5/8"
    sku SP24S
  • SPRUCE ECONO 2"X 4" ECONO
    sku SP24E
  • SPRUCE CONST. KD 2"X 4" X 8'
    sku SP248
  • SPRUCE CONST. KD 2"X 4"X 10'
    sku SP2410
  • SPRUCE CONST. KD 2"X 4"X 12'
    sku SP2412
  • SPRUCE CONST. KD 2"X 4"X 14'
    sku SP2414
  • SPRUCE CONST. KD 2"X 4"X 16'
    sku SP2416
  • SPRUCE STUD 2"X 6" X 92-5/8"
    sku SP26S
  • SPRUCE CONST. KD 2"X 6"X 8'
    sku SP268
  • SPRUCE CONST. KD 2"X 6"X 10'
    sku SP2610
  • SPRUCE CONST. KD 2"X 6"X 12'
    sku SP2612
  • SPRUCE CONST. KD 2"X 6"X 16'
    sku SP2616
  • SPRUCE CONST. KD 2"X 8"X 12'
    sku SP2812
  • SPRUCE CONST. KD 2"X 8"X 16'
    sku SP2816
  • SPRUCE CONST. KD 2"X 10"X 10'
    sku SP21010
  • SPRUCE CONST. KD 2"X 10"X 12'
    sku SP21012
  • SPRUCE CONST. KD 2"X 10"X 16'
    sku SP21016
  • SPRUCE CONST. KD 2"X 12"X 16'
    sku SP21216
  • SPRUCE ROUGH 2"X 10"X 16'
    sku SP21016R
  • CEDAR
  • CEDAR WESTERN RED 2"X 6"X 8'
    sku 268C
  • WESTERN RED CEDAR 1X6X8' 6PCS
    sku 16RCT
  • CEDAR WESTERN RED 2"X 4"X 8'
    sku 248C
  • OAK
  • RED OAK ROUGH 1" X 5"
    sku S15RO
  • RED OAK ROUGH 1" X 6"
    sku 16RO
  • RED OAK ROUGH 1" X 7"
    sku 17RO
  • RED OAK ROUGH 1" X 8"
    sku 18RO
  • RED OAK ROUGH 1" X 9"
    sku 19RO
  • RED OAK ROUGH 2" X 7"
    sku 27RO
  • RED OAK ROUGH 2" X 8"
    sku 28RO
  • RED OAK ROUGH 2" X 9"
    sku 29RO
  • RED OAK ROUGH 2" X 10"
    sku 210RO
  • RED OAK ROUGH 2"X 6"'
    sku 26RO
  • BIRCH
  • BIRCH ROUGH 1"X 8"
    sku 18RB
  • BIRCH ROUGH 1"X 9"
    sku 19RB
  • BIRCH ROUGH SELECT 2"X 6"
    sku 26RB
  • BIRCH ROUGH SELECT 2"X 7"
    sku 27RB
  • BIRCH ROUGH SELECT 2"X 8"
    sku 28RB
  • MAPLE
  • MAPLE ROUGH 1"X 6"
    sku 16RM
  • MAPLE ROUGH 1"X 8"
    sku 18RM
  • MAPLE ROUGH 1"X 7"
    sku 17RM
  • MAPLE ROUGH 1"X 10"
    110RM
  • MAPLE ROUGH 1" X 9"
    sku 19RM
  • PINE
  • PINE SELECT WHITE 1"X 2"
    sku 12PS
  • PINE SELECT WHITE 1'X 3'
    sku 13PS
  • PINE WHITE 1"X 4" #1 & #2
    sku 14P
  • PINE WHITE 1"X 6" #1 & #2
    sku 16P
  • PINE WHITE 1"X 4" #1 & #2
    sku 14P
  • PINE WHITE 1"X 8" #1 & #2
    sku 18P
  • PINE WHITE 1"X 10" #1 & #2
    sku 110P
  • PINE WHITE 1"X 12" #1 & #2
    sku 112P
  • PINE WHITE 2"X 6"
    sku 26P


Plywood

Plywood Fir & Spruce, OSB, Pressure Treated, Veneer, Melamine & Hardboard

  • PLYWOOD FIR & SPRUCE
  • PLYWOOD G1S FIR 1/4"X 4'X 8'
    sku 14G1S
  • PLYWOOD G1S FIR 3/8"X 4'X 8'
    sku 38G1S
  • PLYWOOD G1S FIR 1/2"X 4'X 8'
    sku S12G1S
  • PLYWOOD G1S FIR 5/8"X 4'X 8'
    sku 58G1S
  • PLYWOOD G1S FIR 3/4"X 4'X 8'
    sku 34G1S
  • PLYWOOD SPRUCE STD 3/8"X 4'X 8'
    sku 38S
  • PLYWOOD SPRUCE STD 1/2"X 4'X 8'
    sku 12S
  • PLYWOOD SPRUCE STD 5/8"X 4'X 8'
    sku 58S
  • PLYWOOD SPRUCE T&G 5/8"X 4'X 8'
    sku 58STG
  • PLYWOOD SPRUCE STD 3/4"X 4'X 8'
    sku 34S
  • OSB, PWF & PRESSURE TREATED
  • ASPENITE 7/16"X 4'X 8'
    sku 716A
  • ASPENITE T&G 5/8"X 4'X 8'
    sku 58A
  • PLYWOOD PWF 5/8"X 4'X 8'
    sku PWF58
  • PT PLYWOOD 5/8"X 4'X 8'
    sku 58PT
  • VENEER PLYWOOD
  • 4X8 1/2" RADIADA PINE
    sku 00011
  • PLYWOOD MAH. 5.5MM x4'X 8'
    sku 55M
  • PLYWOOD BIRCH G1S 1/4"X 4'X 8'
    sku 14BV
  • PLYWOOD BIRCH G2S 1/2"X 4'X 8'
    sku 12BV
  • PLYWOOD BIRCH VC #2 3/4"X 4'X8'
    sku 34BV2
  • PLYWOOD OAK VC 1/4"X 4'X 8'
    sku 14OV
  • PLYWOOD OAK VC 1/2"X 4'X 8'
    sku 12OV
  • PLYWOOD OAK VC 3/4"X 4'X 8'
    sku 34OV
  • 3/8X4X8 BEADED PINE 2" O.C.
    sku 38BP
  • 1/4 4X4 POPLAR UNDERLAY
    sku 44PP
  • NATURAL CHALET SIDING 3/8"X4'X8'
    sku CHALETSID
  • MELAMINE & HARDBOARD
  • MDF FIBERBOARD 1/2"X 4'X 8'
    sku 12MDF
  • MELAMINE NOVA WHT #120 5/8"X4X8
    58MW
  • HARDBOARD WHITE 1/8"X 4'X 8'
    sku 18HW
  • PEGBOARD WHITE 1/4"X 4'X 8'
    sku 14PW
  • HARDBOARD STANDARD 1/4"X 4'X 8'
    sku 14HB
  • FORMPLY
  • FORMPLY ULTRAFORM 3/4"X 4'X 8'
    sku A107

Treated Lumber

  • PRESSURE TREATED
  • PRESSURE TREATED 1"X 6"X 5'
    sku PT165
  • PRESSURE TREATED 1"X 6"X 6'
    sku PT166
  • PRESSURE TREATED 1"X 6"X 12'
    sku PT1612
  • PRESSURE TREATED 1"X 6"X 16'
    sku PT1616
  • PRESSURE TREATED 2"X 4"X 8'
    sku PT248
  • PRESSURE TREATED 2"X 4"X 12'
    sku PT2412
  • PRESSURE TREATED 2"X 4"X 16'
    sku PT2416
  • PRESSURE TREATED 2"X 6"X 8'
    sku PT268
  • PRESSURE TREATED 2"X 6"X 12'
    sku PT2612
  • PRESSURE TREATED 2"X 6"X 16'
    sku PT2616
  • PRESSURE TREATED 2"X 8"X 12'
    sku PT2812
  • PRESSURE TREATED 2"X 6"X 16'
    sku PT2816
  • PRESSURE TREATED 2"X 10"X 12'
    sku PT21012
  • PRESSURE TREATED 2"X 10"X 16'
    sku PT21016
  • PRESSURE TREATED 2"X 12"X 16'
    sku PT21216
  • PRESSURE TREATED 4"X 4"X 8''
    sku PT448
  • PRESSURE TREATED 4"X 4"X 12'
    sku PT4412
  • PRESSURE TREATED 4'X 4"X 16'
    sku PT4416
  • PRESSURE TREATED 6"X 6"X 12'
    sku PT6612
  • PRESSURE TREATED 6"X 6"X 16''
    sku PT6616
  • PRESSURE TREATED 8" X 8" X 16'
    sku PT8816
  • TREATED DECKING 5/4"X 6"X 12
    sku PT54612
  • TREATED DECKING 5/4"X 6"X 16
    sku PT54616
  • MINI TIES 3"X 5"X 8'
    sku PT358
  • STRINGER P.T. 3-STEPS
    3SPT
  • STRINGER P.T. 4-STEPS
    4SPT
  • STRINGER P.T. 5-STEPS
    sku 5SPT
  • STRINGER P.T. 6-STEPS
    sku 6SPT
  • TRADITIONAL PT BALUSTER 2X2X48
    sku 01901

PWF, Survey Stakes & Shims

  • PWF
  • PWF 2"X 8"X 10'
    sku PWF2810
  • PWF 2"X 8" X16'
    sku PWF2816
  • SURVEY STAKES
  • SURVEY STAKE 1X2X36 1337 GRADE
    sku 6783526
  • SURVEY STAKES 2"X 2"X 4' 10/BDL
    sku SP22SS
  • SHIMS
  • 6" PINE SHIMS
    sku 4370003
  • WOOD SHIMS 42 PKG
    sku 5113865
  • CEDAR SHIMS 56 PK
    sku 6147094
  • SHIM COMPOSITE 32CT
    sku 8027211
  • CEDAR SHIM D GRADE 10/10
    sku CSD

Get a free estimate on your lumber, plywood & EWP materials.

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Knowles Building Centre
1 Queen Street 
Kapuskasing, ON P5N 1G4

TOLL FREE:
1-866-303-2251

PHONE:
705-335-2251

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