Alder Knotty 4/4 Lumber Random Widths, Random Lengths

Ratings Snapshot
4.5
out of 5
5 (11)
4 (2)
3 (1)
2 (1)
1 (0)
Would recommend this product?
93.3%
Alder Knotty 4/4 Lumber

$2.79 /Board Feet

1-99 $2.79 /Bd. Ft.
100+ $2.09 /Bd. Ft. (25% off)
Tip: mix or match for your best price! Details

The actual footage you receive will be slightly different from what you order, therefore your final billed amount will be a little different. This is because we hand select your lumber from inventory of various widths and lengths - every board is unique and different in size (except thickness).
Read this for more info

Board Foot Cheat Sheet
Learn How To Estimate Lumber Needs
Tips & Techniques

Video Tutorial

Learn about woodworking with Alder
hardwood lumber sizes
Alder lumber comes in random widths and lengths, with a uniform thickness.
Here's what you can expect:
13/16" Thickness

Also known as 4/4, S2S.
Surfaced 2 sides (S2S) from rough sawn lumber. You should be able to yield approximately 3/4" thickness after you flatten, plane, shape or sand your project parts to fit your project

Learn more in our blog: "What Does 4/4 Mean in Lumber?"

4" to 6" Widths

This is the range of widths that are usually available in this wood.

  • Price shown is for a random selection of widths within this range.
  • Request special width selection using the "Minimum Size Request" box in the order form.
  • Edges are rough sawn
  • Straight edge ripping service is available for a small fee

6' to 14' Lengths

This is the range of lengths that we might have in stock at any given time. But there are some things to know:

No Minimum Purchase
We're easy to buy from! That means we can cut you a short piece(s) from long boards if you want.

Length Shipping Restrictions

Moderately durable, yet lightweight with an even color, you can use alder for furniture and cabinetry. The tight grained wood is easy to work and goes easy on your tools. Use a clear finish to achieve a mild color that's darker than maple yet lighter than cherry; or stain it for a rustic 'old world' look as this wood takes stain unevenly, which creates a dramatic effect for those with that taste.

About Alder (Alnus rubra)

Weight

2.33

lbs /Bd. Ft.
-34.92% lighter than red oak (3.58 /bd. ft.)
Hardness

590

Janka Rating
-54.26% softer than red oak (1290 psi)
Density

0.41

Specific Gravity
-35.94% less dense than red oak (.64)

General Workability
Good 4/10
Red Oak

Wood Texture
V. Fine 2/10
Red Oak

Ease of Finishing
Good 4/10
Red Oak

map of where Alder tree grows
Alder is a domestic wood from North America

Lumber contains tight, sound knots throughout. A soft, relatively low-strength, straight-grained, even-textured wood. Works well with hand and machine tools, but sharp cutting edges need to be maintained to prevent tearing the grain. The wood is rarely wider than 6 due to the small size of the trees.

color of Alder
Color Range
Pale Yellow to Reddish Brown with dark knots
the Alder tree
What's The Tree Like?
A relatively small tree, reaching about 50ft in height and producing a trunk in diameter up to 15".
other names for Alder
Other Names
Alder, Oregon alder, Pacific coast alder, Red alder, Western alder
uses for Alder
Some Typical Uses
Rustic furniture, entry doors, moldings, turning, carving, toys, plywood, veneer, cabinets, musical instruments.

lumber random widths Random Widths
You will cut and/or glue to create the sizes you need
rough sawn vs surfaced lumber Surfaced Smooth S2S
We buy rough sawn lumber and have it surfaced 2 sides (S2S) so you're ready to work
rough sawn vs surfaced lumber Kiln Dried
We stock kiln dried lumber and store it in a protected warehouse
rough sawn vs surfaced lumber 83%+ Clear
Unless stated otherwise, we stock Select & Better graded lumber that's at least 83% clear one side
lumber thickness Lumber Compared
Various lumber thickness as compared to one another
  1. Decide how much board footage you need
  2. Factor in enough to work with! You'll want to arrange grain patterns, sort color, fix mistakes, run test cuts, make finish samples, etc.
  3. Lumber comes in random widths and lengths. If you need special size considerations, please let us know by using the "Minimum Size Request" box in the order form or by confirming your needs by phone or email.
  4. Expect your final amount of footage to change slightly. Buying by the board foot is an exercise in estimation, therefore we don't know the precise amount of footage you'll receive (and be billed for) until we physically select the wood for your order.
  5. We want to get your order right! So we may need to contact you for clarification. Please use a good phone and email during checkout.

This is the unit of measurement for hardwood lumber when it's bought/sold in random widths and random lengths.

Board footage is a measurement of volume, and it's abbreviated Bd. Ft.

One board foot is equal to 144 cubic inches.

board foot formula

It's a fraction that refers to rough (RGH) sawn thickness of lumber, and it tells you approximately how many quarters of an inch make up the thickness.

Surfaced lumber is thinner because it started out as rough sawn but it's been planed smooth. Planing removes thickness.

Rough Sawn (RGH) Surfaced (S2S)
4/4 ~1" 13/16"
5/4 ~1-1/4" 1-1/16"
6/4 ~1-1/2" 1-5/16"
8/4 ~2" 1-13/16"
12/4 ~3" 2-13/16"

Unless otherwise specified, our lumber is "Surfaced 2 Sides" or S2S for short.

Check out our article if you want the full explanation.

If you can cut your own pieces to size, here's how we can help:

  1. Enter requirements into the order form where it says, "Minimum Size Request"
  2. Tell us what you want to acheive or make
  3. You will receive wood that can yeild what you need. (You will create the final size)
  4. We may need to contact you for clarification

You will cut and/or join your material to create the finished sizes you need. We'll pick out wood that will give you enough to do that. For this reason, the final amount of footage you receive in your order will be slightly different, and your final billed charge will be different.

If you want to only buy pieces of an exact size, that will be sold differently. Please contact us for a custom quote.

Sadly, wood cannot be 100% guaranteed to be clear on both sides all the time. Most of our lumber is graded "Select" and better, which means it's at minimum 83% clear on one side.
Hardwood grades explained

Customer Ratings & Reviews

15
Ratings Snapshot
4.5
out of 5
5 (11)
4 (2)
3 (1)
2 (1)
1 (0)
Would recommend this product?
93.3%
4.5
out of 5
5 (11)
4 (2)
3 (1)
2 (1)
1 (0)
Would recommend this product?
93.3%
15 Total Reviews
March 13, 2017
5 out of 5
owner
Review by  horace from litchville nd
Just the freight
Verified Buyer
Recommended
November 1, 2016
5 out of 5
First time order
Review by  Kevin  from Fort Worth, Texas
My first time to order with woodwoekerssource.com, and at first I was a bit uncomfortable, due to orders with other companies. After placing and receiving this order, I will be doing more. Pricing was great, I wanted 20 board feet, not a problem, shipping was very quick, and packaged to be damage free. Very pleased, definitely five stars.!! They also follow thru with email updates.
Verified Buyer
Recommended
August 18, 2016
5 out of 5
Wyowoodsmith
Review by  Wyowoodsmith from Hulett, Wyoming
I had drawn up the tables for my "personal" project, the material list included an extra 3bf. of knotty alder, the shipment had included 4, 24" pcs, this would have been alright, but all 24" pcs had split's half way, I contacted WWS and Kirk immediately ask what could he do to complete my project, the other 4 bf. was shipped the next day- nothing but first class customer service, this woodworker won't order from any other supplier, every order has been much better than any that could be found within 400+ miles- thanks very much guys, pictures to follow when the finish is applied
Verified Buyer
Recommended
April 15, 2013
5 out of 5
Knotty Alder 4/4
Review by  Chas G. from Cresco, Pa USA
The lumber recieved was of better quality than I expected. Packaging was excellent and wood was straight and none cupped. I can't get this type in Pa. so I had to order online and was hesitant. I will have no worries ordering again.
Recommended
March 20, 2013
5 out of 5
impressilve boards
Review by  DW from ,
I'm really happpy with this load of wood. The boards were all very uniform in size and quality. I was especially impressed with the length of each board. There won't be much waste when cutting the parts for the kitchen island I am planning to build with this wood. Thanks again for great quality and affordable pricing.
Recommended
March 18, 2013
5 out of 5
Always great wood
Review by  Dale from Rio Rancho, New Mexico United States
Am pleased with the lumber as always. Great service, delivery and price. I have always received a great selection of lumber every time I have ordered from Woodworkers Source.
Recommended
15 Total Reviews
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