Hardwood glossary

Your comprehensive guide to woodworking terminology, milling processes, and unique wood species.

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Acclimation

The crucial process of allowing newly purchased lumber to adjust to the temperature and humidity of its final environment before cutting or installation. Proper acclimation prevents warping, cupping, and splitting in finished furniture.

Pro Tip: Always let kiln-dried lumber acclimate in your shop for at least 72 hours before making your first cut.

African Mahogany

A highly sought-after exotic hardwood known for its deep reddish-brown color, straight to interlocked grain, and medium texture. It is a popular, cost-effective alternative to genuine Honduran Mahogany for custom furniture and cabinetry.

Pro Tip: Because of its interlocked grain, use sharp blades and take light passes when planing to avoid tear-out.

African Padauk

An exotic hardwood famous for its vivid, striking red-orange color that naturally deepens to a rich purplish-brown over time. It has a coarse texture and interlocking grain, making it a favorite for accent pieces and premium turnings.

Pro Tip: Use a UV-blocking finish to help preserve Padauk's brilliant orange-red color for as long as possible.

Alder

A moderately soft hardwood with a straight grain and even texture, ranging in color from pale yellow to reddish-brown. It is highly workable and takes stains exceptionally well, often used to mimic more expensive woods like Cherry or Mahogany.

Pro Tip: Alder is a fantastic choice for rustic cabinetry, especially if you plan to use a distressing technique.

American Cherry

A premium domestic hardwood prized for its smooth grain, fine texture, and rich reddish-brown color that darkens beautifully as it ages and is exposed to light. It is a top choice for high-end furniture and cabinetry.

Pro Tip: Cherry burns easily under friction; feed it steadily through your table saw or router to prevent scorch marks.

Aromatic Cedar

Also known as Eastern Red Cedar, this wood is famous for its pungent, natural oils that repel moths and insects. It features a beautiful, knotty appearance with a mix of pale yellow sapwood and deep purple-red heartwood.

Pro Tip: Leave Aromatic Cedar unfinished (unsealed) if you want it to retain its insect-repelling scent in closets or chests.

Ash

A light-colored, highly durable domestic hardwood known for its exceptional toughness, flexibility, and pronounced grain. Often light brown with darker streaks, it is widely used for tool handles, baseball bats, and bentwood furniture.

Pro Tip: Ash has a very porous, open grain similar to Oak, making it an excellent candidate for contrasting grain-fill finishes.

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Bamboo

Technically a highly renewable grass rather than a tree, bamboo is processed and pressed into dense, durable boards used as a sustainable alternative to traditional hardwood for flooring and cutting boards.

Pro Tip: Bamboo is extremely tough on cutting tools due to its high silica content; expect to sharpen your blades more frequently.

Bandsaw Mill

A type of sawmill that utilizes a continuous loop of toothed metal (a bandsaw blade) to slice raw logs into lumber. Bandsaw mills create less sawdust waste (kerf) than circular mills, yielding more usable wood per log.

Pro Tip: We utilize precise milling equipment at <a href='https://chattanoogahardwood.com/'>The Lumberyard</a> to produce perfectly dimensioned, high-quality boards.

Basswood

An exceptionally light and soft hardwood with a fine, even texture and pale white to light brown color. Because it rarely splinters and has very little grain pattern, it is widely considered the ultimate wood for hand carving.

Pro Tip: Basswood is too soft for heavy-use furniture but is perfect for intricate carvings, model building, and musical instruments.

Beech

A hard, heavy, and strong domestic wood with a straight grain and fine texture. Ranging from pale cream to pinkish-brown, it is highly resistant to abrasion, making it ideal for workbenches, cutting boards, and chairs.

Pro Tip: Beech can move significantly with humidity changes, so ensure it is properly acclimated and sealed.

Birch

A versatile domestic hardwood known for its light color, tight grain, and excellent strength. It is frequently used for high-quality plywood veneers, cabinetry, and internal furniture framing.

Pro Tip: Birch can look blotchy when stained dark; always use a pre-stain wood conditioner for an even finish.

Black Limba

An exotic African hardwood featuring a light yellowish-brown background intersected by dramatic, striking black and dark brown streaks. It is highly valued by luthiers for custom electric guitars and fine furniture makers.

Pro Tip: Limba is relatively soft for a hardwood, making it very easy to shape, but it requires a durable topcoat for protection.

Black Walnut

One of the most highly prized domestic hardwoods, Black Walnut is famous for its rich, dark chocolate-brown heartwood. It is dimensionally stable, shock-resistant, and the premier choice for luxury furniture and premium live edge slabs.

Pro Tip: The sapwood of Black Walnut is pale yellow; many woodworkers dye the sapwood to match the darker heartwood before applying a clear finish.

Board Foot

The standard unit of volume measurement used in the lumber industry. One board foot is equivalent to a piece of wood that is 12 inches long, 12 inches wide, and 1 inch thick (144 cubic inches).

Pro Tip: To calculate board feet, multiply Thickness (in inches) x Width (in inches) x Length (in feet), then divide by 12.

Burl

A tree growth in which the grain has grown in a deformed, highly irregular manner, usually resulting from stress or injury to the tree. Burls yield spectacular, swirling, highly figured wood prized by woodturners and resin artists.

Pro Tip: Burl wood is structurally unpredictable and should be stabilized with epoxy or resin if used for structural furniture.

Butternut

Often called ‘White Walnut,’ Butternut is a beautiful, light-colored hardwood with a rich, coarse grain and a very soft texture. It is a favorite among woodcarvers and is highly valued for interior trim and boxes.

Pro Tip: Because it is so soft, Butternut sands incredibly fast. Be careful not to alter your dimensions when using a power sander.

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Canarywood

A visually striking exotic hardwood native to South America, featuring a pale yellow-orange background heavily streaked with vibrant reds, purples, and browns. It has a fine texture and is excellent for turning and accent pieces.

Pro Tip: The vibrant colors in Canarywood can mute over time with UV exposure; use a high-quality UV-blocking finish.

Cedar

A highly resilient softwood known for its distinct aroma and incredible natural resistance to rot, decay, and insect damage. It is widely used for outdoor furniture, decking, fencing, and exterior siding.

Pro Tip: You do not need to pressure-treat cedar for outdoor use; its natural oils protect it against the elements.

Cherry

A premium domestic hardwood prized for its smooth grain, fine texture, and rich reddish-brown color that naturally deepens and darkens as it ages and is exposed to sunlight.

Pro Tip: To accelerate the natural darkening process of Cherry, place the sanded boards in direct sunlight for a few days before finishing.

Chestnut

A historically significant, lightweight hardwood with a warm, reddish-brown color and an open grain similar to oak. Due to the chestnut blight of the early 1900s, most chestnut available today is reclaimed from antique barns.

Pro Tip: Reclaimed wormy chestnut, featuring insect holes from its prior life, is incredibly highly prized for rustic furniture.

Crotch Maple

Wood harvested from the ‘Y’ intersection where a massive branch diverges from the main trunk of a Maple tree. The compression of the wood fibers creates spectacular, swirling, flame-like figure patterns.

Pro Tip: Crotch wood is notorious for warping as it dries. Ensure it is professionally kiln-dried before using it for a tabletop.

Custom Milling

The specialized process of cutting, jointing, and planing raw logs or rough lumber into specific, non-standard dimensions based on a woodworker’s unique project needs. We offer premium custom milling services.

Pro Tip: Always account for 15-20% material loss (waste) when calculating how much rough lumber you need milled into finished boards.

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Dimensional Lumber

Softwood lumber that has been pre-cut to standardized width and depth sizes (e.g., 2×4, 4×4, 2×6) primarily for use in structural home building and residential framing.

Pro Tip: A '2x4' does not actually measure 2 inches by 4 inches. After drying and planing, its actual dimension is 1.5 inches by 3.5 inches.

Douglas Fir

One of the most prominent structural softwoods in the world, renowned for its exceptional strength-to-weight ratio and dimensional stability. It is the premier choice for timber framing and exposed architectural beams.

Pro Tip: Old-growth, clear vertical grain (CVG) Douglas Fir is highly sought after for premium exterior doors and window frames.

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Eastern Cedar

A highly aromatic wood with a striking contrast between its pale yellow sapwood and reddish-purple heartwood. It features a fine, straight grain and is naturally resistant to decay.

Pro Tip: Eastern Cedar is the standard choice for lining blanket chests and high-end closets to repel insects.

End Grain

The highly porous surface of wood exposed when a board is cut perpendicular to the growth rings. End grain is incredibly durable and absorbs finish (and glue) much faster than face grain.

Pro Tip: End-grain cutting boards are superior to edge-grain boards because the wood fibers separate to allow the knife to pass, keeping your knives sharper.

Epoxy Resin

A two-part chemical polymer (resin and hardener) used to fill voids, stabilize bark inclusions, or cast spectacular ‘river tables’ using live edge slabs.

Pro Tip: Always seal the raw edges of your live edge slab with a thin coat of epoxy before doing your deep pour to prevent massive air bubbles.

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Figured Maple

A classification of Maple wood that displays extraordinary, three-dimensional grain anomalies such as curly, quilted, flame, or birdseye patterns. It is highly prized by fine furniture makers and luthiers.

Pro Tip: To make figured grain 'pop' (chatoyance), apply an oil-based finish or use a specialized dye technique before sealing.

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Hard Maple

An incredibly strong, dense, and heavy domestic hardwood with a fine, even texture. Its light color ranges from creamy white to pale yellow. It is the standard wood used for butcher blocks, bowling alleys, and basketball courts.

Pro Tip: Because it is so dense, Hard Maple is highly prone to burning from dull router bits and saw blades.

Hardwood Grading

The standardized system established by the NHLA used to classify the quality of a board based on the percentage of clear, defect-free wood it contains (e.g., FAS, Select, #1 Common).

Pro Tip: FAS (Firsts and Seconds) is the highest grade, ideal for long, clear cuts like dining tables or large cabinet doors.

Hardwood Species

Wood harvested from broad-leaved, deciduous trees (angiosperms) that lose their leaves in the fall. Examples include Oak, Walnut, Cherry, and Maple.

Pro Tip: Despite the name, not all hardwoods are physically 'hard.' Balsa wood is technically a hardwood, yet it is incredibly soft.

Heartwood

The older, central core of a tree trunk. Heartwood no longer conducts sap; it is structurally stronger, naturally darker, and much more resistant to decay than the outer sapwood.

Pro Tip: When building outdoor furniture, always select boards with high heartwood content, as sapwood rots very quickly.

Hickory

The hardest, heaviest, and strongest commercial wood available in North America. It features a stark contrast between its pale sapwood and dark brown heartwood, giving it a highly rustic, ‘calico’ appearance.

Pro Tip: Hickory is notorious for dulling blades quickly. Make sure your jointer and planer knives are sharp before milling.

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Kiln-Dried Lumber

Wood that has been scientifically dried in a specialized, climate-controlled oven (kiln) to bring its moisture content down to a stable 6-8% for indoor furniture building.

Pro Tip: Kiln drying not only stabilizes the wood, but the high heat also eliminates any insects or larvae living inside the log.

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Leopardwood

A heavy, dense exotic hardwood known for its spectacular, highly pronounced ray flecks that look like leopard spots. It has a rich reddish-brown background and a medium texture.

Pro Tip: The 'spots' in Leopardwood are much harder than the surrounding wood, which can make sanding it perfectly flat a challenge.

Live Edge Slabs

Massive, premium cuts of timber that retain the natural, organic outer edge of the tree directly beneath the bark. Browse our extensive inventory of high-quality live edge slabs for your next dining or river table project.

Pro Tip: Always remove the bark from a live edge slab before finishing it, as the bark will eventually shrink, dry out, and fall off on its own.

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Mantles

Thick, decorative, structural pieces of wood (often solid hardwood beams or live edge slabs) mounted above fireplaces to provide an architectural focal point in a home.

Pro Tip: When installing a thick solid-wood mantle, ensure the wood is properly kiln-dried, as the extreme heat from the fireplace can cause wet wood to crack violently.

Maple

A highly versatile domestic hardwood characterized by its light, creamy-white color, tight grain, and excellent durability. It is divided into ‘Hard Maple’ (Sugar Maple) and ‘Soft Maple’ (Red or Silver Maple).

Pro Tip: Maple does not absorb pigment stains well. If you want to change its color, use an aniline dye instead of an oil stain.

Mappa Burl

An exotic European wood famous for its chaotic, swirling grain and dense clusters of burl ‘eyes.’ It has a light-to-medium brown color and is highly prized for luxury veneers and resin art.

Pro Tip: Due to the erratic grain direction, Mappa Burl is best flattened using a drum sander rather than a traditional planer.

Moisture Content (MC)

The percentage of water weight inside a piece of lumber. For indoor furniture, hardwood must be dried to an MC of 6% to 8% to prevent the wood from warping, shrinking, or cracking in your home.

Pro Tip: Always use a pinless moisture meter to check your slabs before pouring expensive epoxy resin.

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New Heart Pine

Harvested from newly felled Southern Yellow Pine, this wood boasts a rich amber color, dense structural integrity, and a straight grain interspersed with classic knots. It is a highly popular flooring choice.

Pro Tip: Heart Pine gets harder and darker as it ages, making it an excellent investment for high-traffic floors.

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Olivewood

An incredibly dense exotic wood harvested primarily from agricultural olive trees. It is famous for its distinct, high-contrast, wavy dark brown streaks against a yellowish background.

Pro Tip: Olivewood has a very high natural oil content, making it the perfect choice for kitchen utensils and cutting boards.

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Pallets

Flat, wooden structural platforms used for shipping and transporting industrial goods. While often made of low-grade oak or pine, reclaimed pallet wood is highly popular for rustic DIY projects.

Pro Tip: Never use pallet wood for indoor furniture if the pallet is stamped with 'MB' (Methyl Bromide), as it has been chemically treated with toxic pesticides.

Pine Nickelgap Shiplap

A modern architectural wall cladding made from Pine. It features a specialized lap joint that automatically creates a perfect, consistent ‘nickel-sized’ gap between the boards when installed.

Pro Tip: Paint the wall behind your shiplap dark before installation, so the wall color doesn't show through the gaps.

Planing

The milling process of feeding rough-cut lumber through a thickness planer to create two perfectly parallel, smooth faces, bringing the board down to your exact desired thickness.

Pro Tip: Always joint one face of the board perfectly flat before sending it through the planer; a planer will not fix a bowed board.

Poplar

A highly affordable, lightweight hardwood with a straight grain and a color palette ranging from creamy white to pale green and sometimes purple. It is the industry standard for painted furniture and interior trim.

Pro Tip: Because it takes paint better than almost any other wood, Poplar is the ultimate choice for custom painted cabinetry.

Poplar Shiplap

A premium interior wall siding featuring an overlapping joint. Because Poplar is exceptionally stable and takes paint flawlessly, it provides a much cleaner, smoother finish than traditional pine shiplap.

Pro Tip: Use Poplar shiplap in bathrooms or kitchens, as its dimensional stability resists humidity better than pine.

Poplar Tongue and Groove

Lightweight Poplar boards milled with an interlocking edge (a protruding tongue on one side, a receiving groove on the other) to create seamless, hidden-nail paneling for ceilings and walls.

Pro Tip: Blind-nail through the tongue during installation to completely hide all fasteners.

Purpleheart

An incredibly dense, heavy exotic hardwood native to Central and South America. It is globally recognized for its striking, vivid purple heartwood, which darkens to a deep brownish-purple with UV exposure.

Pro Tip: If your Purpleheart loses its color during sanding, let it sit in the sun for a few hours—the heat and UV rays will bring the purple back to the surface.

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Quarter Sawn

A specialized milling technique where the log is cut radially (at a 90-degree angle to the growth rings). This produces incredibly stable boards that resist cupping and reveal beautiful ‘ray fleck’ patterns.

Pro Tip: Quarter sawn lumber is highly recommended for wide tabletops and flooring due to its superior dimensional stability.

Quartersawn White Oak

The gold standard for Arts & Crafts and Mission-style furniture. The quarter-sawing process reveals spectacular, iridescent ‘ray flakes’ (medullary rays) across the face of the incredibly durable White Oak board.

Pro Tip: Fuming Quartersawn White Oak with ammonia creates a rich, dark, authentic antique finish that highlights the ray flecks perfectly.

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Rainbow Poplar

A spectacular natural variant of Yellow Poplar where mineral deposits in the soil have stained the heartwood with vibrant, deep streaks of green, purple, black, yellow, and red.

Pro Tip: Use a clear, water-based polyurethane finish to prevent yellowing and keep the 'rainbow' colors vibrant.

Red Oak

A cornerstone of American woodworking, Red Oak is hard, heavy, and highly durable. It features a prominent, coarse grain and a distinct reddish-brown hue. It is widely used for flooring and traditional cabinetry.

Pro Tip: Red Oak is highly porous; you can literally blow air through the end grain of a short piece. Avoid using it for outdoor projects or cutting boards where moisture is present.

Rough Cut Lumber

Raw wood that has been sawn from a log but has not been planed, jointed, or surfaced. It requires custom milling before it can be used for fine furniture.

Pro Tip: Buying rough-cut lumber is significantly cheaper than buying surfaced lumber, provided you have the machinery to mill it yourself.

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S2S (Surfaced Two Sides)

A milling term indicating that a rough board has been run through a planer so that its top and bottom faces are smooth and parallel, but the two edges are still rough.

Pro Tip: S2S lumber still requires you to run one edge across a jointer and the other through a table saw before glue-up.

S3S (Surfaced Three Sides)

A milling term indicating that a board has been planed smooth on both faces, and one edge has been jointed perfectly straight. It is ready to be ripped to final width on a table saw.

Pro Tip: S3S is the perfect buying option for woodworkers who own a table saw but don't have the budget or space for a heavy-duty jointer.

S4S (Surfaced Four Sides)

Lumber that has been fully milled smooth on both faces and both edges. It is dimensionally perfect and ready to be cut to length and assembled immediately.

Pro Tip: S4S is the most expensive way to buy hardwood, but it is ideal for hobbyists who do not own milling machinery.

Sapele

A highly popular exotic hardwood from Africa featuring a rich reddish-brown color, a fine texture, and a stunning ‘ribbon stripe’ figure when quarter-sawn. It is the premier substitute for genuine Mahogany.

Pro Tip: Sapele is significantly harder and heavier than Mahogany, making it an excellent, durable choice for custom entry doors.

Sapwood

The living, outermost layers of wood in a growing tree, located just beneath the bark. It is generally much lighter in color than the heartwood and transports water and sap from the roots to the canopy.

Pro Tip: Sapwood is highly susceptible to fungus and insect attack; it is often trimmed away from premium hardwood boards.

Softwoods

Lumber harvested from coniferous trees (gymnosperms) with needles and cones, such as Pine, Fir, Spruce, and Cedar. They grow quickly, making them highly economical for structural framing and construction.

Pro Tip: Softwoods generally absorb stains unevenly; always use a wood conditioner before staining pine to prevent a blotchy finish.

Spalting

A spectacular wood coloration caused by fungi growing inside decaying logs. It creates striking, erratic black line patterns and contrasting bleached areas. Spalted Maple is incredibly popular for resin art and woodturning.

Pro Tip: Spalted wood is technically in the early stages of rotting. If it feels soft or spongy, stabilize it with thin epoxy before working with it.

Species-Specific Characteristics

The unique physical properties (hardness, grain pattern, color, workability, and rot resistance) inherent to a specific type of tree, dictating what that wood is best used for.

Pro Tip: Always check the Janka Hardness Scale before selecting a species for a high-traffic project like flooring or a cutting board.

Sweet Gum

A domestic hardwood featuring a fine, uniform texture and a beautiful color palette ranging from light brown to deep pinkish-red heartwood. It is highly workable and excellent for turning and boxes.

Pro Tip: Sweet Gum is notorious for severe warping and twisting as it dries; ensure it is properly kiln-dried and weighted down.

Sycamore

A moderately dense hardwood with a fine texture and highly interlocked grain. Quartersawn Sycamore is famous for its spectacular, densely packed ray fleck pattern, often resembling snakeskin.

Pro Tip: Because of its interlocked grain, Sycamore is incredibly difficult to split, making it historically popular for butchers' chopping blocks.

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Vacuum Kiln

An advanced, high-tech lumber drying oven that lowers atmospheric pressure to draw moisture out of thick slabs of wood rapidly and evenly, without causing the severe cracking associated with traditional heat kilns.

Pro Tip: Vacuum kilns can dry a massive 3-inch thick live edge slab in a fraction of the time it takes to air-dry.

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Walnut

A premium, highly stable domestic hardwood globally prized for its deep, rich, chocolate-brown heartwood. It machines beautifully, finishes flawlessly, and is the absolute pinnacle of high-end custom furniture.

Pro Tip: Avoid staining Walnut. A simple clear coat of hardwax oil or polyurethane is all you need to highlight its spectacular natural color.

Western Red Cedar

A lightweight, aromatic softwood famous for its incredible natural resistance to rot and insect damage. It has a beautiful reddish-brown color, a straight grain, and is the premier choice for premium exterior siding, decking, and saunas.

Pro Tip: Use stainless steel or hot-dipped galvanized fasteners when working with Cedar; standard screws will react with the wood's tannins and cause ugly black stains.

White Oak

An exceptionally strong, heavy, and durable domestic hardwood. Unlike Red Oak, White Oak has ‘tyloses’ that plug its pores, making the wood completely waterproof. It is the premier choice for whiskey barrels, boat building, and outdoor furniture.

Pro Tip: Fuming White Oak with ammonia reacts with its high tannin content, naturally turning the wood a deep, rich, antique brown without any stain.

Wood Grain

The longitudinal alignment, texture, and visual appearance of the wood fibers within a board. Grain direction dictates how the wood must be milled, glued, and sanded to prevent tear-out.

Pro Tip: Always run your boards through the jointer or planer 'with the grain' (so the blades smooth the fibers down rather than lifting them up) to ensure a glass-smooth surface.

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Yellowheart

An exotic South American hardwood famous for its incredibly bright, vibrant, and consistent yellow color. It has a fine to medium texture and is highly prized for intarsia, inlay work, and custom segmented woodturning.

Pro Tip: Unlike many colorful exotic woods, Yellowheart retains its bright color very well over time, especially when finished with a UV-resistant topcoat.