Is hemlock wood good?

Is Hemlock Wood Good? A Detailed Guide for Woodworkers

As an economical and versatile softwood native to North America, hemlock has long been a popular choice among DIYers, woodworkers, and professionals alike. But with various wood species to choose from, how do you know if hemlock is the right material for your next carpentry project or woodworking endeavor?

This comprehensive guide covers everything you need to know about hemlock lumber, including its characteristics, uses, maintenance, and how it compares to other woods. Read on to learn all about working with this durable, eco-friendly softwood.

An Introduction to Hemlock Trees and Wood

Hemlock refers to several species of tall, conical evergreen trees in the pine family Pinaceae, native to North America. The most common species used for lumber are Eastern hemlock (Tsuga canadensis) and Western hemlock (Tsuga heterophylla).

Hemlock trees thrive in cool, moist forests and along streams. They can grow up to 130 feet tall and live for hundreds of years under ideal conditions. Their natural range spans the northeastern, north central, and western regions of the U.S. as well as southeastern Canada.

The wood derived from hemlock trees is classified as a softwood, but it is fairly hard and dense compared to other conifers. This lightweight yet strong wood has a coarse, uneven texture and ranges from pale yellow to reddish-brown in color. Freshly milled hemlock gives off a faint pine-like scent.

Thanks to its readily availability, affordability, workability, and natural durability, hemlock wood has become ubiquitous in construction and woodcraft. But how does it really stack up against other popular softwoods?

Key Properties and Advantages of Hemlock Wood

Hemlock offers a nice balance of virtues that make it so useful for a wide range of applications:

• Strength – Good stiffness and resistance to shock loads compared to other softwoods. Roughly 20% stronger than pine.

• Stability – Very stable and resistant to warping or cupping. Handles temperature and humidity changes well.

• Workability – Soft enough to be worked easily with hand and power tools. Nails, screws, and glues well.

• Affordability – Significantly cheaper than fine hardwoods. Costs 20-30% less than pine per board foot.

• Appearance – Distinctive grain patterns. Takes stains and paints decently.

• Rot resistance – Heartwood has fair natural decay resistance, though sapwood is prone to rot.

• Sustainability – Abundant, regenerating supply from responsibly managed forests.

And as you‘ll learn, these characteristics make hemlock highly suitable for a variety of commercial and hobbyist woodworking applications, both indoors and out.

Common Uses for Hemlock Lumber

Thanks to its well-rounded properties, hemlock wood has been popular for centuries as a construction material and for manufacturing. Here are some of its most common uses today:

• Framing lumber – Hemlock‘s strength, stability, and affordability make it ideal for wall, floor, and roof framing.

• Subflooring – More moisture-resistant than pine or fir, it holds up well underflooring.

• Roof decking – Used widely for tongue-and-groove roof boards under shingles and shakes.

• Exterior siding – With proper maintenance, withstands weather well as clapboard, board-and-batten siding.

• Interior paneling – Adds interesting visual texture for wall and ceiling paneling.

• Flooring – Durable enough for flooring if the wear layer is thick enough.

• Furniture – Used for chairs, tables, beds, and cabinets thanks to good working properties.

• Millwork – An economical choice for door frames, columns, trim, and moulding.

• Utility poles – Taproots resist rotting in-ground. Also used for poles in pole barn framing.

• Crates & pallets – Affordability makes it ideal for industrial shipping and storage crates.

In commercial logging, smaller hemlock trees and irregular grains go to pulp and paper production while larger, clearer stock is sawn for lumber.

Hemlock vs. Pine: How Do They Compare?

Like hemlock, pine is an abundantly available and affordable softwood used extensively in construction. But there are some notable differences between these two common options:

|| Hemlock | Pine |
|-|-|-|
| Density | Denser/harder | Softer |
| Strength | Stronger | Weaker |
| Stability | Excellent – resists warping | Prone to warping |
| Workability | Fairly easy to work, low tearout | Easy to work, smooth finish |
| Rot resistance | Moderate | Low |
| Cost | $$ | $ |
| Appearance | Distinct grain | Less distinctive grain |

While pine is slightly easier to work and stains more evenly, hemlock‘s density and stability give it the edge for structural applications like framing and flooring. Pine is better suited for interior use and furniture.

Hemlock vs. Cedar: Which Is Better for Outdoor Projects?

Western red cedar is a premium wood prized for its natural weather resistance, insect repellency, and beauty. But it comes at a steep price. So how does hemlock compare for outdoor projects?

|| Hemlock | Cedar |
|-|-|-|
| Density | Denser/harder | Lightweight |
| Strength | Stronger | Weaker |
| Appearance | Unremarkable grain | Rich color and grain |
| Weather resistance | Moderate | Excellent |
| Insect resistance | Low | Highly resistant |
| Price | $$ | $$$ |
| Best uses outdoors | Structural applications like framing | Siding, furniture, decking |

While cedar has superior longevity outdoors, hemlock can provide a more affordable alternative if properly maintained. Use cedar for exposed applications like siding and deck boards, and reserve hemlock for structural frameworks.

Key Characteristics of Hemlock Trees and Wood

To identify hemlock trees, look for these signature features:

• Flat, soft needles about 1/4 – 1/2 inch long
• Light green needles with two white lines underneath
• Delicate, lacy appearance
• Thin gray bark with deep furrows
• Small light brown cones just 1-11⁄2 inches long
• Pyramid shape with drooping lead shoot

The wood shares some characteristics with other pines but has a few distinguishing traits:

• Light reddish-brown to pale yellow color
• Fairly coarse, uneven grain
• Distinctive patterns like curls and wispy streaks
• Medium texture – less dense than hardwoods but harder than pine
• Diffuse porous structure
• Very subtle pine-like scent

Downsides and Disadvantages of Hemlock

Despite its advantages, hemlock does have some weaknesses to consider:

• Softness – Prone to dents, scratches, and wear over time. Not ideal for tabletops.

• Finishing – Absorbs stains unevenly. Requires grain filler for smooth painted finish.

• Decay resistance – Heartwood is moderately rot-resistant. Sapwood decays readily.

• Insects – Susceptible to boring insects like hemlock borer.

• Environmental impact – Not as ecologically sustainable as pine.

• Dryness – Can crack and splinter if too dry. Needs controlled conditions.

• Appearance – Lacks the rich grains and colors of hardwoods.

With proper selection, protection, and care, these disadvantages can be minimized. But for critical structural components, opt for a more durable wood.

Tips for Working With Hemlock Lumber

Here is some advice for crafting flawless projects with hemlock based on years of experience:

• Carefully hand-select boards. Look for vertical grain and dense growth rings.

• Cut hemlock with razor-sharp carbide-tipped blades for clean cuts. Keep other tools sharp.

• Always pre-drill holes to prevent unsightly splintering when nailing or screwing.

• Consider using coated fasteners and hardware for longevity outdoors.

• Apply sanding sealer before staining to prevent blotchiness. Test on scraps first.

• Use an oil-based primer when painting to block tannins from bleeding through.

• Allow for wood movement – hemlock expands and contracts with changes in moisture.

• Ensure proper moisture content (10-15% for interiors, 15% for exteriors) before installation.

Followed properly, these tips will yield professional-grade results. Paying attention to details like grain orientation and joinery will maximize hemlock‘s stability.

Finishing and Maintaining Hemlock Effectively

While durable for a softwood, exterior hemlock lumber still requires ample protection from the elements:

• Use high-quality, oil-based penetrating stains that soak into the wood grain rather than sit on the surface. Reapply every 2-3 years.

• Consider clear coatings like varnish or water-sealants for extra moisture protection.

• For paint, use high-quality 100% acrylic latex outdoor paint and prime first. Repaint biannually.

• Always top-coat end grains with water resistant sealants as they readily absorb moisture.

• Inspect exterior hemlock yearly for cracking, peeling finish, insect damage, and decay. Address issues promptly.

• Wash finished hemlock annually with mild detergent and water using soft bristle brushes. Avoid high pressure washing.

• Dispose of any gray, warped, splintered, or rotting boards right away.

With vigilant maintenance and refinishing, exterior hemlock lumber can deliver lasting performance in decking, fencing, framing and more. Ensure proper moisture levels are maintained indoors as well.

Sourcing Hemlock Lumber Sustainably

Hemlock is abundant in North America, but steps should be taken to source it responsibly:

• The Sustainable Forestry Initiative (SFI) and Forest Stewardship Council (FSC) certify sustainably harvested hemlock. Look for their tags at the lumberyard.

• Choose locally harvested hemlock to reduce environmental impacts from transportation.

• Support sawmills using cleaner, more efficient manufacturing processes. Ask providers about their practices.

• Consider alternatives like underutilized species if hemlock does not have ideal properties for a project.

• Reuse scrap hemlock for smaller hobby projects to limit material waste.

Following these guidelines will help ensure healthy hemlock forests for generations to come.

The Bottom Line on Hemlock Wood

For woodworkers looking for an economical, versatile softwood, North American hemlock is a prime choice thanks to its well-rounded characteristics. It delivers a good balance of workability, strength, stability, and rot resistance.

While it lacks the beauty and brawn of expensive hardwoods, with proper selection, joinery, and protection, hemlock can withstand decades of use both indoors and out. It‘s ideal for structural components, subflooring, framing, furniture and more.

Yet hemlock has its limitations, so use discretion when choosing it over higher-performing woods for critical structural applications. Combined with regular maintenance, hemlock can bring reliability and eco-friendly performance to your next woodworking project.