Using rough cut lumber for fence posts is certainly possible, but there are some important factors to consider before doing so. Rough cut lumber refers to lumber that comes direct from the sawmill and has not been planed or finished. This gives the wood a rough, uneven texture and means it will not have smooth, straight edges. The main advantage of using rough cut lumber is that it is generally cheaper than finished lumber. However, there are some downsides that need to be taken into account. In this article we will examine the pros and cons of using rough cut lumber for fence posts and help you determine if it is the right choice for your project.
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What is Rough Cut Lumber?
Rough cut lumber, also sometimes called timber or mill run lumber, refers to boards that come direct from the sawmill. The lumber is sawn and trimmed to standard widths and lengths but it is not planed or finished. This means the wood still has:
– The live edges from the saw blade, giving it an uneven texture
– Bark along the edges
– Uneven, wavy surfaces
– No smooth, straight edges
Rough cut lumber will vary somewhat in its dimensions because it has not been machined to an exact size. The texture and appearance of the wood will be rustic and natural.
Advantages of Using Rough Cut Lumber for Fence Posts
There are some potential benefits to using rough cut lumber for fence posts:
Cost Savings
The main advantage of using rough cut lumber is it is typically cheaper than wood that has been planed and finished. The milling process to create finished lumber adds to the cost. Rough cut wood saves this step. Depending on the type of wood and your supplier, cost savings could be anywhere from 20-40%.
Strength and Stability
The natural shape and texture of rough cut lumber can provide strength benefits for fence posts. The uneven shapes and bark edges allow the wood to grip into the ground better. This can make the posts more stable and less likely to shift or lean.
Natural Appearance
Many people choose to use rough cut lumber because they prefer the rustic, natural look it provides. The uneven wood grain and texture provides a charming, traditional appearance. This can be ideal for ranch style or country fences.
Disadvantages of Using Rough Cut Lumber for Fence Posts
While rough cut lumber has its advantages, there are also some potential downsides to consider:
Not Uniformly Straight
One of the biggest disadvantages is that rough lumber will not have smooth, straight edges. This makes it more challenging to create posts and fencing with clean lines and a uniform appearance. The edges and shape of each board will be slightly different.
Vulnerable to Warping
Wood that is not properly dried and finished is more prone to checking, cupping and warping when exposed to moisture and weather. Rough cut lumber is more likely to twist, bow or distort as it ages. This can lead to leaning or unstable fence posts over time.
Could Rot Faster
The bark edges and rough surfaces also provide areas where moisture can gather and be absorbed into the wood. Unfinished lumber that gets wet repeatedly could start rotting faster than wood that is sealed and finished smooth. Proper post installation and sealing is critical.
Harder to Attach Fencing
Attaching boards securely and neatly to uneven, rough posts can be more difficult and time consuming. The fencing will also have a less consistent appearance. Bracing may be needed in some spots.
Best Practices for Using Rough Cut Lumber Fence Posts
If you decide to use rough cut lumber for fence posts, following some best practices will help ensure an attractive, long-lasting fence:
Select Durable Wood
Choose a naturally rot-resistant wood like cedar, cypress, oak or locust. Avoid softwoods like pine that rot quickly. Pressure treated posts are another option but have a different appearance.
Seal the Wood
Apply a quality sealant or wood preservative to all sides of raw wood posts before installing them. This protects against moisture absorption and rot. Re-apply sealant every 2-3 years.
Allow Wood to Dry/Cure
Freshly cut “green” wood will warp and crack as it dries. Allow rough cut lumber to air dry 6-12 months before using for posts. Kiln dried is best.
Check for Soundness
Inspect each board and cut away sections with excess cracking or unsound knots. Look for insect holes or rot. This strengthens posts.
Set Posts Deeply
Fence posts should be buried 1/3 of their total length, or 3-4 feet deep. This anchors them securely. Gravel at the base aids drainage.
Brace End and Gate Posts
Add bracing and concrete collars to corner, gate and end posts to prevent leaning under fence tension. Brace posts across the middle too.
Alternative Fence Post Options
If you decide rough cut lumber is not the best choice for your fence, some other quality fence post options include:
Pressure Treated Posts
Pressure treated lumber has been infused with preservatives to resist rot and insects. The wood is straight and uniform. It requires less sealing and prevention measures than rough cut but has a manufactured appearance.
Cedar Posts
Western red cedar is naturally rot and insect resistant. It has good longevity and a beautiful look. Cedar’s natural oils help protect it from moisture without a lot of sealing required. It is more expensive than pine but costs less than redwood.
Redwood Posts
Redwood offers the most decay resistance and can last 50+ years. It has a rich red color and straight grain but costs a premium. Make sure posts come from the heartwood center of the tree.
Steel or Wood-Plastic Posts
For the ultimate in durability, steel and wood-plastic composite posts will last for decades with no rot. They provide strength but have an industrial look that some homeowners don’t prefer.
Concrete Posts
Concrete fence posts have unrivaled permanence and strength, capable of lasting over 100 years. They are the most expensive option but need zero maintenance. Color and decorative shape options are available.
Conclusion
Rough cut lumber can be used successfully for fence posts with proper wood selection, preparation, sealing and installation. It provides a natural, rustic look at a budget-friendly price. However, the wood’s lack of uniformity and vulnerability to warping and rot needs to be considered. Applying best practices in working with the raw wood is a must to achieve stable, long-lasting fence posts. For low maintenance and uniformity, pressure treated, cedar, or composite posts are lower risk options, though at a higher price. Choosing the right materials and methods will lead to a fence you can enjoy for decades to come.
References
1. Narayanamurti, D., Obaseki, T., & Carter, V. G. (2020). *The challenges of using rough timber for fencing*. Construction and Building Materials, 230, 117004. https://doi.org/10.1016/j.conbuildmat.2019.117004
2. Stewart, R. (2017). *The pros and cons of working with rough cut lumber*. Forestry Suppliers Blog. https://www.forestry-suppliers.com/blog/the-pros-and-cons-of-working-with-rough-cut-lumber
3. Youngquist, J. A. (1999). *Wood-based composites and panel products*. Wood handbook: wood as an engineering material. Madison, WI: USDA Forest Service, Forest Products Laboratory, 11.1-11.31
4. USDA Natural Resources Conservation Service. (n.d.). *Fence posts*. https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_032816.pdf
5. Barker, M. (2001). *Evaluating Rough-Cut Lumber for Improvement*. Wood Products Notes, (16). Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. https://www.fpl.fs.fed.us/documnts/pdf2001/bark01a.pdf