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Wood Types and Properties #4: Know your wood #4-Oak (red)

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Blog entry by Paul Sellers posted 05-17-2011 11:10 PM 1756 reads 0 times favorited 1 comment Add to Favorites Watch
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More on oak

I first worked with red oak in the Texas Hill Country back in 1987. At least that was the first time I knew of red oak as distinct from English oak. Whereas I love English and European oaks American red oak is not my favourite wood to work with and it’s not the prettiest, but it’s used  extensively for kitchen and bathroom cabinets throughout the USA and many European countries too. Red oak is known for its hard and heavy heartwood that has substantial strength and resilience in stressful situations and though less wet resistant than white oak, red oak lasts well in both indoor and outdoor furniture.

Upper right: an oak at Penrhyn Castle by the New Legacy School of Woodworking

Oaks grow to massive proportions and spread their branches widely. We take them for granted yet they are scarcely the measure of what they once were. None the less, I love to stand beneath their magnificent limbs and ponder the hand-hewn branches and stems converted to barns, ships, cathedrals and lowly pit props that undergirded the whole span of the industrial revolution and the ties that cross the empire’s railway passages around the globe. Imagine!

 

 

The pores in this end-grain view show two distinct periods of growth that form the early and latewood growth. The light band of spring launches the tree from dormancy and into the early summer when the cells are drastically reduced and the band darkens with more concentrated denseness and darker aspect of the ring.

Both red and white oaks are what we call ring porous hardwoods, which means that they have relatively large pores concentrated in earlywood and distinctly smaller pores in the latewood. These two bands form two halves to a single growth cycle commonly called the annual growth ring. Some hardwoods have pores invisible to the unaided eye whereas, as in the case of all the oaks, others have very distinct rings with clearly evident pores.

 

One of my red oak table designs

 

Red oak is less stable than its country cousin the white oak and many reject it for furniture making because of its coarse texture (open pores). That said, it is a primary source of furniture wood and should not be disregarded at all. I like to finish the wood with shellac or waterborne finish and then fill these open pores with a dark furniture wax polish. I designed this for the hand tool school. It’s project for students to make on the more advanced woodworking courses.

 

The heartwood is almost always light reddish brown with a definite pink blush that I quite like. It stains well to almost any colour with most brands of stain or dye, whether in the finish or applied independently as a colorant prior to other applied finishes.

 

 

 

 

Upper left is quartersawn oak cut to a slight tangent from perpendicular to the pith. Below right is quartersawn oak perfectly cut tangentially to the pith-cambium line.

 

 

 

 

 

The strong gold lines emanate from the central pith to the outer cambium and these rays are what we call medullary rays. Though this is a non-scientific term, it aptly describes the unfathomable richness of golden rays we see in all tangental faces of quartersawn oak.

-- Paul Sellers, UK http://paulsellers.com/paul-sellers-blog



1 comment so far

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Scott Bryan

27251 posts in 3284 days


#1 posted 05-18-2011 01:43 AM

Paul, thanks for sharing this. It is good to be exposed to background info on the woods that we use.

-- Challenges are what make life interesting; overcoming them is what makes life meaningful- Joshua Marine

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