Green Oak

Material Type:
Hardwood

Also Called:
English Oak, Pendunculate Oak, Common Oak, Sessile Oak, Durmast Oak

Durability Notes:
The heartwood of European oak is durable and highly resistant to preservatives. The sapwood, however is vulnerable to powder-post and common furniture beetles. European oak is a good alround performer.

Seasoning:
The drying and seasoning of Green Oak is dependant on a number of factors; the speed in which it is processed after felling and logging, the method of drying and the specific kilns or location (if air dried). Generally the care taken by those processing the wood will have an impact on its drying and seasoning. As an overview; Green Oak - Drying is slow, with a tendency to check, split, warp and honeycomb; shrinkage is high. Movement in service is medium. Please note that all wood is liable to move when in service plus there can be dimensional change. The extent of this will depend on; the stability of the species itself, the conditions it is exposed to, the coating, decoration and protection. You will find more information about the suitability of this wood, for any proposed application, by using our interactive system and the filters shown.

Properties:
Oak is fairly hard, heavy and dense, with high crushing and bending strength, low stiffness and resistance to shock loads. It is very good for steam-bending. It is fairly hard to work with hand tools, with a tolerable to severe blunting effect. Pre-drilling is advised for nailing and screwing. It turns adequately and is good for gluing. Oak is good for painting, staining, oiling, varnishing and will take a high polish. The tannin content may corrode ferrous metals, particularly when exposed externally - the tannin can also cause staining to adjacent surfaces.

Typical Uses:
Green oak is typically used for structural applications such as beams, lintels, trusses and Oak framed buildings. It is normally of a character grade and will have (and may develop) splits, blemishes and large knots. As fresh 'Green' timber this will have a high moisture content and move considerably once in service.

Spiritual Properties:
'Mighty oaks from little acorns grow' goes the quote. This tree inspires us to be strong in body, mind and spirit. It is a sacred and revered tree representing endurance, power, protection and authority.

Moisture Content:
Varies - can be as high as 70% (down to around 20%)

Sustainability:
Considered as of least concern by The IUCN Red List of Threatened Species (last assessed in 2007)

Wood Worker's Thoughts:
The high moisture content improves workability but makes it heavy to handle - very good nailing and fixing, again due to the moisture. Will inevitably move, twist, warp as it dries out adding to the character of the wood.

Commonly asked questions about Green Oak Wood

Is Green Oak a hardwood or a softwood? Green Oak is a hardwood. It is the same for; is Green Oak hardwood or softwood? - Green Oak is a hardwood.

Most groups/families of species share the same characteristics but this normally relates to their life as plants. Individual species do not always share the same characteristics as their relatives, in terms of the wood. Many factors influence how we use the wood and what we use it for, including where it grows, how it is forested, how it seasons/dries, etc. The answers to the following common questions, therefore relate to this particular species/wood and not the Oak family as a whole. Even more specific – our answers relate to the wood (as we know it) in its form as a useable resource.

What colour is Green Oak? Green Oak can be described as brown, light brown, yellow/brown

Is Green Oak good for outdoor use? or is Green Oak good for exterior use? Green Oak is most suited for exterior/external use. Green Oak can be used as an exterior/external timber (without treatment).

Whether the wood is naturally durable or not we would still recommend that it is decorated and/or coated with a suitable product to provide protection and/or maintain its appearance. This even applies when using the wood internally as, even subtle, changes in temperature or humidity will affect the wood. This will depend on the application/purpose of the wood and the user’s desired appearance. We also recommend that a recoating, care and maintenance programme is adhered to, for the life of an exterior wood. Wood cannot rot if it is kept dry – coatings and decoration can provide this protection. All of that said there are many durable timbers that are often left to weather naturally and will last for many years untreated/coated – movement and visual changes will occur but this is sometimes the desired effect. All wood is hygroscopic (it 'wants' to be in tune with its environment) it will therefore take on water from moisture in the air (or when directly exposed to or submerged in water) and ‘release it’ when dry or exposed to heat. This, inevitably, results in movement and dimensional change. For more about moisture in wood please click here - Moisture in wood