2015年9月9日星期三

Simple introduction of oak wood features




What is oak wood


Oak wood,with scientific name of quercus spp,is mostly growing the tropical zones of the Northern Earth, such as northern Americas, East Asia and East Europe.As China does not allow the logging of oak for commercial use, most of oak wood planks are imported from Russia, Europe and USA.



Oak wood density:750g/cm3

Oak wood hardness:1360psi




the features of oak hardwood:

1 heartwood of oak has huge difference in color with sapwood

heartwood is a little brown, between yellowish brown and dark brown;

oak sapwood is usually white color, with a little yellow;

2 oak wood has very clear wood annual rings, and very beautifule wood grain;

oak wood grain looks very mountains or sea waves, with small shooting rays of dark brown,

3 density and hardness is moderate high, compared with brazilian teak or ipe,

4 oak wood surface is very fine and smooth, and it is easy to get staining,




Usually, oak wood is divided in two two types: white oak wood and red oak wood. As white oak is not really white and red oak is not really red, it is very difficult for ordinary people to identify the difference of which oak and red oak.


The main difference in white oak and red oak is the application.

Red oak is mostly suitable for wood furnitures and wood doors,wood flooring;

White oak is usually suitble for wood barrel for wine,hardwood flooring.




the advantage of oak wood


1 oak wood has clear beautiful mountain wood grain, and the wood surface feels very fine and smooth;

2 is impelling toughness is very excellent, oak wood could be made into kinds of beautiful curving wood items ;

3 oak is very hard with high density, with good stability in dimension, thus it is very resistant against rotting and the lifetime of oak wood could be nearly a hundred years.

4 with its beauty in grain and high density,oak wood is a very good material for high end wood furnitures, both in european style and Chinese traditional style;

5 on account to its high hardness, oak wood is not easy to be sawn,sanded and processed like other wood, such as ash wood, elm wood.

6 oak wood is more and more precious now after the logging of oak wood in big amount in the recent 100 years.





The disadvantage of oak wood

1 there is very few amount of oak hardwood with high grades, most of the oak hardwood has big tree knots,cracks and color difference.

2 sapwood of oak is vulnerable to worms and borer;

3 oak wood, if not kiln drying properly, would shrink and get cracking very easily;

4 Oak wood, looks like ash wood or chestnut wood. It is difficult for people to identify oak wood, ash wood and chestnut wood.



Usually oak wood from France and Russia is top quality, with little knots, oak wood from USA is in the middle level, and european oak wood from european is of low grade, with lots of knots,cracks and color difference.

2015年9月1日星期二

Durability of engineered wood flooring

Durability of engineered wood flooring

 by Chancelier Wood Flooring

  www.artparquet-woodflooring.com

engineered wood flooring is made by wood top layer and plywood material. as the plywood structure is consisting of several layers of wood veneer pressed by high-power machines, engineered wood flooring is totally different from solid hardwood flooring, without one-direction of wood grain. in the aspect of shrinking & expanding with moisture, and the dimension stability, engineered flooring definitely has better performance than hardwood flooring. Besides, engineered wooden floors achieves the same impression of beauty for the wood grain as hardwood flooring, and it also provides same feeling of walking to people , as hardwood flooring.  
With same stability of laminate flooring and beauty of hardwood flooring, engineered wood flooring becomes more and more popular around the world now.

The factors to influence the durability of engineered wood flooring
Before we discuss the durability of engineered wood flooring, we need to know well the details of engineered wood flooring.

1 Wood species for the top layer 
With different wood species as top layer for engineered wood floors,  the hardness of engineered wood flooring will be very different, for example, birch is very soft and brazilian teak is almost the hardest wood, with janka hardness 1260psi and 3300psi. Birch engineered flooring thus feels much softer than brazilian teak engineered flooring. After several years, brazilian teak engineered flooring would look better and feel better than birch engineered flooring , as people walk on it with shoes for years.
as a result, wood species for engineered wooden floors is one of the factors to influence the durability of engineered wood flooring.

2 Quality of lacquer or oil for flooring coating
Most of the engineered wood floorings are pre-finished with UV lacquer or UV oil by the engineered wood flooring manufacturers. The quality of lacquer or oil coating is the most important factors to engineered flooring durability.
 If the quality of lacquer of oil is poor, the flooring coating will probably occur to these potential problem: 
   lacquer failure at parts of the flooring boards,
   lacquer cracking, 
   lacquer uneven surface, 
   lacquer de-bonding days after installation
With such lacquer problem, those engineered wood flooring undoubtedly needs reparing, or even are less any more.
On the other hand, with excellent lacquer quality, engineered wood flooring would be as good as new even after several years, without need for re-finishing for coating for 5-10 years.

3 Quality of plywood material
Plywood material has better stability in dimension than solid wood flooring, but the multi-layer plywood is made of several layers bonded by glue. So quality of plywood material and the glue quality for the plywood material would be the 2nd important factor to engineered flooring durability.
With installation on concrete flooring, the moisture in concrete flooring will have an effect on the back of engineered flooring year by year, although the concrete floor would be processed with waterproof treatment for wood flooring on top.
In some cold area, people will install engineered wood flooring above the under hearing system, which would be turned on in winter,then the floorings would be heated as well. The qualified plywood material for engineered wood flooring will not be glue de-bonding in such circumstances.
Those plywood materials which could pass the bonding strength testing ( soaking in boilding water for 2 hours),are qualified in such situation.

4 Good maintenance to the flooring
Although engineered wood flooring is new product with high technology,  its wood property still require people to use , maintain them as real hardwood flooring
   waxing every 6 months, 
   mopping without dipping water,
   no dragging for heavy articles on it,
   keep flooring and house as dry as possible
Without good maintenance, even the best quality engineered wood flooring will not have durable performance, and probably needs repairing several months after installation.

According to the above knowledge about the factors to durability of engineered wood flooring, we thus shall pay great attention to these factors before we make decisions during buying engineered wood flooring for our new houses.