Engineered or Solid Hardwood?
Hardwood flooring is one of the few choices that will actually raise the value of your home and help it sell. Since hardwood floors are well known for retaining beauty, structural integrity and character for decades, they can be a powerfully persuasive selling point. The elegance and warmth of hardwood never goes out of style or wavers in its appeal. Whether you plan to keep your home for generations or sell it at a premium, hardwood flooring is always a good investment.
Solid wood is milled from a real hardwood species, making it the sole material used in the making of the flooring and lasts generations. Solid wood generally expands and contracts a lot more than engineered wood during climatic changes, especially extremes in heat and cold and rainy season. It’s resistance to moisture and heat is therefore unsuitable for applications in areas which are not environmentally controlled, damp areas such as below-grade installations and over radiant heat.
The standard thickness for solid hardwood is ¾”. For thin profile solid hardwood, 5/16″ is the standard. The planks are sawed in one of three ways, which affects the stability, and the price of the hardwood.
- Flat or Plain Sawed: by far the most commonly used cut. It contains more variations than the others.
- Quarter Sawed: cuts a log into quarters before it cuts the strips of wood to make hardwood flooring boards.
- Rift Sawed: cuts a log at a different angle than quarter sawed before it cuts the wood into hardwood flooring boards. Though it is more expensive than the other methods, it is also more stable, providing higher quality flooring.
Solid hardwood floor planks are made with a tongue and groove edge locking method which makes it easy to join the planks together to make a strong joint. One side of the board has a tongue and the other has a groove. The tongue interlocks with the groove to fit the boards together.
One of the advantages of solid construction is that most ¾” thick solid wood floors have about ¼” or 6 mm of wood above the tongue and groove meaning they can be sanded and refinished many times. If properly cared for, a solid hardwood floor can last for generations.
There are some potential disadvantages of solid hardwood. It cannot be installed below grade or over radiant heat. Most experts recommend not installing it over a concrete sub-floor.
Engineered or Stacked wood is bonded under heat and pressure. It is produced with three or more layers of HDF, MDF, with a layer of real hardwood as the surface layer. The additional base layers add structural strength to the product. This type of product is suitable in high-moisture areas or in areas of frequent temperature changes due to its “multiple-ply plank” manufacturing. Engineered hardwood is more resistant to both water and heat compared to solid wood. Engineered hardwood does not warp or cup during climatic changes and is a better choice for installation over radiant heat sources, damp basements, and at locations in rainy climates.
Engineered hardwood is made by gluing a real hardwood veneer to a core board made of either plywood or high density fiberboard. Because of this construction method, engineered hardwood is more dimensionally stable than solid hardwood. In other words it will not contract or expand as much due to changes in humidity or temperature.
Engineered hardwood has several advantages over solid hardwood:
- It can be installed on all grades, including below grade
- It can be installed over radiant heat
- It can be installed over a concrete sub-floor
- It can be floated
The number of plies used to create the plywood core may vary anywhere from 2 to 10, and while a 3 ply board is not going to be as stable as say a 5 ply board would be, this is not enough to be a deciding factor unless this flooring is going to be used over a radiant floor heating system. Generally speaking, the more plies in the plywood, the higher the price. A high density fiberboard core is more dimensionally stable than a plywood core.
There are three different ways of cutting the veneer for the engineered flooring that, along with thickness, has an impact on price. The three methods of cutting the veneer include:
- Dry solid-sawed: involves letting the wood dry out slowly with a low humidity level to keep moisture from inside the wood cells intact, reducing the risk of cupping. It is the most expensive type of engineered flooring, but looks and acts more like a solid.
- Rotary-peel: involves boiling the log for a certain amount of time at a certain temperature to prepare the wood. After the wood has been prepared, it is scraped from the log with a blade working from the outside in and then pressed flat. It typically has a plywood-like grain and can have issues with cupping and warping to try to revert to its original shape.
- Sliced-peel: involves boiling the log for a certain amount of time at a certain temperature to prepare the wood. After the wood has been prepared, it is sliced from the end and then pressed to create a veneer.
The thickness of the veneer ranges from 0.6 mm to 6 mm. The thicker the veneer, the more expensive the flooring is. For people who are planning to refinish the flooring at some point, it is important to consider the thickness because unlike a solid hardwood floor, the engineered type can only be sanded and refinished so many times. The thicker the veneer, the more times it can be sanded and refinished, however, it is still limited. Once installed, removing a vent to inspect the flooring from the side can provide an idea of the remaining thickness on the veneer.
One disadvantage of engineered floors is that they cannot be sanded & refinished if the wood floor has a veneer thickness less than 2mm; or if it is a hand scraped engineered floor, regardless of veneer thickness; however if the floor has a veneer thickness of 2mm or greater it can be refinished but is best left to a professional.
Engineered floor planks are made with either a traditional tongue and groove edge locking method or with a glue less click-lock edge method that requires no glue and allows the pieces to snap together to create a snug fit. This is the easiest do it yourself installation method.