Wood Flooring Overview
Many people are now considering hardwood flooring as an alternative to carpets, rugs, vinyl, stone or ceramic tiles. Hardwood flooring is made using timber from durable hardwoods such as oak and black walnut, or spruce or hard pine. And now hardwood flooring is easier to install than ever before. You can have it installed professionally, or via do-it-yourself kits.
Hardwood floors are made in two basic ways. Some are unfinished and are then sanded and polished once fitted, others are pre-finished in the factory for quick installation. Pre-finished hardwood floors have a polyurethane finish with added metal oxide finishes to increase their longevity.
Most solid hardwood floors are sold as 19mm thick planks. You can also get planks in 10mm and 8mm thickness. This kind of hardwood flooring is then installed using nails onto a wooden sub floor.
Although a popular installation method, tests have found it is more likely to suffer moisture and temperature degradation if fitted over a concrete slab. Hardwoods such as oak are susceptible to moisture and temperature changes because they expand and contract, changing temporarily the width of the grain. Experts say you should avoid installing hardwood flooring over concrete slabs unless the manufacturer guarantees suitability.
Pre-finished hardwood flooring can range in thickness because of the way it is made using layered veneers to create the finish. The level of thickness can vary between 8mm and 14mm. These levels can also depend on specifications and processes used by the individual manufacturer.
There are three basic processes whereby manufacturers create the veneer. They are the rotary peel, the sliced peel, and the dry solid-sawn. The rotary peel suffers problems whereby the wood veneer curls back to its original shape. It is popularly known as “face checking” and is a manufacturing defect which gives the hardwood a cheap, plywood–looking grain.
The sliced peel doesn’t suffer from the same issues as the rotary peel. However, it can splinter or crack due to the way it is submersed under water and then pressed flat during the veneer layering process.
Dry solid-sawn is the best process to use. The veneer layer is created in a similar fashion to the way solid hardwood planks are produced. The dry solid-sawn pre-finished flooring has an excellent look to it – much as you would expect from an authentic solid hardwood – and doesn’t suffer from “face checking” because moisture is never added to the wood.
Pre-finished hardwood is created by layering the veneer in stacks so that the grain of the wood in each layer is perpendicular to the other. Layering the veneer until the thickness required is obtained, each board is cut into the desired width. The boards are then given tongue or groove edges for easier installation and fitting. Finally, stain is added if necessary, and a finish. The finish will help to protect the wood against moisture or temperature change. Because the wood will expand and contract because of temperature and moisture change along the width of the grain direction, pre-finished hardwood flooring is seen by professionals as dimensionally stable.
You will notice that the grain of solid hardwood planks runs in the same direction. This means that they are less stable and are not suitable to concrete. Pre-finished hardwood flooring can be glued to concrete directly because of its inherent dimensional stability.
You will be able to check out samples of hardwood flooring – both solid and pre-finished at your local hardware store, DIY outlet, or flooring specialist. Now you’re armed with more information about hardwood flooring you are better prepared to look for the product that suits your needs.