Lundy Flooring July 19th, 2017 - 19:49:45
One drawback is that this type of floor requires special hanger systems designed for the joists, to enable them to be hung from each other or against beams/bearing walls. Manufactured joists are becoming a popular flooring system, for they are relatively cheap, reduce labour time and provide adequate support. However, builders need to familiarize themselves with its installations, for poor installation can cause severe structural damage to the joists. A good example is a three point, center bearing joist, left with the top chord uncut, which can potentially fail or pull apart, over the center bearing point.
Truss floors are simply that. They are constructed from small dimensioned lumber, interconnected in a webwork pattern by the use of metal or wood plates. Occasionally, the trusses will be built on site, utilizing plywood plates to connect the webwork together. Generally they are installed 24" apart, either suspended on bearing walls or beams, or installed with plywood trim or rim joists around the perimeter. Strapping is installed on the bottom side, to prevent turning in place, which is a common ailment for deep truss components.
Most commonly installed are interlocking sheathing panels. This type of sheathing is generally 5/8" thick, and manufactured as either plywood or aspenite (commonly referred to as "chipboard") in 4` x 8` sheets. The sheets come with the long edges designed to interlock with a tongue on one edge, and a grove on the opposing edge. They are installed by simply pushing or pounding the sheets together, and nailing or screwing them to the joist work, in the same manner as raw sheathing. It is often the cheapest to install.
So, a top quality oak engineered flooring will look the same but will it actually last as long?. How long a floor will last is mostly down to something called its `wear layer`. The part of the floor that is classed as the wear layer is from the surface of the board down to the tongue and on a solid oak board this would be around 5-6mm. Now, the wear layer on engineered wood flooring is the top layer of oak. So if you purchase an engineered oak flooring which has a 5-6mm solid oak top layer it will result in the flooring lasting just as long. In conclusion if you want an engineered flooring that is going to last as long as a traditional solid oak floor then make sure it has a nice thick top layer of wood, ideally 5mm+.