Calantha Flooring July 27th, 2017 - 18:25:21
Raw sheathing comes in 4`x8` sheets, most often installed as 3/4" thick plywood panels. This type of sheathing is adequate for spanning joist work spaced up to 24" apart. The sheathing is lain with the joints staggered in such a matter, that no two edge joints line up with adjoining sheets. It is very easy to install, requiring the least amount of labour. The sheets are fastened with either 1-1/2" flooring screws, or 2-1/2" nails, spaced about 8" apart. Although not required, it is a good idea to provide backers or supports under the joints, between sheets which run perpendicular to the framed floor assembly.
With reclaimed material waste factor is a huge variable. How much effort does the manufacturer take to give you a 100% usable product? Poorly milled with very little defecting and culling done on a solid wood floor that costs $6/sf and has a 15% waste factor actually costs more than a similar product that is milled better costing $7/sf with a 2% waste factor. That extra wastes costs more in shipping and labor to defect. This is one of the hardest things to demonstrate to a customer that the face value costs doesn`t necessarily represent the actual raw material cost unless one is truly comparing identical quality and specified products.
In the case of long span truss work, bearing lengths of at least 3" are quite common. Trusses span greater distances than framed floor assemblies and can be designed to span the entire building, eliminating center load bearing supports. They are moderately more expensive than framed floor assemblies, but provide a remarkably strong floor with little deflection or "bounce" to it. Another advantage to this type of structural system, is that utility installations can be run between the webwork components. Never allow trades to cut or drill into the members of a truss, for they are manufactured precisely for the loading conditions they will undergo during the life of the building.
For the second variable here is a controversial opinion: we do not end match our flooring which means there is no tongue and groove on the ends of the planks. Since we recommend our floor be glued down we say this is an unnecessary expense for the customer. End matching reduces the yield in production and raises labor costs. Most end match profiles are milled so loosely that they really don`t hold the floor in place anyway. The biggest benefit to the installer is that the plank can be cut in half in any place and reused anywhere without have to mate up to a complementary tongue or groove since the end is just square cut. This means all end trim pieces or any waste can be reused. Therefore on our engineered flooring product the waste factor is virtually nothing unless there are angles or radiuses to work around. We also help with waste factor by usually supplying a random width product so when one gets close to the end of a room they can plan the width combination patterns out to not have to rip much off the last row.