Types of Hardwood

Engineered
  • made with 2, 3, or 5 thin sheets laminated to form 1 plank
  • plies stacked in opposite directions is called cross-ply construction
  • cross-ply construction is dimensionally stable and less affected by moisture than 3/4” solid
  • with moisture, solid planks expand across width not down length
  • cross-ply advantage: plies counteract for plank growth, shrinking with humidity changes
  • its versatility allows it to be installed over concrete slabs or other places
  • installation methods include nailing, stapling, gluing, or floating
  • can be installed over a wide variety of sub-floors, and some existing floors
  • range: 1/4" to 9/16" thick
  • width: 2 1/4" to 7", mixed (3-5-7-inch planks installed side by side)
  • varying widths can change the appearance
  • lengths vary from 12" to 60“
  • made of layers - top finish layer is different species
  • domestic or exotic species: Oak, Maple, Hickory or Cherry
Solid
  • one solid piece with tongue and groove sides
  • unfinished and pre-finished 3/4” solid
  • moisture factor: sensitive to moisture
  • used in nail down installations
  • not recommended for below ground level, or over a concrete slab
  • can be refinished, or recoated, several times
  • natural product: expand and contract with season changes (moisture)
  • in winter heating months, moisture leaves the wood causing contraction and creating gaps between planks
  • in summer months, with high humidity, wood expands and gaps disappear
  • too much moisture causes planks to cup, or buckle
  • important to leave expansion around the perimeter
  • important to acclimate prior to installation
  • Oak: used for solid unfinished floors - several qualities to choose from
  • clear: no visual blemishes or knots, expensive
  • select and better: some small knots, little dark graining
  • #1 common, #2 common: more knots and dark graining
Longstrip
  • similar to engineered floors
  • several wood plies glued together
  • center core is softer, used to make the tongue and groove with finish layer on top of the core
  • top layer: any species made up of smaller individual pieces laid in 3 rows
  • 86" in length and 7 1/2" in width
  • 17 and 35 pieces making up the top layer of each board
  • each plank looks like a section already pre-assembled
  • designed for the floating installation
  • can be glued-down, or stapled down
  • extremely versatile – can go over a variety of sub-floors and grade level
  • come in a wide variety of domestic and exotic species
  • advantage: when damaged, they can be replaced easily