Specification Sheet #7210 - Weathered Mushroomwood

Species	Mixed Species. May include Cypress, Cedar, Hemlock, others.
Source	Mushroom growing facilities from different locations in North America
Metal/Holes	Nails and fasteners are removed or occasionally cut flush or broken off. Weathered Mushroomwood will generally have some nail holes, but few, if any bolt holes. Staining around holes is common.
Knots	Unlimited knots; some tight, some fallen out
Checking/Cracks	Unlimited as long as board is sound; many boards have dark checking and weathering.
Grain Pattern	Mixed
Moisture Content/Stability	Air-Dried (usually dry to very dry). Weathered Mushroomwood is generally much more stable and less prone to shrinkage than is green lumber.
Standard Dimensions	a) Thickness: 1" (actual: 5/8" to 4/4"); b) Widths: 4", 6" and 8" (other widths may occasionally be available); c) Lengths: 1' increments from 4' to 16'.
Weight	Depending on species mix. Typically, approximately 2.5 pounds per board foot
Surfacing	Weathered (degree of weathering varies); face is generally extremely weathered with raised grain, feathered grain and/or very deep weathering in the soft grain of the material. Weathered Mushroomwood colors vary; a range of browns is much more common than grays. Mushroomwood colors generally range from some light browns to primarily darker browns and some gray or black streaks. One of the unique features of Weathered Mushroomwood is the variety of colors found therein. Many boards will have two or more shades of colors. As a result, Trestlewood generally does not offer a color sort which does not allow for some latitude in color provided.
Mushroom Spores	Weathered Mushroomwood was originally used in the process to grow mushrooms. It is very likely that the wood came in contact with mushrooms and their spores. It is possible that spores still exist on the wood and that the spores would grow if installed in a moist environment. It is important that mushroomwood not be installed into a moist environment, including the interior of a house that is not properly ventilated.
Appearance Variation	Boards can vary in appearance from piece to piece and even within a piece. The characteristics described on this specification sheet generally apply to each board's featured face. The opposite face and edges can differ from the featured face in texture, coloring, and other characteristics unless otherwise noted. Weathered lumber / barnwood will have at least one weathered face. The opposite face and edges can be any combination of weathered and fresh-sawn. If weathered, the weathering will often be different (amount, mix of colors, etc) than on the featured face.
Other	Weathered Mushroomwood can be very brittle and may split easily. Special care, such as pre-drilling holes for nails, is advisable.