Ironwood is a natural, untreated board imported from Brazil. It is extremely dense, producing its heavy weight, longevity and generally attractive properties. On a feature and appearance basis, it is very similar to the more common Teak wood. Ironwood is a very dark board that naturally fades to a silver patina – within months when exposed to direct sunlight and over years when in a shaded area. Fading can be eliminated if periodically sealed, but the sealing process must be diligently maintained and so most docks are installed without a sealant.
Attributes
Aesthetically Appealing and is arguably the most naturally attractive decking for docks
Very Hard, up to three times harder than Red Oak
Long Lasting and naturally resistant to insect damage, rot, and other types of decay
High Load Bearing Capacity because of its high tensile strength and screw pull-through resistance
Maintenance Free and naturally resistant to mold. Requires no painting, sealing, staining, or waterproofing (unless desired to prevent fading)
Longevity is excellent and will remain smooth and splinter free for many years
Drawbacks
Heat Absorption is high which causes the surface to become relatively hot when exposed to direct sunlight
Poor Color Retention when no sealant is applied and will fade rapidly with direct sunlight exposure
Water Absorption will cause the boards to expand if submersed in water for extended periods