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Looking for a good replacement option for exterior stair treads.
Must be full-depth, i.e. one plank per tread.
Originally 1" x 11" bullnose pine stair treads, which give the desired look. However, they have not held up to the elements for very long and need to be replaced about 6 years later. Yes, they were sloped to drain, and well primed all sides; it rains a lot here.
Just spent a few hours looking into composite deck companies convinced that someone must have a full-depth stair tread product. Couldn't find one; they all say to use multiple smaller planks - not an option as it is too informal for a front entry. Plus, you can't paint the composite lumber to match, despite what one of them claims.
Considered casting lightweight concrete planks. Anyone try this before? I can't seem to find a lightweight mix available in bag or small batches here in Portland, OR.
Any other options/suggestions/advice?