Does a Western Red Cedar greenhouse need lots of maintenance?
A. No. If the timber is good quality Western Red Cedar it needs no maintenance. Left untreated it should last you 40 or more years. The natural oils in Western Red Cedar act as a natural preservative and act best if the timber can breathe. Putting “preservative” such as “Cuprinol” onto Western Red Cedar will seal the surface and stop the natural oils form working, The timber will then rot from the inside out. All timber treatments produce “fumes” that can be detrimental to sensitive plants. Any greenhouse needs an annual or twice yearly wash to let the light in through the glass. When washing the glass in a Western Red Cedar Greenhouse wash the timber at the same time.
