The durability of wood finishes is dependent on more than a few factors, however as long as the builder, contractor, architect and the owner of the house work hand in hand in maintaining them, doing so effectively is never a problem. First of all the architect needs to understand which design actually demands more maintenance in the long run. Certain designs like an extended roofline and trusses look very beautiful however they can require too much effort for successful maintenance. As for the builder, he needs to know which protection works best in eliminating mildew, fungus, and heat damage to the wood. This is essential so that the building contractor will be spared of additional expenses in treating the wood. As for the home owner, he should recognize the importance of keeping the finish on a continuous basis, which is typically three or five years for transparent stains. For semi-transparent stains, the maintenance span can be between four to six years. Finally, semi-solid stains need well-maintained finishes which can last from six to ten years, even longer. Most wood finishes require different measures of maintenance, so you have to make sure that you are applying the right sanding and cleaning techniques or stain application measures. Also, more often than not, a solvent base will need a primer.