How Long Do Wood Roof Shingles Last?
As we said the average life of a wood shingle roof is thirty to forty years and a good quality proeprly-installed wood shake roof will last twenty to forty years. However the life expectancy of the roof can vary depending on some of the following factors:
- Flashing material, installation quality, proper details
- How the shingles were installed
- How the wood shingle or shake roof is ventilated. For example wood shingles installed on solid plywood roof decking can be expected to have a shorter life than the same shingles installed over skip sheathing or spaced nailers that provide plenty of ventilation.
- The pitch of the wood shingle or wood shake roof (its slope)
- The wood shingle or wood shake grade or quality
- The wood shingle or wood shake roof’s exposure to overhanging trees or debris that may hold water on its surface
- The wood shingle or wood shake roof’s exposure to shade that may promote moss or lichens growth
- The wood shingle or wood shake roof’s sun and weather exposure
Besides selecting a durable wood, the most important factor is to make a determination of its ability to dry out from both the top and the bottom when wet. Two approaches are used:
- Create a system of spaced sheathing above the solid sheathing using vertical and horizontal battens
- Use a breathable underlayment applied over the sheathing
Click here to read how long other types of roofing systems last.
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