In areas of high humidity where solid sheathing is required:
Following are 4 different suggested methods of application to increase longevity:
- Apply Certi-Last® pressure-impregnated treated shakes or shingles directly to the sheathing.
- Apply vertical strips over the sheathing in alignment with the rafters below, then place horizontal furring strips on top of the vertical boards. (See Figure 22a).
- Apply horizontal furring strips to the deck, spaced at the exposure of the product.
- Use a continuous ventilation product beneath the Certi-label™ roofing material (See Figure 22b).
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Note: Good ventilation is essential.
Ridge and soffit vents are recommended. |
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| Note: the above figures are depicting a shake application
- Do not interlay shingles with felt |
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