Installation Guide for Tower™ Roofing

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4. Roof Ventilation

It is imperative that your roof be vented appropriately. Without proper ventilation your roof is prone to condensation, mold, mildew, warping of the roof deck, and/or deteriorating building materials. All roof structures should be vented in order to allow heat buildup and moisture to escape the attic area. Vents are to be placed proportionately at the eaves, i.e., soffits (for cold air in) and at or near the ridge (for hot air out). Cross-flow ventilation should be allowed for in valleys where cathedral ceilings are in use. Metal, wood, or polymer ridge vents are all acceptable.

Proper ventilation should be in accordance with the local building code as a minimum, or in the ridge area use the guideline that there is 1 square foot of ventilation for every 150 square feet of attic floor space. If the ventilation is split between soffit venting and ridge venting, then the ridge venting guideline would be 1 square foot of ventilation for every 300 square feet of attic floor space. Whichever guideline (the one described or the building code) is more stringent should be used.

Important Reminder:
Always ensure that your roof has adequate roof ventilation regardless of the roofing material being used. If not, you may be at risk of serious structural damage.


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