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Roofing/soffit vs eyebrow vents


I have a low slope 1920's craftman with composite shingles over tar and gravel and NO ventilation. I am removing both existing roofs and replacing with composite shingles. Is there a benefit to soffit vents vs "eyebrow" vents at the eaves?
Also, do you have an opinion on Ice and Water Shield vs. Tri Built underlayment?
Thank you,

Thank you for your questions.

I am a strong believer in good ventilation. Proper ventilation requires intake vents and exhaust vents. Intake vents are commonly vents in the eave soffits.  A good exhaust vent is a continuous ridge vent.

Good ventilation will make your home more energy efficient and less prone to mold.

A great source of ventilation information is

I am not familiar with eyebrow vents other than as a style of gable end vent. In that case, it would function more as an exhaust vent, fed by eave soffit vents. You can also cross-feed between opposing gable vents. Gable vents should not be used to feed ridge vents as it will not create good air exchanges.

Tri Built is a synthetic underlayment which is a good substitute for roofing felt. However, it is not a substitute for ice and watershield where ice and watershield is required by code. Ice and watershield is by definition a self adhering rubberized membrane.

I hope this helps. Feel free to contact me anytime at

Todd Miller


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Todd E. Miller


I am available to answer any questions pertaining to residential (or other sloped) metal roofing. I have knowledge of most available products but I like to approach projects from a "needs" basis and analyze them individually. Additionally, I can answer most questions about building ventilation.


I have worked for a manufacturer of residential metal roofing since 1980. I currently serve as President and have been involved with a wide variety of projects of all types across the world.

I am a board member for Metal Construction Association, Metal Roofing Alliance, the local United Way, our church, and our son's school.

Over the years, I have had articles appear in several trade journals including RSI, Remodeling, and Qualified Remodeler.

I have a B.A. in Communications and have also completed three years of training with the E-Myth Academy.

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