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Roofing/Attic ventilation


Steve Stahl wrote at 2010-01-14 22:01:46
Stan couldn't be further from the correct answer. Tile roofs need ventilation as do most other types of construction. O'Hagin, Inc. is a company who makes ventilation for tile roofs. The vents are shaped like the tiles and therefore blend in with a little painting. Not only does ventilation cool your attic but it also allows the moisture that we all breath out, that is given off by our cooking, and that rises from our showers and baths to escape. Warm air rises and warm air holds more moisture than cold air does. Proper attic ventilation helps this moisture out of the attic and keeps mold from forming on the underside of the plywood decking. Innorthern climates frost can actually form on the underside of the roof decking and in extreme cases even on the sheetrock on vaulted ceilings. I to come from a line of roofers and I also started roofing in the mid seventies. One thing I learned in my years of roofing is that there is always new things that I can learn the longer I'm in this field. Most of the city building departments have adopted standards that set the attic ventilstion needed as 1 square foot of "Net Free Area" for every 300 square feet of ceiling area with 1/2 of the ventilation as intake in the soffits or low on the roof and 1/2 as exhaust usually along the ridgeline such as the ridge vent that Lou originally had. I'm sure that Lou can call their building department and ask for the code enforcement personel and get proper requirements for that city. Steve who is also a roofer and proud to be one. Austin, Texas

justwin wrote at 2010-08-02 19:30:05
Its bull. I have a concret tile roof in Vancouver and its so hot you can't stand still on it. The hot air is trapped and leaks out the soffit. Roofers here are installing ridge vents now with a huge difference in temperature  

spaulf wrote at 2013-07-31 15:53:49
Florida Building Code - SECTION 1203 VENTILATION

1203.2 Attic spaces.

Enclosed attics and enclosed rafter spaces formed where ceilings are applied directly to the underside of roof framing members shall have cross ventilation for each separate space by ventilating openings protected against the entrance of rain and snow. Blocking and bridging shall be arranged so as not to interfere with the movement of air. A minimum of 1 inch (25 mm) of airspace shall be provided between the insulation and the roof sheathing. The net free ventilating area shall not be less than 1/300 of the area of the space ventilated, with 50 percent of the required ventilating area provided by ventilators located in the upper portion of the space to be ventilated at least 3 feet (914 mm) above eave or cornice vents with the balance of the required ventilation provided by eave or cornice vents.

Exception: Attic spaces, designed by a Florida licensed engineer or registered architect to eliminate the attic venting.

As an architect in Florida, I would never NOT have attic ventilation. Bad advice to allow it to go unvented.


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Stan Skarbek


I`ve been in roofing for 30 years. I`m a roofing contractor in California. I have in depth expertise in residential roofing, especially wood shakes and shingles, asphalt composition shingles, and to a somewhat lesser extent with hot tar systems, tile, and all the other residential systems on the market.


ROOFING..HISTORY........ My father was a roofing contractor in the 60's and 70's. I started roofing in 1972 when I was 18 years old, in Encinitas, California. Since 1975, I've been in San Jose, California. I earned my contractors license in 1977, when I was 23 years old, and immediately started a company. I did great on the roofing side of the company. The company grew very large, with my focus on the residential repair and reroofing market. Unfortunately, within 3 years my lack of business management education was shining through. I was bankrupt and I lost everything. In 1981, at 27 years of age, I partnered with two other men to start a new roofing company. Again, we did great on the roofing side, and the business grew, but we weren't doing very well managing the business. I had learned much during my experience with the first company, but I had more to learn. We sold the company in 1983 when I was 29 years old. During those two businesses, I was learning "Business Management" the hard way. After we sold that second roofing business, I dabbled in two other industries for four years, before picking up my roofing tools again. During the late 1980's I recieved some actual business education thanks to West Valley College of Saratoga, California. CURRENT..ROOFING..INVOLVEMENT........ I started my current business in 1990 and I'm pleased to say that I have both the roofing side and the business side all figured out now. I've done well in San Jose over the last 17 years. Maybe "30" is the age where you get your head screwed on straight, eh? A little maturity, a little bit of learning from past mistakes and a whole lot of "Business Management" textbook study? And out pops a healthy business. I've been keeping the business fairly small, doing what I do best and working with people with whom I actually enjoy doing business. I have a strong reputation around San Jose for being able to figure out problem leak situations. I do roof inspections and repairs. My focus is composition shingles, wood shakes, tile and hot tar systems. ABOUT..MY..FAMILY........ My wife and I have been married 31 years, (since 1975) and we are very much in love. We have 4 sons, born between 1977 and 1982. They've all done roofing at various times. The oldest graduated from Stanford with an Master's Degree in computer engineering. He works at Paypal. The second graduated from Vanguard University with a BA in Business Management. He started his own roofing company. This year he's gone back to school at Santa Clara University to get his law degree. One of my twin sons has an Economics degree from San Jose State University. He's received much acclaim for his economics work and his work has been published in economic journals around the world. He's currently in the PHD program at George Mason University. The other twin is the most courageous man I know. He recently won a terrible battle with cancer. It was a worse experience than you can imagine. It was an aggressive form of cancer that put him through hell, but now he's on the other side of the battle and the cancer lost. He has a great career working for San Jose State University in their shipping & receiving department. ABOUT..MY..FAITH........ No description of my life experience would be complete without mentioning my relationship with Jesus Christ. My faith in Christ is the guiding light that reaches into every area of my life. It affects how I treat my wife and kids. It affects how I conduct business. It affects how I align my priorities in life and why I say "no" to some things and "yes" to other things. Jesus died on the cross to pay the price for my sins so that I could be forgiven and restored to a relationship with God. Jesus stands at the door of every man's heart, knocking. If you'll humbly acknowledge your need for a savior and open the door, he will come in and make you alive. You can have a relationship with the living God. True freedom in life comes when you make yourself a servant... to Jesus Christ. There's the shortest sermon I ever preached :o)

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