Douglas Garrett

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  • The Truth about Insulation

    They Can All Work, But... Here is What is Important About the Installation... I don’t much care which one of the healthy insulation choices you make. I only care that your insulation installation works and delivers the comfort and efficiency you want and deserve. 1. The Insulation Must be in Contact with an Air Barrier or it Must be an Air Barrier Itself. 5. No Thermal Bypasses

  • Doug Garrett Announces Publication of His New Book: Green Home Building: Money Saving Strategies for an Affordable, Healthy, High-Performance Home

    Green home building does not have to be expensive, or cost more than a few percentage points above a typical home. By using applied building science and combining that with green materials and finishes, you can have the healthy, comfortable, efficient, durable and affordable home you have dreamed of.

  • Ceramic Space Shuttle Beads and Insulating Paint, Oh My!

    I had to laugh when I saw this scam making the rounds again. This is the fourth time that it has attacked the unsuspecting American public over the last 25 years. The story they tell is that all you have to do is add this "magic" white powder to any paint and Presto Chango, the paint is now an R-19 insulating coating. Yes, and I have beach front property in Arizona.

  • Radiant Barrier Attic Insulations & Foil Insulations Meet Reality

    The topic today is the use of radiant barriers made of aluminum foil, foil insulation or aluminum based paints in attics and in particular in an existing attic as a retrofit. Is it worth the money? Does it work and if so, how? What realistic savings can I expect on my utility bills?

  • Condensation on Windows in Winter-Why and How to Fix It

    Condensation on windows, ceilings and walls is often confusing. Why has it become more prevalent in newer homes? What is the solution? Ventilation may require extra dehumdification in summer.

  • Native Landscaping for Birds, Bees and Butterflies in Deer Country

    We live in Texas with a very large deer population, torrid heat and little rain. We maintain about two acres of xeriscape, native plants, perennials, that attract butterflies, birds, and resist deer. All organically.

  • Geothermal Heat Pumps - What You Need To Know and What I've Learned Living With One

    Geothermal heat pumps are high tech and much discussed. We installed one in our new green high performance home. Why we did it, how we did it and what we've learned after 2.5 years. We also have the integral hot water heater.

  • Rainwater Harvesting for Potable Use

    Harvesting rainwater in Texas as a primary source of drinking water. Learn how to store, filter, treat for pathogens, and provide water pressure. On demand hot water system. How did this go during our record setting heat and drought? It's great!

  • Help! It's raining in my crawlspace, and it smells like my high school gym locker!

    Crawlspaces are so misunderstood. They are almost always musty, damp, moldy places. Building science has learned how to make them dry, clean and healthy. To ventilate or not ventilate? Insulation, the kind, and the place for it. Building codes, too.

  • Powered Attic Ventilation Is Unwise, Unnecessary, and Dangerous

    Power attic ventilators are sold everywhere. Many people think they are a good idea. Building science practitioners disagree. They are based on bad physics, can't cure any problems, but they can cause CO, mold, poor comfort, and high electric bills.

  • Closed Bedroom Doors Can Cause Mold and High Carbon Monoxide

    Closing interior doors causes pressure and airflow imbalances in homes and buildings. This can lead to high relative humidity, excessive air infiltration and back drafting of combustion appliances which can result in your CO alarms going off. Read how.

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