LEED for New Construction - By Building Type

LEEDv4 IAQ Testing Requirements Industrial hygienists across the US have been watching the USGBC as they’ve updated the Indoor Air Quality (IAQ) Testing Credit for Post-Construction. LEEDv4 IAQ Testing requirements have changed since LEEDv2009. Many health and healthy building advocates hoped they would lower the allowable levels of formaldehyde, but due to industry uproar that did






Indoor Environmental Quality, (IEQ) Work Performance, and Health A peer reviewed paper on quantitative relations between indoor environmental quality (IEQ) and work performance or health from the Helsinki University of Technology and the Lawrence Berkeley National Laboratory presents relationships between ventilation rates, temperature, and perceived air quality to short term sick leave, work performance, and






Property Managers Limit RiskProperty Managers Limit Risk

5 Ways Property Managers Limit Risk From Environmental Claims A Property Manager is often stuck between a knife (tenants), a gun (owners), a judge and jury, and a hard place. Environmental claims are common pitfalls that cause even the best Property Managers to stumble into a dark alley, or wind up on the wrong side of the bench in






building science terminology

Building Science Terminology This blog shares some recommended terminology from the US DOE. We are only looking at terminology and frequently used words and phrases in this blog, and not definitions of building science terms. I admit that Building Science Terminology is sophisticated and can be confusing, but I’m not sure that the DOE’s recent efforts






What is Asbestos?

Friday, 31 October 2014 by

What is Asbestos? How Dangerous Is It and What Is It Doing In My House ? These are all questions we’ve asked ourselves at one point or another.  We’ve all wondered WHY would something potentially as carcinogenic  would have been used with near-abandon for so long? Why would this potential carcinogen be lurking our homes,






Where Is Asbestos In The Home?

Friday, 10 October 2014 by
asbestos in the home

Where is Asbestos in the home?  Asbestos, a naturally occurring silicate mineral, was once called the “miracle” fiber, because of its fire-resistant, thermal insulating, non-conductive, flexible, strong, and wear resistant properties. The ancient Greeks and Romans both used asbestos for tablecloths, napkins, towels, and linings for suits of armor. It is rumored that early Roman Emperors






Mercury Mines & Estuaries

Mercury Spills in Our Homes Accidental Release and Clean-up of Small Quantities of ( less than 3 grams) Mercury is a unique metal and has some rather amazing properties. It’s the only metal that is a liquid at room temperature. It was originally described as “silver water” in ancient Greece. Because it is both a






Lead: An Introduction

Wednesday, 11 June 2014 by
Lead Testing for Dust

Lead is a natural elemental metal that has many uses and has been used through antiquity. Though it has many uses it is extremely toxic to humans and as such, has been regulated by government agencies throughout the world. Awareness is growing, but people are still exposed to lead. Lead: an introduction to help you






We decided to lighten the mood at Healthy Building Science by creating a funny building science video about what we do. What started off as a standard informational video soon turned into something very different. We hope you enjoy the results of this building science video. In October 2013, we assembled a team consisting of






Blown-in-Cellulose Insulation

Wednesday, 21 August 2013 by
blown-in-cellulose insulation

Blown-in-Cellulose Insulation Test Results On a recent project, we recommended a homeowner try Blown-in-Cellulose insulation as a healthy alternative to other insulation choices. Blown-in-cellulose is known in the healthy materials world as a pretty safe insulation choice. But just to be sure the product was safe, we sent a wet sample to a lab for






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