Re: OSB Issues-Toxic Levels

Question Posed:

 "I was just wondering how you felt about OSB (oriented strand board). We will soon begin the framing of our house and are planning to use OSB for exterior walls and interior floor, but I'm a little hesitant about OSB's environmental integrity (possibly emits formaldehyde?)...."

Scotty's Reply:

I have Personally Built and Worked with Homes that utilize OSB used in the Roofs, Exterior Siding, and Flooring-

'With No Ill Effects'  Signed Scotty

For my Own House I would Suggest OSB in the Roof and Exterior Walls (Note: EXTRA ATTENTION TO WATERPROOFING) and for the Sub Floor: Standard Plywood Interlocking Sub Floors.  Two Main Reasons: 1) Floors allways seem to get wet in some time during the Lifetime of a Home. 2) Plywood will take a Little more Abuse while still maintaining its Desired Structural Integrity.

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  OSB Statts
  1. http://stlouisrenewableenergy.blogspot.com/2010/02/green-build-wood-framing-versus.html
• Purchase sustainably harvested wood stamped by the Forest Stewardship Council (FSC).

• Substitute oriented strand board (OSB) for your exterior sheathing. Select boards made from formaldehyde-free glues. If the sheathing is not required for the structure, use nonstructural insulated boards for extra insulation.

Quote from: http://stlouisrenewableenergy.blogspot.com/2010/03/plywood-vs-osb.html

News reports of formaldehyde concentrations in mobile homes provided to victims of Hurricane Katrina has made builders concerned about the softwood, exterior structural panels used to sheathe walls, floors, and roofs. But the moisture-resistant glues used to make exterior sheathing in the U.S. do not contain urea formaldehyde, the adhesive that has created indoor air quality concerns. According to Marilyn LeMoine, spokesperson for the APA, all of the exterior, structural panels manufactured in the U.S. today comply with or are exempt from the California Air Resources Board (CARB) Air Toxic Control Measure for Composite Wood Products, arguably one of the world's most stringent standards regulating toxic off-gassing from building materials.

Most OSB and many plywood panels use the adhesive diphenylmethane diisocyanate (MDI) as a binder, which contains no formaldehyde and no ecological risks, says LeMoine. Some plywood and OSB contain binders made from phenol formaldehyde, which becomes stable during processing and results in such low emission levels in the finished material that these products remain exempt from all formaldehyde emission standards.

The statement "no added formaldehyde" in a wood product may sound like a hedge, but it is only because wood itself contains small measures of formaldehyde. It's all around us, as natural as air and water. You just don't want to breathe too much of it. How much is too much? No one knows, and hence the effort to avoid products that raise the concentrations of formaldehyde indoors beyond the background levels found naturally outside." End Quote Click here to Continue READING
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Scott's Contracting
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http://stlouisrenewableenergy.blogspot.com
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Institute for Environment and Health Assessment on Indoor Air Quality in the Home: Nitrogen Dioxide, Formaldehyde, Volatile Organic Compounds, House Dust Mites, Fungi and Bacteria (Assessment ;2)

 

Green and Eco Friendly Construction Materials

Green and Eco Friendly Construction Materials.  Scotts Contracting Proudly uses these and other Green Construction Materials in the Projects they Build.  Click here to schedule a Free Green Site Evaluation for your Next Project.

Before you begin building your new home, think green with these eco-friendly construction materials.

GO GREEN, SAVE GREEN: Building your new home with green construction materials is an investment that can save you money. (Photo: Branko Miokovic/iStockphoto)

By using green construction materials, you can increase the efficiency of your home and save money without putting undue stress on the environment. Building a sustainable home not only preserves natural resources and minimizes pollution, but also creates a healthy, nonhazardous environment for you and your family.

Bamboo flooring

A fast-growing grass, bamboo is recognized as a green construction material under LEED that requires minimal fertilization or pesticides. Whereas oak takes 120 years to grow to maturity, bamboo can be harvested in only three years. Most bamboo flooring available in North America is made in Hunan Province in China where bamboo is harvested from both natural and plantation groves. This bamboo is typically certified to the standards of the Forest Stewardship Council, meaning it meets strict criteria for environmental sustainability and social responsibility.

Cork flooring

Cork tiles are a rapidly renewable flooring product that comes from the bark of the cork oak tree and can be harvested every 10 years. It's rot- and fire-resistant, transmits little sound and has low volatile organic compounds (VOCs), and its manufacturing process produces almost no material waste. Plus, suberin, a substance of cork, is a natural insect repellant that keeps termites away.

Linoleum flooring

Linoleum is made from dried and milled flax seeds mixed with other plant materials, such as pine resin, wood flour and ground cork. In fact, linoleum is made entirely of natural, renewable resources that are 100 percent biodegradable. This type of flooring also repels dirt and dust — making it hypoallergenic — and is fire-resistant.

Wool carpets

Buying carpet made from animal hair is much more sustainable than buying synthetic carpet because it comes from a renewable, biodegradable resource. Synthetic carpets are often made from Middle East oil while wool carpets are typically made from the hair of sheep and llamas in New Zealand.

Wool isn't merely an eco-friendly material — it's also resistant to soiling, moisture, static and fire, and it's been shown to be less hospitable to dust mites than synthetic fibers. These carpets are also considered superior to synthetic ones because of their texture, durability and natural crimp that preserve the springy quality of the carpet.

Plant fiber carpet

Carpet made from plant fibers is chemically untreated, biodegradable and free of VOCs. One of the most popular types of plant fiber carpet is sisal, which is made from leaves of an agave plant that's grown without pesticides. The hard, thin plant fiber provides a durable surface that doesn't capture dust mites or allergens and is antistatic and sound absorbent.

Cotton batt insulation

This type of insulation — also known as blue jean insulation — is manufactured from denim and cotton fibers. The batts don't use the toxic formaldehyde found in fiberglass insulation, and the manufacturing required for cotton batt isn't nearly as energy intensive as that require for producing fiberglass.

Cotton bat insulation is not only an eco-friendly construction material — it also presents no cancer risk from airborne fibers, doesn't require a respirator during installation and won't cause itchiness like traditional insulations.

Straw board

These green building panels are designed to replace energy-intensive 2x4 and drywall materials for interior partition walls. They're made from compressed wheat or rice straw, which is a rapidly renewable resource — 60 million acres of wheat are grown in the U.S. each year, which results in 140 million tons of leftover straw.

High temperatures force straw to release a natural resin that binds the fibers together, and the boards are then covered with 100-percent-recycled paper liners and adhered with water-based nontoxic glue. In addition to being environmentally friendly, straw board is also fire-, termite- and mold-resistant.

Sunflower seed board

This type of board is composed of sunflower seeds, which is a rapidly renewable resource that's extremely versatile. Sunflower seed board comes in a variety of hues and can be stained, cut and routed like wood. The board can also be used in table surfaces, cabinetry and furniture — its only limitations are kitchen and bathroom countertops.

Poplar OSB

OSB floors are made from sustainably harvested wood that comes from fast-growing trees like aspen poplar. The logs are cut into strands, dried and treated with natural wax, and then they're subjected to high-temperature pressurization.
OSB Toxic Levels-Tuesday, September 7, 2010 by Scotty, Scotts Contracting
Re: OSB Issues-Toxic Levels

Snippet:

• Purchase sustainably harvested wood stamped by the Forest Stewardship Council (FSC).

• Substitute oriented strand board (OSB) for your exterior sheathing. Select boards made from formaldehyde-free glues. If the sheathing is not required for the structure, use nonstructural insulated boards for extra insulation.

By Laura Moss,Fri, Jun 25 2010 at 3:55 PM EST