Mold Resistant Framing Lumber

Mold resistant framing lumberSeeing pictures and video of the cleanup after hurricanes, tornados, wind shears, typhoons, tsunami, floods, heavy rains,  sharknados and  anything related to climate change, it is no wonder someone might want to investigate the use of mold resistant framing lumber  for new home construction or a basement build-out. All these catastrophes have the potential to to leave your lumber soaking wet. Combine that moisture and warm temperatures and you have a recipe for mold. If you could, you’d like to prevent that from happening to your brand new home right?

Every year it seams there is another manufacturer trying to sell colorful mold resistant framing lumber products that will set your mind at ease. Technology is a great thing. It seems that attorneys like technology as well; it keeps them busy writing warranties.  This is where you should start with the latest and greatest new product of any kind.

If your mind tells you this particular product could benefit you, do some research. Go on line, find a copy of the warranty before you talk to a product representative. Learn if there are any special installation and handling requirements for the product. Reevaluate if the product will do what the advertising says it will do.

The following information was found on mold resistant framing lumber websites. Each product has requirements and warranties that are unique to them. The information provided below is generalized. Get the facts about the product you are you are interested in directly from the manufacturer.

Installation (required for some products)

The following must be field treated at the time of construction with two saturating brush coats of a wood preservative:

  • All cut ends, bore holes or damage to the surfaces of hem-fir, Douglas fir, and western hemlock of any dimension and to other species with a thickness over six inches; and wood of any species that has been sawn lengthwise or surfaced.
  • Acceptable wood preservatives include Outlast® Q8 Log Oil or other products containing a minimum of 0.675% copper as oxine copper (copper-8 or copper-8-quinolinolate), 1% copper as copper naphthenate, or 2% zinc as zinc naphthenate. Proof of purchase will be required.

Special Handling (required for some products)

  • Wash thoroughly with mild soap and water after working with treated wood.
  • Do not burn pressure-treated wood.
  • Wash work clothes separately from other household clothing before reuse.
  • Do not use pressure-treated wood for mulch.
  • Treated wood scraps and cut offs should be disposed of in a non-hazardous material lined landfill

Limited warranty exclusions to watch for (similar terms found in most warranties)

  • Damage resulting from any cause other than termites or fungal decay including, but not limited to surface mold growth, staining (such as blue stain)
  • Flood
  • Hurricane
  • Tornado
  • Similar natural phenomena
  • Acts of God

Limitation of Liability (similar terms found in most warranties)

In no event shall we be liable for any direct, indirect, incidental, special, consequential or punitive damages any kind, whether or not relating to economic loss, property damage, death or personal injury, regardless of the cause, arising out of or relating to your purchase or use of our products.(Some states do not allow the exclusion or limitation of incidental or consequential damages)

If there is an accepted claim the remedy is (similar terms found in most warranties)

We will, at our option, either (1) provide new wood to replace your damaged wood or (2) reimburse you for the actual, reasonable cost of new wood to replace your damaged wood.

We will not be responsible for costs of labor or any other costs associated with repair, removal or disposal of damaged wood or the handling, installation, construction, repair or similar costs of replacement wood.

Need More?

There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know. – Donald Rumsfeld, former secretary of defense for two US presidents.

Some known knowns

We might assume:

  • Special handling requirements will additional time and labor labor costs to the project
  • Special handling requirements will add additional disposal costs to the project
  • Special handling requirements indicate the product is less environmentally friendly than untreated framing lumber
  • The warranty may not even cover mold that develops
  • Only the cost of replacement pieces will be provided
  • Treated lumber has more moisture than some untreated lumber , as treated lumber dries it is possible for more shrinkage and/or settlement to occur
  • Sharknados are not much of a threat!

Some known unknowns

  • Will living in a home surrounded by structural elements loaded with chemicals year after year have any detrimental health effects on normal, healthy pets, children or adults? (The waste from some of these mold resistant framing products should be put in a lined landfill.)
  • What will the effects be for people with environmental allergies?

Unknown unknowns

By definition, we don’t know


Mold resistant framing lumber products have potential to meet a real need in hot, humid regions around the globe.

The homebuyer looking for protection in the event the their water-front property floods should think twice; once about buying low lying property and again to determine if mold resistant framing lumber will meet their needs.

About Editor

I believe that by providing quality information we can to raise the bar of excellence within the homebuilding industry.

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