Other Wood Preservatives Flashcards
Name four wood preservatives (besides borates)
Pine tar, copper, zinc, and mercury-based preservatives
How was pine tar prepared?
Usually thinned with oil like linseed, applied hot for better wood absorption
Pros of pine tar?
Good water repellant coating, breathable enough to keep moisture from being trapped in the wood
What parts had pine tar applied to?
Wood shingle roofs and siding
Pros of copper-based napthenate?
water-repellant preservative that reduces checking, splitting, and warping in pressure-treated wood
What are the two most common kinds of copper-based napthenate?
oil-based and water based; water-based contains less copper and doesn’t penetrate into seasoned wood as well (more common)