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Caroline writes

Should we spray the new plywood with Timbor or Boracare?

We have a 40-year-old home with redwood plywood siding. The siding has worn & we are about to cover it with a new layer. Redwood isn't available; we'll use 11/32 " Breckenridge siding plywood, over builder's paper. Trim is heart redwood & will be replaced as needed. We plan to use a transparent stain, to "even out" old & new wood color. We've had many drywood termite attacks; entry has been through beam ends & trim. Professional Tim-bor treatment has controlled them. Should we spray the new plywood with Timbor or Boracare? Before or after staining?

Answer:

Anytime you are treating exterior wood you should always use Bora-CareIt will last longer in the wood than TimborAlso, when treating new wood with timbor it can leave a powdery residue because it is a powderBora-Care dries clear and will look better after finishing the wood with the stainSince you have a rare opportunity to treat your new siding you should treat with the best, and Bora-care is the bestWhen treating plywood that is close to 3/4" thick, you should apply at a rate of one gallon of Bora-Care to one gallon of waterThis will make two finished gallonsThese two finished gallons should treat 1066 square feet of sidingOnce you have applied the Bora-Care you should wait at least 48 hours for it to dry before applying any type of stain or sealant.

Answer last updated on: 04/02/2010

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Bora-Care

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