The signs of a rotting window are unmistakable. The wood becomes soft and spongy to the touch, and crumbles easily in the hands when dry. Whatever the cause, homeowners may save money by knowing how to repair rot and decay on wooden windows. Basic steps include applying a primer, applying an epoxy, and then finishing the project with paint or stain, and sealer.
Rot may be caused by either sun, or moisture. Both elements are abundantly present in nature, and moisture is typically the more dangerous of the two. Moist, airtight conditions, such as those between a bead of caulk and a wood frame, provide the perfect environment for fungal growth, and dry rot. Failed caulking, damaged finish, and excessive moisture are all reasons that a window might begin to decay.
Homeowners should start the cleaning process by removing rotten wood. Using a knife, or a paint scraper, homeowners should scrape away old paint, and rotten wood, until they reach new wood. For paint to adhere, the surface should be both dry and coarse, so homeowners will need to dry and sand the new wood.
When rot is removed, primer, or consolidant, should be applied. A primer is usually comprised of two liquids, and equal portions of each liquid are mixed to form the final material. The primer soaks into the wood, pre-treating the surface, so that epoxy will adhere.
The primer provides a solid base for the epoxy filler. If the dry rot goes down to the framing, homeowners should drill small, downward sloping holes, and then inject the consolidant. After application, the primer should be allowed to cure, according to the manufacturer’s directions.
After primer has cured, homeowners should apply the epoxy. After mixing, the epoxy should be applied with a trowel, and pressed into damaged areas, or gaps in the wood. When the epoxy has cured, according to manufacturer instructions, it may be sanded, and then primed and painted, or stained. When the topcoat of paint or stain is complete, homeowners should cover the wood with four or five coats of waterproof sealer.
A rotten window is both an eyesore, and a beacon for fungal growth and moisture problems. Homeowners who learn how to repair rot and decay on wooden windows, however, will easily be able to fix this cosmetic problem. Learning this simple repair will also allow homeowners to save a substantial amount on labor costs.
Keeping your sash windows in good condition is a job for the professionals. If you like the appearance of wooden windows, they will need regular maintenance and renovation.