Replacing a Rotten Mudsill
Let simple wooden wedges do the heavy lifting.
Synopsis: Builder and contributing editor Mike Guertin takes readers step by step through this essential bit of old-house surgery. He offers a simple way to support the building in sections as the sill is replaced. Guertin also offers tips for avoiding future damage to this vulnerable framing member.
I could spend the rest of my career repairing decay in the homes throughout my town. Pretty good job security, I suppose. Wooden trim, siding, and framing are all susceptible to moisture, fungus, and insect damage.
The worst damage usually occurs where porches, decks, and patios attach to the house because poor or nonexistent flashing details allow water to reach the framing. Mudsills seem to rot faster than other areas, perhaps because the top of the foundation collects water that has leaked into the structure, while more moisture wicks up through the foundation itself.
Replacing a rotten section of mudsill can be…