Since the wood portions of the gutters were structurally sound, we opted to recoat and repair the lining with a rubber membrane. Rubber membranes create a waterproof seal on metal, wood, and many other materials, and are often used on roofs and gutters. We chose a liquid membrane called EPDM Liquid Rubber, an emulsion that’s brushed on to create a seamless rubber membrane, which can cover areas of light corrosion directly. Where the corrosion includes gaps larger than 1⁄16″ wide, butyl tape is first used to reinforce the damaged area, then coated with the rubber membrane.
Reaching our gutters on the second story of our home required a 28′-long extension ladder. (Alternately, scaffolding can be rented and set up for such a project.) Concerned about the height and safety, before we began any work we created a simple harness. We ran a 100′ rope over the peak of our roof, then fed one side of the rope through a basement window and tied it to a 2×4 that was then secured to the windowsill with 3″ fasteners. We used the other end of the rope as a harness, securing it around our waists high enough to keep us suspended above the ground if we were to fall.