How to prevent deck rot and extend the life of joists and beams.

October 21, 2019

Rot on wooden deck joists and beams

Many homeowners are aware of deck rot and attempt to avoid the costly water damage to their deck by using composite decking or other wood alternatives. Unfortunately, the importance of protecting the deck structure, most notably the beams and joists, is often forgotten.

Structural deck problems are often caused by moisture trapped between the decking and joists or beams, leading to wood rot and decay. Even pressure-treated lumber is known to rot where screws enter into the wood and create holes that collect water. Prolonged exposure to water from rain or melting snow and materials like leaves stuck between the decking can intensify the problem. Compromised structural integrity can lead to a risk of deck failure. Whether you are a contractor or DIYer, designing and constructing a waterproof deck structure is more important than aesthetics.

Deck over koi pond with dry rot
Deck framing with Imus Seal Butyl Joist Tape installed

Flashing deck joists and beams with joist tape can protect deck structures from water damage and rot. Imus Seal Butyl Joist Tape diverts water, seals decking screws, provides a barrier between metal and wood, and is compatible with common decking materials like naturally durable wood, pressure-treated timber, exotic tropical hardwood, thermally modified wood, and wood plastic composite.

If you are a homeowner, you want your deck to last. Structural deck issues are dangerous and costly to repair. If you are a professional, you want your deck designs or builds to be long-lasting and a good representation of your high-quality work. Protect your deck structure with Imus Seal Butyl Joist Tape.

Colonial house with deck