In this section, we will discuss two different types of decks; The standard wood plank deck and the waterproof membrane deck. Those who have a standard wood plank deck, the common areas for water intrusion are at the ledger board. This is the board that connects the decking supports to the home. If this board is not flashed correctly or tied into the home’s water-resistant barrier, it can cause water to leak into the structure of the house.
Waterproof membrane decks are generally over a garage or living space, so a leak can cause a significant amount of damage if not addressed early. The common leak areas for this type of decking are at the membrane seams and around any protrusions. This type of deck typically will have a scupper used for water drainage. Still, these can become clogged quickly without routine maintenance and cause water to sit on the membrane. If you have any rips, tears, or lose seems in the membrane material water can accumulate under the decking and cause severe water damage and dry rot. Some of the signs you may have an issue are soft areas, visible damage or bubbling in the membrane, loose-fitting protrusions, or leaks. If the rip or tear is observed immediately, the membrane can be patched and repaired. Still, if the leak has been present for a while, the structure underneath the membrane will need to be repaired, and then the membrane replaced or repaired.