Hire a Licensed Waterproofing Contractor
Not all waterproofing companies are created equal. Don’t be fooled, there are companies doing work and do not carry the correct license under the state. These knock off companies are not licensed, and are breaking the law. So if something happens their insurance will not cover their work or property damage. You're stuck holding the bag.
If an HOA hires the wrong company with the wrong license, the members can sue the HOA and the management company. Always check to make sure the contractor you hire carries HOA insurance.
The licenses for waterproofing are C-39 & C-33 or B License doing two or more trades.
Extend Your Service Life
Investing in an outdoor deck is an extremely smart investment. In fact, according to the North American Deck and Railing Association, decks have an average return on investment of 100%. Decks are an enjoyable part of a property. Decks can last for many years if maintained. Quarterly power washing goes a long way to maintain your decks.
Re-Seal
The standard rule for resealing your deck is every 3-4 years depending on foot traffic.