1. Note the details as they appear
Record where the problem shows up, how it relates to weather, and any history with the specific opening.
2. Read the house and the lot
Older masonry, historic-district rules, rolling-watershed drainage, and tree cover all shape the right method.
3. Pin the scope down in writing
Protection, materials, permits, testing, and finish restoration should be explicit, not implied.
4. Get multiple proposals
Compare how providers reason through the same older-home conditions, not only what they quote.
5. Review the closeout in detail
Confirm testing, documentation, warranty terms, and ongoing maintenance responsibilities.