1. Observe and protect
Write down what you're seeing and when, avoid doing anything that could make it worse, and pull together any past repair history.
2. Evaluate the house and site
Plan around the actual failure points: bulk water entry, ponding under the house, an inspection gap for termite treatment, liner seams and attachment, sealed rim joists, right-sized equipment, and whatever the joists and sills look like today.
3. Define a written scope
Spell out preparation, protective measures, specific materials, access requirements, permits, testing, cleanup, restoration, exclusions, and change-order handling.
4. Compare providers
Verify each provider's credentials, then compare how they reasoned through the scope -- not just the total at the bottom.
5. Inspect closeout
Wrap up by confirming test results, cleanup, documentation, warranty coverage, and whatever maintenance is left to you.