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Repair planning guide

Water damage risk planning

Plan around common water-intrusion paths — drainage, roof, gutters, grading, plumbing, and basements — with EPA/FEMA/CDC guidance and clear caveats for mold and structural risk.

Overview

Most preventable water damage traces back to water that should have been directed away from the building but was not. This guide walks the common paths — drainage, roof, gutters, grading, plumbing, and below-grade spaces — so you can plan inspections and improvements. It is not a diagnosis: where mold, structural movement, or electrical contact with water is suspected, stop and bring in a qualified professional.

Direct water away from the building

Drainage and grading do the quiet work of keeping water out. Plan to keep gutters and downspouts clear and discharging away from the foundation, and to maintain soil that slopes away from the house.

  • Drainage — downspout extensions and clear paths away from the foundation.
  • Roof — addressed in the roof and exterior guide; keep it weather-tight.
  • Gutters — keep clear and properly pitched.
  • Grading — maintain soil that slopes away from the foundation.
  • Plumbing — watch for leaks, supply-line age, and fixture seals.
  • Basement and crawlspace — watch for moisture, efflorescence, and standing water.

Mold and moisture

EPA guidance treats mold control as moisture control: fix the water problem and clean up promptly. EPA notes that larger affected areas (its guidance discusses areas greater than roughly 10 square feet) may warrant professional cleanup. Follow EPA and CDC guidance, and do not disturb large or hidden mold yourself.

When to get a professional assessment

Suspected mold beyond a small surface area, any structural movement, or any water in contact with electrical systems are reasons to stop and engage a qualified professional rather than to investigate further on your own.

Planning checklist

  • Keep gutters and downspouts clear and discharging away from the foundation.
  • Confirm soil grades away from the house, not toward it.
  • Look for visible plumbing leaks and aging supply lines.
  • Watch basements and crawlspaces for moisture, odors, or standing water.
  • Address the moisture source before any cosmetic repair.
  • Document any recurring water intrusion with dated photos.

What to verify locally

Local rules vary and change. Confirm these with the right local authority.

  • Your property's flood and hazard context (see FEMA resources).
  • Whether drainage, sump, or grading changes require permits locally.
  • Requirements vary by location. Verify with your local building department.

When to contact a licensed professional

  • Suspected mold beyond a small, clearly surface-level area.
  • Any structural movement, foundation cracking, or settling.
  • Any water in or near electrical systems.
  • Persistent or unexplained water intrusion.

Documentation to collect

  • Dated photos and locations of water intrusion.
  • History of past leaks, repairs, or flooding.
  • Plumbing age and any prior plumbing work.
  • Relevant flood or hazard information for your area.

Related guides

  • Roof & exterior

    Planning guide

    Plan roof, gutter, siding, flashing, and drainage maintenance from the ground — with a clear safety rule to use qualified professionals for any roof or unsafe-area work.

    Open guide →

  • Inspection checklist

    Planning guide

    A general, visible-signs-only pre-inspection checklist to help you organize observations before a licensed inspection. Not a replacement for a professional home inspection.

    Open guide →

  • Priority planner

    Planning guide

    A risk-and-dependency framework for sequencing home projects: safety, building envelope, water, structural, mechanical, efficiency, then cosmetic. No ROI or resale claims.

    Open guide →

From the platform

  • Explore markets →FEMA National Risk Index climate context by market — regional, not property-level.
  • Methodology →How the climate-risk signal uses county-level FEMA NRI data.

Official background reading

Public-sector references. Housing BuildDesignHub summarizes general guidance and links the source — it does not speak for these agencies.

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Planning guide · last updated 2026-06-01