Roof, Gutter and Drainage Guide for Hampton Roads Homeowners

Use the rain observation checklist  |  See the rainfall-volume example  |  Request a water-path inspection

1. 1. RoofSheds rainfall
2. 2. GuttersCollect runoff
3. 3. DownspoutsCarry it down
4. 4. Buried lineConveys roof water where appropriate
5. 5. Approved outletDischarges at a suitable location

This illustrates a possible route. Every property needs its own assessment; a curb outlet is one option where approved.

A homeowner guide from Harbor Guard Roofing. Brett Mathis brings more than 20 years of roofing experience.

When rain lands on your roof, follow its route: off the roof, into the gutters, down the downspouts and toward a suitable discharge point. A problem at any stage can change where water ends up. Looking at the complete route helps you choose work that addresses the observed problem.

Harbor Guard Roofing provides roof replacement, gutters and underground drainage in Hampton Roads. This guide explains how those services connect, what to observe and what to ask before approving work. It does not mean every home needs all three.

What should happen at each stage?

• Roof: The roof covering and flashing shed rain while protecting the home. An interior leak needs investigation; the visible stain may not identify the entry point.
• Gutters and downspouts: These collect roof runoff and carry it to a planned discharge location. Overflow, leaking connections or a poor discharge location deserve attention.
• Underground downspout drainage: Where appropriate, a buried pipe carries collected roof water to a suitable, approved outlet. The route and outlet must suit the property.

Managing roof runoff can reduce saturation near the foundation. It cannot establish why a crawlspace is wet or guarantee that a settlement problem will stop. The DOE/PNNL gutter and downspout guide explains the connection between roof drainage and water near a home.

How much water can one inch of rain produce?

A roof catchment with a 2,000-square-foot horizontal footprint receives approximately 1,250 gallons during one inch of rain, before losses. Using the EPA conversion, the calculation is 2,000 × 1 × 0.62 = 1,240 gallons, rounded for illustration.

Use the roof area viewed from above, rather than its sloped surface or the home’s total living area. Some water is lost to splash, evaporation and other effects. This example shows volume; it is not a gutter or pipe sizing calculation. Rainfall intensity, the area connected to each downspout, the route and the outlet affect system design. See the EPA rainwater calculation guidance.

Is a buried downspout pipe the same as a French drain?

They serve different purposes. A buried downspout line normally uses solid pipe to convey water already collected from the roof. A French drain typically uses perforated pipe within a gravel trench to collect water along that trench. The DOE/PNNL drainage guide describes this collection approach.

Ask a contractor to identify which system is proposed, what water it will handle and where it will discharge. “Underground drainage” alone is not a complete specification. Harbor Guard evaluates underground downspout drainage as part of the roof-water route. If water is entering from elsewhere, ask what additional assessment is needed.

Can roof drainage solve a wet crawlspace?

It may address a contributing source when roof runoff is reaching the home. Other causes can include groundwater, plumbing leaks, humidity and condensation. A wet crawlspace needs an assessment that distinguishes those causes before work is selected. The DOE/PNNL crawlspace assessment guidance explains why moisture sources must be investigated.

Standing water, cracks or suspected movement may require a separate qualified specialist. Roof, gutter and downspout work is not a substitute for structural diagnosis, foundation repair or crawlspace remediation.

Can every downspout drain to the curb?

No. A curb outlet depends on the property, a workable drainage route and local approval. Do not assume an existing curb opening or a neighbor’s installation establishes permission for your home. Chesapeake lists curb drains under miscellaneous right-of-way permits; requirements elsewhere can differ.

Before agreeing to buried drainage, ask who will confirm the outlet, obtain any required approvals and account for utilities or other obstacles. The proposal should explain the destination of the water and any work excluded from the price.

Which work might your home actually need?

These are illustrative decisions, not Harbor Guard project examples:

1. Sound roof, overflowing gutter: Investigate debris, gutter condition, outlets and downspouts. Maintenance or a targeted repair may be appropriate without replacing the roof.
2. Roof needs replacement, gutters work: Assess whether the existing gutters can remain and how they will be protected or reconnected. Replacement of every component is not automatic.
3. Roof and gutters work, water pools at a downspout: Assess the discharge location and whether a suitable drainage route and approved outlet are feasible. Replacing a functioning roof would not address that observation.

What can you safely observe during and after rain?

Observe from a safe ground-level location. Stay indoors during lightning or unsafe weather; do not climb onto the roof or enter a flooded crawlspace.

• Record the date, approximate rainfall conditions and where you first noticed water.
• Note which gutter section overflows and whether a connection appears to leak.
• Follow each visible downspout to its discharge point. Record disconnected or damaged sections.
• Photograph where water pools and note how long it remains after rain stops.
• Record interior moisture separately. Describe timing and location without assuming the roof is the cause.

Download the one-page homeowner checklist (PDF)

No email address required. Print the checklist and bring your observations to an inspection.

For maintenance, keep visible outlets accessible and report debris or damage. Arrange cleaning and access appropriate to the home; guards and buried pipes still need maintenance. Ask how the proposed system can be inspected and cleared.

What should a written proposal explain?

Look for the problem being addressed, components to repair or replace, items to retain, downspout connections, pipe route, outlet, access, approval responsibilities and maintenance needs. Ask what evidence supports the recommendation and what remains uncertain. Separate the roof, gutter and underground drainage scopes so you can compare equivalent work. For replacement work, also ask how concealed damage and approved changes will be documented.

Ready to discuss your water path? Request an inspection and share your city, observations and any safely taken photos. You can also read about Harbor Guard’s gutter services. The assessment should determine the appropriate scope for your property.

Sources and further reading

This guide draws on the linked DOE/PNNL resources for gutters and downspouts, drainage systems and crawlspace moisture assessment; the EPA rainwater calculation; and Chesapeake civil permit information. Sources checked October 12, 2026. Confirm current requirements for your address before work begins.