Home › Waterproofing

Waterproofing a Royal Oak basement

Updated October 19, 2026 · referral service, not a contractor

Three kinds of foundation sit under Royal Oak: brick or stone (pre-1930s), unreinforced block (1940s–60s) and poured concrete (newer homes and the post-2000 infill). Each gets waterproofed differently, and the first thing a contractor should do is tell you which one you have.

Brick and stone foundations: the pre-war bungalows

Old brick and fieldstone walls leak through mortar joints that have eroded for a century. Interior drain tile still works, but the wall itself needs attention: repointing, a parge coat, and a drainage membrane so water in the wall drops into the tile rather than through the face. Exterior excavation on these houses is delicate because the walls weren't built to be unsupported on one side. Contractors who do a lot of Royal Oak, Ferndale and Berkley work know the drill; ask how many pre-1930 foundations they've done.

Block foundations: the 1950s ranches

Standard interior system: cut the floor at the wall, perforated pipe in stone to a sump, weep holes drilled in the bottom course so the hollow cores drain. This is the most common Royal Oak job because block ranches are the most common Royal Oak house. Expect two to four days.

Poured walls: cracks, not seams

Poured concrete rarely leaks along its whole length. It leaks at cracks and tie-rod holes, which are injected from inside. If a poured-wall basement is wet along the floor seam, the question is the water table and the drain tile, not the wall.

The Royal Oak-specific wrinkle: the sewer

Royal Oak is in the George W. Kuhn drainage district, a combined system where storm and sanitary flow share pipes and the retention basin in Madison Heights buffers big storms. The city's own flooding page explains that when a blocked service line or a surcharged sewer stops the weeping tile from draining, water comes through wall cracks, the floor seam and most often the floor drain. Waterproofing the walls does nothing for a floor-drain backup; that calls for a backwater valve or an overhead sewer conversion. A good contractor asks which you have before quoting.

At the estimate

• Outside: grading, downspouts, window wells, how close the neighbor's roof drains to your wall (Royal Oak side yards are narrow).
• Inside: wall material, staining height, the floor drain, the sump and where it discharges.
• On paper: linear feet, pump and backup models, warranty, permit responsibility.

Get one free estimate

Get one free estimate

Describe the problem and we'll hand it to a single independent contractor who works in Royal Oak. They set up a free visit and a written estimate. You never pay us.

Name Phone Email (optional) ZIP code What's going on?Seepage at the floor/wall seamWater through a wall crackLeaking Michigan basement / stone or brick wallSump pump failed or short-cyclingFloor drain backs up in stormsDamp crawl spaceSomething else Details (optional) Request my estimate

By sending, you agree we may pass your details to one independent local contractor so they can contact you about this request. Privacy.

Sources

• City of Royal Oak, Responding to Street & Basement Flooding (George W. Kuhn Retention Treatment Basin membership; why basements flood; DPS (248) 246-3300) — https://www.romi.gov/386/Responding-to-Street-Basement-Flooding
• Oakland County Water Resources Commissioner, George W. Kuhn Drainage District — https://www.oakgov.com/community/water-resources-commissioner/sewer-drain-systems/drainage-districts/george-w-kuhn-drainage-district
• NWS Detroit/Pontiac, August 11, 2014 Southeast Michigan flooding (4 to 6 inches in about 4 hours; southern Oakland County among the hardest hit) — https://www.weather.gov/dtx/081114_flooding