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Mold guides, written to be used.

DIY tips and tricks, real costs, and the honest line between what you can handle on a Saturday and what needs containment. Written by a licensed GC that has been opening walls in this region since 2012.

Buying & Selling
Buying & Selling

Mold Found During a Home Inspection: What to Ask For Before You Close

A line about mold on an inspection report feels like a dealbreaker. Usually it is a negotiating point. Here is how to find out which, with your own hands and a flashlight, before you sign anything.

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DIY
DIY

Test Your Sump Pump in 5 Minutes (Before the Next Storm Does It For You)

Most sump pumps fail quietly, on a dry day, and nobody finds out until the storm. A bucket of water and five minutes tells you whether yours will start. Here is the test, the cleaning, what the parts cost, and the signs that mean it is time for a professional.

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DIY
DIY

Two Weekend Jobs That Keep Water Out of Your Basement for Good

Before anyone sells you interior drainage, spend two Saturdays on the gutters and the dirt. Here is how to do both, what the supplies cost, and how to tell when the water is coming from somewhere a shovel cannot reach.

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A renter photographing small mold spots below a bedroom window, with a hygrometer on the sill and a notepad nearby
Tenants

Renting With Mold in DC, Virginia or Maryland: What Your Landlord Must Do

Most rental mold fights are lost on paperwork, not on the law. Here is what a tenant in DC, Virginia, or Maryland can do this week, for under fifty dollars, so the landlord has to act.

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A homeowner holding a petri dish settle plate in a basement beside a handheld moisture meter on a workbench
DIY

Are Hardware Store Mold Test Kits Worth It? An Honest Answer

A twenty-dollar mold test kit will almost always come back positive, because mold spores are in every house. Here is what the kit can tell you, what it cannot, and the cheaper things to do first.

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A homeowner in a headlamp and N95 mask inspecting the underside of the roof deck in a residential attic
DIY

Attic Mold Is Usually Your Bathroom Fan, and Here's How to Check

Before you assume the roof is leaking, look at where your bathroom fan ends. A loose duct in the attic is the most common and cheapest cause of attic mold in this region.

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A homeowner photographing a water-stained basement wall with a phone while holding a tape measure for scale
DIY

How to Photograph Water Damage So Your Insurer Actually Pays

Adjusters decide coverage on evidence, and most of it disappears the hour someone starts cleaning. Here is the photo and paperwork routine that takes forty minutes and a phone.

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Towels, a box fan and a dehumidifier set up beside a wet hardwood floor after a small kitchen leak
DIY

The First 48 Hours After a Leak: A Homeowner's Hour-by-Hour Checklist

Wet building material starts to colonize in roughly 24 to 48 hours. Most small leaks can be dried by a homeowner inside that window, if you know what to do first and what to leave alone.

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Gloved hands clearing a white PVC condensate drain line on an air handler with a wet-dry vacuum hose
DIY

Musty Air When the AC Kicks On: The Condensate Drain You Can Clear Yourself

Most musty-smelling air in a Mid-Atlantic summer traces to a pan that will not drain. The fix is a cheap job and about half an hour. Here is how to do it, and where to stop.

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A residential crawl space with exposed floor joists, a vapor barrier on the ground and a closed foundation vent
DIY

Close Your Crawl Space Vents in Summer: Yes, Really

Everyone was taught that a crawl space needs to breathe. In a Mid-Atlantic July, that advice does the opposite of what it promises. Here is why, and what to do about it this weekend.

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Close-up of a painted residential wall near a window with a patch of white fuzzy growth beside a dark spot
DIY

Mold vs Mildew: How to Tell in 10 Seconds and Why It Changes What You Do

Mildew and mold are often the same fungus at different stages, so the word matters less than where the growth sits. Here is how to tell which one you have, what each one needs, and the point where the answer stops being a cleaning job.

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An old painted wood window on a winter morning with condensation on the glass and black mold spots in the corner of the sash
DIY

Black Spots on Your Window Sills? Fix the Condensation, Not the Stain

The black along the bottom of the sash is mold, and wiping it off works for about three weeks. The window is sweating every cold night, and until that stops, the spots come back. Here is the fix, in order of cost.

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Gloved hands pulling back the rubber door gasket of a white front-loading washing machine to reveal dark mold in the fold of the seal
DIY

Front-Loader Gasket Mold: Clean It Right and Stop It Coming Back

The black ring inside your washer door is the one mold job we will never bid on. It is yours, it takes forty minutes, and the supplies cost less than a bottle of detergent. Here is how to do it properly, and the handful of habits that mean you only do it once.

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A homeowner kneeling in a basement with a flashlight and a moisture meter, checking the bottom of a wall for hidden dampness
DIY

Musty Smell But Nothing Visible: How to Track It Down Yourself

A musty smell with nothing to look at is the most common call we get, and most of the time the homeowner can find the source in an afternoon with a flashlight, a hygrometer, and a methodical nose. Here is the search, in order.

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An unfinished basement with a portable dehumidifier draining to a floor drain and a digital hygrometer on a shelf
DIY

The Cheapest Tool That Prevents Most Basement Mold in the DMV

Most basement mold in this region does not start with a leak. It starts with a summer of air sitting above sixty percent humidity that nobody measured. Here is how to measure it, fix it yourself, and spot the cases where the number is telling you something worse.

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Gray mold spots reappearing through a faded, bleached patch of painted drywall near a baseboard
DIY

Why Bleach Makes Mold Worse on Drywall (And What to Use Instead)

The stain vanishes, the smell fades for a week, and then the spots come back darker. Here is why bleach does that to drywall, what actually works, and where cleaning stops being the answer.

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Small black mold spots on a white bathroom ceiling near an exhaust fan grille above a tiled shower
DIY

Bathroom Ceiling Mold: The 40-Minute Fix and the Fan Test That Prevents It

Those black specks over the shower are usually steam with nowhere to go. Clean them in forty minutes, then run the toilet paper fan test to find out why they showed up.

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A person in an N95 respirator and nitrile gloves wiping mold from a bathroom wall with a cloth
DIY

The DIY Mold Playbook: What You Can Safely Clean Yourself — And The Exact Line Where You Stop

Most of the mold in a Mid-Atlantic house is yours to handle with sixty dollars of supplies and an afternoon. Some of it will cost you five figures if you touch it wrong. Here is exactly where the line sits.

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