Almost every expensive line on an inspection report is a water finding wearing a costume. Trace it back far enough and you find water that got in, or water that didn’t get away. Sellers fix the costume. Buyers pay for the cause.
A note on what this post is. This is a walk-through of where water goes on a house and where sellers tend to lose track of it. It is general information, not a diagnosis of any particular home. There are no repair prices here, because what a fix costs depends on the house. Where something belongs to a specialist, we have said so.
The thesis: it’s all water
Foundation movement. Rot. A musty crawlspace. A stained ceiling. A radon entry path. Paint that keeps failing in the same spot. On a report, those look like six different problems. In the house, they are very often one problem in six outfits.
Sellers fix the costume. Buyers pay for the cause. Patch the stain and the report still says the stain was there, and the buyer’s inspector is already asking where the water came from.
So instead of a list of fixes, this post follows the water itself, from the roof to the foundation, and marks the places where sellers most often lose it.
The path water takes, roof to foundation
Stop 01 · Roof
Roof and flashing
This is where inspectors look first: penetrations, valleys, and the flashing where a roof meets a wall. At the bottom of that junction there is often a small piece called kick-out flashing. When it is missing, water that should be sent out and away runs down behind the siding instead, and it can do that for years before anyone sees a sign.
Roof repair is a specialist’s job. What a seller can do is know where to point the specialist.
Stop 02 · Gutters
Gutters
Undersized, clogged, pitched the wrong way, or pulling away from the fascia. A gutter that overflows in one spot writes its history on the siding directly below it: streaks, staining, and paint that will not hold.
Stop 03 · Downspouts
Downspouts and extensions
One of the simplest fixes in this post, and one of the most commonly missing. Follow every downspout to where it ends. If it ends at the foundation, the gutter above it is delivering water to exactly the wrong place, and an extension that carries it away from the house closes that gap.
Stop 04 · Grading
Grading
Soil around the house should carry water away from the foundation, not toward it. Over the years soil settles and landscaping shifts, and a spot that once sloped away can quietly tip back toward the wall.
Here is the Colorado wrinkle. Parts of the Front Range have expansive soils, which swell when they take on moisture and shrink as they dry. In that kind of ground, water at the foundation is not just a cosmetic issue, because soil that changes volume can move things. That is why a crack that reads as nothing in one house can get a hard look in another. It is worth knowing what your own lot is like, and a specialist can tell you what applies to yours.
Stop 05 · Window wells
Window wells
- Is there a cover, or is the well open to the sky?
- Is the drain at the bottom visible, or packed with years of leaves?
- Does the well sit low against the wall and hold water like a bucket against a basement window?
Stop 06 · Irrigation
Sprinklers and drip lines
Sprinkler heads that spray the siding and foundation every morning all summer. Drip lines run tight against the house. Both are self-inflicted, and both leave evidence: staining low on the siding, damp soil at the wall, and paint that keeps failing near the ground.
Stop 07 · Inside
The interior tells
Water that made it past the outside leaves signs inside, and they are worth learning to read:
- Efflorescence. The white, chalky bloom on basement concrete. It is mineral left behind after water moved through the wall and evaporated. It is not the problem; it is the receipt.
- Staining at the base of a wall. Water gets to the bottom and stays there.
- A musty smell in a “dry” basement. Your nose finds moisture before your eyes do.
- A dehumidifier that runs year-round and never comes up in conversation.
Each one is water telling on itself. Painting over any of them hides the sign and leaves the cause.
Stop 08 · Plumbing
The plumbing side
Not all water comes from outside. Look at the supply lines and angle stops under every sink and toilet, the water heater’s discharge line and drain pan, the ice-maker line behind the refrigerator, and the washing machine hoses. These are small parts, and they are responsible for a startling share of interior damage.
The rain walk
The most useful thing in this post costs nothing but getting wet. During or right after the next real storm, put on boots and walk the house. A dry house tells you almost nothing, because every problem here is a moving-water problem, and you cannot see moving water on a sunny Tuesday.
The rain walk: what to look at
Outside first
- Which downspout is overflowing, or dumping right at the wall?
- Where is water pooling instead of leaving?
- Is anything running back toward the foundation?
- Are the window wells filling?
- Is water pouring over a gutter edge, or running down the siding behind it?
Then the basement, corner by corner, flashlight held low
- Which corner smells different than it did yesterday?
- Any new dampness, staining, or white bloom on the concrete?
- Any drip or wet spot under a plumbing line, the water heater, or the laundry hookup?
Write down what you see, and take photos. That list is a head start for any conversation with your agent, with us, or with a specialist.
DIY, hand off, or leave alone
| Job | Who it belongs to | Why |
|---|---|---|
| Downspout extensions | Homeowner scale | Simple hardware, and easy to see whether it worked. |
| Clearing gutters and window well drains | Homeowner scale | Debris out, water gets through again. |
| Window well covers | Homeowner scale | Keeps rain and leaves out of the well. |
| Sprinkler head adjustment | Homeowner scale | Aim the water at the lawn, not the wall. |
| Supply-line and hose hardware | Homeowner scale | Small parts, and a common source of interior water damage. |
| Regrading | Specialist | Done wrong, it traps water against the foundation instead of moving it away. |
| Sumps, perimeter drains, foundation cracks | Specialist | These need a proper evaluation, not a guess. |
For anything in the specialist rows, we arrange the specialist and stay your point of contact.
What we handle, and what goes to a specialist
The homeowner-scale items above are a good fit for a block of skilled labor: extensions, gutter clearing, well covers, sprinkler adjustments, and supply-line hardware. Our List Ready block is $499 flat for that kind of list. If the rain walk turns up a longer list, Market Ready is $999 flat. You buy any fixtures; we bring the everyday supplies.
Regrading, sumps, perimeter drains, and foundation work sit outside the labor block. When one of those turns up, we arrange the specialist, coordinate with them, and stay your single point of contact. And if a house doesn’t need a block at all, that is what the free consultation is for: we look at what is actually there and tell you honestly what is worth doing.
What it does to the report
A house where the water story is clean gets an inspection report full of small stuff. A house where it isn’t gets a report full of questions. It is the same house either way, but the negotiation is very different.
That is the reason to follow the water before you list, while you can still choose what the buyer’s inspector finds. Sort the small things, get the right specialist looking at the big ones, and walk into the listing with an answer instead of a surprise.
Common questions
What are the most expensive problems a home inspection finds?
Most of the costly ones trace back to water: foundation movement, rot, musty crawlspaces, stained ceilings, failing paint, and radon entry paths. Sellers tend to fix the visible symptom, while a buyer’s inspector writes down the cause.
Why does drainage matter more in Northern Colorado?
Parts of the Front Range have expansive soils, which swell when wet and shrink as they dry. In that kind of soil, water at the foundation is not just cosmetic, because soil that changes volume can move things. Soil varies from lot to lot, so it is worth learning what yours is like.
What is a rain walk?
A walk around your house during or right after a real storm. Outside first: overflowing downspouts, pooling water, water running toward the foundation, and window wells that are filling. Then the basement, corner by corner, with a flashlight held low.
Which water fixes can a homeowner do themselves?
Downspout extensions, gutter clearing, window well covers, sprinkler head adjustment, and supply-line hardware are homeowner-scale. Regrading is not, because done wrong it can trap water against the foundation. Sumps, perimeter drains, and foundation cracks go to a specialist.
What is efflorescence on a basement wall?
The white, chalky bloom left behind when water moves through concrete and evaporates. It is not the problem itself, but it is a sign that water has been getting in. Painting over it hides the sign without addressing the cause.
Before the next storm
Not sure what your house does in the rain?
We’ll walk it with you and follow the water, from the roof to the gutters to the grade to the basement corner that smells different. Free consultation first, so you know what you’re getting. Pre-Listing Pros is a family-run pre-listing service in Northern Colorado. If something turns up that needs a specialist, we’ll arrange it and stay your point of contact. Serving Fort Collins, Loveland, Greeley, Windsor, and across Northern Colorado.