Why Is My Crawlspace Wet Every Winter?
Standing water or saturated soil under the house, usually from November to May. Five causes, checked in the right order.
You lift the crawlspace hatch after a week of rain and there's water down there, or the vapor barrier is floating, or the insulation is sagging and damp. It's one of the most common calls we take on the Kitsap Peninsula, and the reason is geology: most of the county sits on glacial till with a hardpan layer a foot or two down that water can't easily get through. A foundation is a hole dug through that layer and backfilled with loose soil, which makes the crawlspace the lowest, loosest spot on the lot. Water goes there.
The fix depends entirely on where the water is coming from, and there are five places to look, in a specific order: the downspouts, the grading, the footing drain, groundwater from uphill, and a leaking water service line. Checking in that order keeps you from excavating a foundation to solve a downspout problem.
We handle the drainage side of all five: downspout lines, regrading, footing drain replacement, French and curtain drains, and if the meter test says the water line is the cause, the locate and repair too. Exterior drainage work in Washington is excavation work, and it's a core part of what we do.
What it usually means
Downspouts dumping at the foundation
A 2,000-square-foot roof sheds over a thousand gallons in an inch of rain. If the buried downspout lines are crushed, clogged or missing, all of it goes into the backfill against the house. Check these first, in a hard rain.
Grading that slopes toward the house
Decades of landscaping and settled backfill often reverse the slope in the first few feet around the foundation. Cheap to fix, often overlooked.
A silted or outlet-less footing drain
Corrugated pipe laid in native soil without fabric silts shut in a few decades, and the daylight outlet is usually buried or crushed. On 1960s to 90s Kitsap homes this is the usual answer.
Groundwater from uphill
On sloped lots in Port Orchard, Manchester, Enetai, Tracyton and Bainbridge, water perched on the hardpan moves downhill toward the house all winter. A curtain drain across the slope intercepts it.
A leaking water service line
If the crawlspace is wet with no rain, or wet in August, or wet on the side facing the meter, do the meter test. A buried service line leaking near the point of entry floods a crawlspace from that side.
What to check first
- Walk the house in a hard rain and watch every downspout.
- Check the slope of the ground against the foundation on all sides.
- Find the footing drain outlet and see whether it's flowing.
- Note which side of the crawlspace the water enters from.
- Do the five-minute meter test to rule the water line in or out.
When to call
- The downspouts and grading are fine and it's still wet
- You can't find a footing drain outlet
- The crawlspace is wet with no rain
- You want the drainage diagnosed and fixed by one crew
The fix
When it's a buried line or an exterior drain, the fix is footing Drain Repair: we locate first, open the ground once, repair or replace, and put the surface back. One crew, 24 hours a day. (206) 354-9906.
What it looks like when we find it
Wet crawlspace, town by town
The likely causes shift with the ground, the housing era and the water utility. Pick your community.
Bremerton
The shipyard city's older galvanized lines fail quietly and show up as a wet lawn or a water bill nobody can explain.
Silverdale
The 1980s and 90s subdivision boom around the mall left thousands of polybutylene service lines that are now failing on schedule.
Port Orchard
The county seat's hillside lots and clay soils turn small leaks into slope problems, and long rural runs hide breaks for months.
Poulsbo
Little Norway's mix of century-old downtown lines and fast-draining bay-side outwash means leaks hide well and fail suddenly.
Bainbridge Island
Clay soils and 500-foot driveways make island leaks slow to surface and expensive to guess at, which is why we locate before we dig.
Kingston
Ferry-town acreage with long wooded service runs where a leak can hide under hardpan for an entire winter.
Keyport
A century-old Navy village with short lots, old lines and shoreline clay that keeps everything damp.
Tracyton
Bluff-side lots over Dyes Inlet where seeps and springs make it easy to mistake groundwater for a leak and vice versa.
Hansville
Beach cabins at the tip of the peninsula with shallow lines, high water tables and a long drive for anyone who isn't already in Kitsap.
Indianola
A century-old summer colony where shared lines, easements and bluff clay make leaks a neighborhood puzzle.
Suquamish
Two utilities, mixed-era housing and Agate Pass shoreline clay in the heart of the Port Madison reservation.
Manchester
Rich Passage waterfront lots where the service line runs downhill and every leak finds the beach.
Enetai
East Bremerton's bluff-side neighborhood where mid-century copper lines fail on slopes that drain toward the bay.
Lofall
Rural acreage between Poulsbo and the Hood Canal Bridge where well lines run hundreds of feet through hardpan.
Olalla
Well country at the south end of Kitsap where a leaking line shows up as a pump that won't shut off.
Seabeck
Hood Canal forest parcels where boulders, hardpan and long well lines make guessing at a leak an expensive mistake.
East Port Orchard
South Kitsap's 1970s and 80s subdivisions where copper and poly lines are reaching the end of their run.
Rollingbay
The northeast corner of Bainbridge where clay slopes, long drives and small community systems keep leaks hidden for seasons.
Port Townsend
A Victorian seaport where 1890s service lines sit under historic sidewalks and the gravity pipeline from the Quilcene delivers the water.
Questions
Should I just install a sump pump?
Does a vapor barrier fix it?
What fixes it
Footing Drain Repair
Expose, repair and replace foundation footing drains that have silted, crushed or separated and are letting water into a crawlspace.
Read more →
Downspout Drain Line Repair
Replace crushed, clogged or missing buried downspout lines so roof water gets away from the foundation.
Read more →
French Drain & Yard Drainage
French drains, curtain drains, catch basins and swales that move water away from foundations, driveways and soggy lawns.
Read more →Something underground isn't right?
We answer 24 hours a day. We locate before we dig, and we handle the whole job with our own crew and equipment.