Eugene structural drying

Drying needs air that is drier than the wet material. In a Eugene winter, outdoor air is cool and damp for weeks, so opening windows works against the equipment. Contractors close off the drying area, run dehumidifiers sized for the space and keep the house at a normal temperature so warm air can carry moisture to them.

Eugene's rain varies a lot from year to year, from about 20 inches in the driest recorded year to about 75 in the wettest. In a wet year, crawlspaces stay damp into spring, which slows drying of the floor system above.

Our main structural drying page covers the science and equipment.

Neighbourhoods near downtown and campus include early twentieth-century houses with plaster walls and old-growth fir floors. Plaster releases moisture slowly and can lose its bond to the lath if it stays wet; fir floors are often worth drying in place with mats. Before walls are opened in a pre-1978 house, ask about lead paint and asbestos.

In a crawlspace home, water from a main-floor leak soaks the subfloor and drips onto the vapor barrier. Drying only the room leaves the underside wet. Contractors remove wet batts, place air movers along the joist bays and run a desiccant dehumidifier under the house, which keeps working in cold air. Readings on both faces confirm when it is done.

The crawlspace often finishes last.

Rental houses near campus sometimes have leaks that run for days before anyone reports them, particularly over winter break. By the time drying starts, water may have spread far and the EPA's one-to-two-day window has passed. Expect the contractor to remove more material and check for mold before drying. See the Eugene area page for more on local housing.

Ask for the drying log at the end. Daily readings and equipment notes answer most insurance questions. Check the contractor's Oregon license with the Construction Contractors Board before equipment arrives.

A Eugene house in December is cool, the outdoor air is damp and the crawlspace is close to outdoor temperature. Each slows evaporation. Correctly sized dehumidifiers, closed drying areas, desiccant units in cold spaces and a normal indoor temperature compensate, but winter jobs often run a day or two longer than the same leak in summer.

Solid wood floors can sometimes be dried in place with mats, depending on how long they were wet. Laminate and many engineered floors swell at the edges and usually do not recover, so they are often removed to dry the subfloor. Vinyl plank is waterproof, but water trapped beneath it still has to come out.

When readings match the dry standard, repairs begin. Watch the area for a few weeks for a musty smell or new staining, and call for readings if either appears.

Ask how the contractor sets the dry standard, how often they take readings and whether they dry the crawlspace as well as the rooms. Ask for the drying log at the end. Check the license with the Construction Contractors Board.

A musty smell that returns, bubbling paint low on walls, cupping floors or new stains after equipment leaves mean something is still wet. Call for readings rather than waiting.

A good log records temperature, humidity and readings at marked points each visit, plus photos of equipment. Those records answer an adjuster's main question: how anyone knows the house is dry. The Oregon Division of Financial Regulation takes questions if a claim stalls.

Springfield's postwar neighbourhoods dry the same way as Eugene's: rooms above and crawlspace below. Homes nearer the McKenzie can sit in colder air on still nights, which slows crawlspace drying.

Most families stay home during a clean-water drying job. The equipment is loud and may run in several rooms, so plan where people will sleep and keep pets away from cords and air movers. Do not move or switch off machines without asking the crew.