Stucco Repair in Portland, OR: Cracks, Leaks and EIFS

Stucco repair for Portland-area homes

Portland Stucco Pros takes requests for stucco repair, EIFS repair, stucco remediation, stucco inspection and new stucco and re-stucco on homes in Multnomah, Washington and Clackamas counties; the stucco services page explains how they differ. Describe what you see on the wall, and we follow up to talk it through and set up a free estimate.

Stucco is the common term for portland cement plaster: a mixture of cementitious ingredients, aggregate and water. On a framed house it goes over metal lath; it can also be applied directly to concrete and masonry. EIFS, sometimes called synthetic stucco, is a different system: insulation board under a reinforced base coat and a textured finish. They are different systems and are inspected differently, so it helps to know which one your house has.

Why stucco problems here are usually water problems

The 1991–2020 normal annual precipitation at Portland International Airport is 36.92 inches in NOAA’s normals file, and the National Weather Service Portland office’s summary of the same normals shows 36.91. December (5.77 inches), November (5.45) and January (5.03) are the wettest months; July (0.51) and August (0.54) the driest.

The trade’s own guidance assumes that some water gets past any stucco wall, the same as brick or wood siding, and that the water-resistive barrier behind the stucco is the backup. Water finds its way in at windows, doors, vents and decks, and through cracks wider than a hairline. Most hairline cracks are cosmetic. The Northwest Wall & Ceiling Bureau (NWCB), the Pacific Northwest’s plastering trade body, says investigations into leaking buildings invariably trace back to poor flashing or to flashing and barrier that were not properly lapped, and it advises a full evaluation of the wall before the final scope of a repair is decided. That is why stucco cracks and stucco water damage each have a page of their own, and the stucco problems page sorts the common signs into cosmetic and worth investigating.

Stucco in Portland’s climate and code

Oregon applies the building code’s rule for stucco in moist climates county by county. Under the 2023 Oregon Residential Specialty Code (ORSC), section R703.7.3.1.1 names 18 counties, Multnomah, Washington and Clackamas among them, where a water-resistive barrier over wood sheathing under stucco needs a drainage space or drainage material at least 3/16 inch deep, or drainage at least 90 percent efficient with the 60-minute paper option. Oregon also requires kick-out flashing at every wall and roof intersection. A new edition, the 2026 ORSC, took effect on October 1, 2026, and either edition may be used until the 2026 code becomes mandatory on April 1, 2027; the stucco remediation page explains what that means for re-cladding.

Permits are the city’s call. Portland Permitting & Development (PP&D) lists “Replace or repair siding that is not required to be fire-resistant” among outside home repairs that don’t need a permit, and adds: “Even when a building permit is not needed, the project must meet the Building and Zoning Code requirements.” PP&D’s permit page is the place to confirm how your project fits. Portland also has 17 historic districts and 6 conservation districts (the city’s list), and certain changes to historic resources need land use review before construction.

In the Census Bureau’s American Community Survey 2024 5-year estimates, 26.8% of Portland’s homes were built before 1940, and the median year built is 1966.

Check the license before you sign

Oregon’s Construction Contractors Board (CCB) keeps a public contractor license search. The CCB says contractors must put their license number on their advertising, including websites and business cards, and you can also call the board at 503-378-4621. Check the license of whoever gives you an estimate before you sign anything.