Gresham homes built before the 1980s in neighborhoods like Rockwood and near the Gresham Pioneer Cemetery often have unlined or deteriorated masonry chimneys that fail under repeated saturation from Multnomah County's wet winters. Occasional flooding raises groundwater levels around foundations, pushing moisture up through flue joints and accelerating corrosion of clay tiles or metal liners. Mild summers do little to dry interior masonry, so condensation lingers and promotes creosote buildup that further stresses liners. DraftSafe Masonry sees these conditions daily when responding from our base at 1005 N Main Ave, Unit 101.
Stainless steel or cast-in-place liners must be chosen based on fuel type and existing flue size. In Portland-adjacent Gresham properties, many chimneys serve both wood stoves and gas furnaces, requiring a liner rated for the higher temperatures of wood while maintaining a proper draft for gas appliances. We route new liners to avoid offsets created by settling foundations common on the area's sloped terrain. Proper termination height above the roofline prevents downdrafts during the frequent winter storms that roll off Mount Hood.
Code compliance in Multnomah County requires liners to meet current NFPA 211 standards for clearance and material. Homeowners near Mt. Hood Community College frequently discover violations during pre-sale inspections when older terra-cotta tiles have cracked from freeze-thaw cycles. We remove debris, install the new liner with insulation where needed, and restore the crown and flashing to keep water out. Every job ends with a smoke test and camera verification before we leave the site.
Technician insight
In Gresham the thing that catches most people out with chimney liner repair is how quickly our wet winters push water past failed crowns on pre-1970s homes in Rockwood. The mild summers never dry the masonry fully, so what looks like a simple liner swap often turns into crown rebuilding once we open the flue. Homeowners near Mt. Hood Community College learn this the hard way during rainy season.
Liner Replacement After Winter Saturation
A Rockwood homeowner called after noticing water stains on the fireplace hearth following heavy winter rain. We found a cracked clay tile liner allowing moisture to migrate through the flue. We removed the damaged sections, installed a new insulated stainless liner sized for the wood stove, and rebuilt the crown to shed water. The system passed smoke testing and has remained dry through subsequent storms.
How it works
- 1
Site Inspection
We examine the flue from top and bottom, checking for water staining, cracked tiles, and creosote in Gresham homes exposed to wet winters.
- 2
Liner Assessment
Measurements and camera footage determine the correct liner diameter and material for the specific chimney in neighborhoods like Rockwood.
- 3
Liner Installation
Old material is removed if necessary, the new liner is positioned, and insulation is added where required by local conditions.
- 4
Testing and Cleanup
A smoke test confirms draft, the crown and flashing are restored, and the work area is cleared before departure.
Pricing
Upfront quotes provided after inspection; cost depends on liner type, flue length, and access difficulty in older Gresham homes.