Special - $1500 off on roof replacements or 0% APR, 0 payments for one year
J&J Roofing & Construction provides roof replacement, roof repair, moss removal, metal roofing and commercial roofing services throughout Portland, Oregon.
Keeping homes dry since 1984
In the Portland metro area, a roof is more than a structural necessity; it is a high-performance shield against 35 to 37 inches of annual rainfall, while higher elevations in the West Hills can receive approximately 60 inches. At J&J Roofing & Construction, we have been keeping homes dry since 1984, managing the complete technical lifecycle of property protection in Multnomah County.
Our expertise is rooted in the specific requirements of the Portland Bureau of Development Services (BDS). Whether your property is in a historic district like Irvington or a steep slope zone in the West Hills, we navigate the complex intersection of building codes and weather rated materials that others overlook.
GAF Master Elite certified, a designation offered to approximately 2% of roofers in North America.
You can trust we stand behind our work…it is backed by BOTH GAF manufacturer warranties and our workmanship guarantee.
J&J Roofing & Construction is a specialized exterior contractor serving Multnomah and Washington Counties. As a GAF Master Elite® expert, we manage the city building permitting process, ensuring your roof replacement meets all city codes and standards for lasting durability. From the Pearl District and Nob Hill in the Northwest to Sellwood and Mt. Tabor in the Southeast, our company provides expert service to every corner of the area. We are local specialists who know the specific historical and modern needs of homes in Laurelhurst, St. Johns, and the Hollywood District.
From Craftsman homes in Laurelhurst to mid-century properties in the West Hills, J&J Roofing & Construction provides complete roof replacement services throughout Portland. Our crews are experienced in working on compact residential lots, navigating tight property lines, and protecting landscaping, siding, driveways, and surrounding property throughout the tear-off and installation process.
We remove the existing roofing materials down to the roof deck so the underlying wood can be inspected for rot, moisture damage, soft areas, and other concealed problems. Any necessary deck repairs are discussed before the new roofing system is installed. We also evaluate flashing, roof penetrations, valleys, ventilation, and drainage to help address common Portland roofing concerns caused by persistent rain, tree debris, shade, and slow drying conditions. The finished system includes manufacturer-approved underlayment, properly installed flashing, and roofing materials selected for the home’s design and exposure.
Our roof repair crews use moisture meters when appropriate to help trace concealed water intrusion and determine how far the damage may have spread. We provide complex roof repairs for historic Portland bungalows, modern homes, multifamily properties, and commercial buildings.
Whether the problem involves damaged flashing in the West Hills, leaking roof penetrations, failed pipe boots, or moss-damaged shingles in Northeast Portland, we carefully inspect the affected area to identify the likely source and extent of the problem. We then complete the appropriate repairs, replace damaged materials when necessary, and explain any remaining conditions that could affect the roof’s performance or service life.
J&J Roofing & Construction provides commercial roof repair and replacement services for offices, retail buildings, warehouses, multifamily properties, and other low-slope buildings throughout Portland. We install TPO and PVC membrane systems with heat-welded seams for dependable protection against prolonged Pacific Northwest rain.
Before recommending repairs or replacement, we inspect the membrane, drainage, flashing, roof edges, penetrations, and rooftop equipment. This helps us determine whether a targeted repair or complete reroofing system is the most practical solution.
When replacement is necessary, we coordinate access, material delivery, debris control, and scheduling to minimize disruption to tenants, employees, and daily operations. Learn more about our complete commercial roofing services.
Standing-seam metal roofing can be an excellent option for homes near Forest Park and throughout the wooded Southwest Hills. Its smooth panels shed leaves, pine needles, and other organic debris more readily than many textured roofing materials, although regular inspection and maintenance are still important.
Our concealed-fastener metal roofing systems are custom fitted to the property and installed with careful attention to seams, flashing, roof edges, and penetrations. When properly designed, installed, and maintained, metal roofing can provide decades of dependable protection against Portland’s rain, wind, and changing seasonal conditions.
Moss is a common concern on shaded Portland roofs, particularly in tree-lined neighborhoods such as Eastmoreland. It can retain moisture, collect debris, and contribute to premature shingle deterioration when left untreated.
J&J Roofing & Construction provides professional roof cleaning and moss treatment using methods selected to protect the roofing material, surrounding landscaping, siding, and drainage areas. We also inspect valleys, gutters, and visible roof surfaces for conditions that may require maintenance or repair.
Our GAF Master Elite installations can include qualifying shingles with StainGuard Plus™ technology, which is designed to help protect against blue-green algae discoloration. This can be especially beneficial for homes in shaded Portland neighborhoods such as Mount Tabor, where roofs may dry more slowly after wet weather.
Depending on the selected roofing system and eligibility requirements, homeowners may also qualify for an enhanced GAF limited warranty. We help each customer compare shingle options, warranty coverage, expected performance, and project cost so they can choose a roofing system that fits their home and long-term priorities.
Standing-seam metal roofing can be an excellent option for homes in the West Hills and wooded areas of Southwest Portland. Its smooth panels can shed pine needles, leaves, and other organic debris more readily than many textured roofing materials, although valleys, roof penetrations, and drainage areas still require periodic inspection and maintenance.
When properly designed and installed, a concealed-fastener metal roofing system can provide strong resistance to wind, rain, and prolonged Pacific Northwest moisture. Performance depends on the panel system, roof deck, fastening method, flashing details, roof geometry, and exposure of the property. With appropriate installation and maintenance, standing-seam metal roofing may provide 40 to 60 years or more of service while offering a clean architectural appearance and reduced long-term maintenance.
Low-slope roofs on warehouses, offices, retail buildings, and other commercial properties throughout Portland require careful attention to drainage, rooftop penetrations, edge details, and ongoing maintenance. Depending on the building and project requirements, J&J Roofing & Construction installs 60 mil and 80 mil TPO or PVC membrane systems with heat-welded seams.
When properly installed, these membranes create a continuous, water-resistant roofing surface designed to withstand prolonged Pacific Northwest rain and changing seasonal conditions. Reliable performance also depends on adequate slope, properly functioning drains, secure perimeter details, and correctly flashed rooftop equipment. Our commercial roofing team evaluates the complete roof system and recommends an appropriate membrane, thickness, and installation approach for the property.
Proper attic ventilation helps control heat and moisture that can shorten roof-deck and shingle life. Some older Portland homes have narrow eaves or limited soffit space, making standard intake ventilation difficult to install.
J&J Roofing & Construction evaluates the home’s roof design, attic conditions, insulation, and existing vents before recommending improvements. When appropriate, we can incorporate low-profile intake vents, ridge vents, or other ventilation components designed to improve airflow without significantly changing the home’s architectural appearance. The correct solution depends on the structure and applicable manufacturer requirements.
Many like-for-like residential reroofing projects in Portland do not require a building permit. A permit or additional review may be necessary when the project changes structural loads, involves certain commercial buildings, includes significant structural modifications, or affects a regulated historic resource. We evaluate the project requirements before work begins and help coordinate applicable documentation.
In the damp PNW climate, poor ventilation traps warm, moist air in the attic, leading to "attic rain" (condensation) and mold. We install balanced intake and exhaust systems to prevent decking rot and ensure your shingle warranty remains valid.
Neighborhoods like Irvington and Ladd's Addition have strict material and profile requirements. We specialize in matching historic aesthetics with modern GAF composite systems that pass historic review while providing superior protection.
We utilize a surgical tear-off process during the rainy months, only removing sections that can be completely waterproofed by the end of the day. This ensures your home interior is never exposed to the elements.
Costs vary based on pitch, material, and city permitting fees. A standard residential replacement in Multnomah County typically ranges from $12,000 to $25,000, including municipal permit compliance and GAF Master Elite warranties.
Typically, no. Most Oregon carriers view moss as a maintenance issue. Regular professional cleaning and preventative treatments are critical to preserving your coverage and extending the life of your roofing system.
Standing water is the primary threat to flat roofs in the Industrial District. We recommend bi-annual inspections to clear drain blockages and inspect heat-welded seams to ensure your monolithic barrier remains waterproof.
It represents four decades of local experience. We don't just patch leaks; we restore structural integrity. Our long-standing tenure means we've seen every PNW weather event and know exactly how to build systems that survive them.
From the steep slope challenges of the West Hills to the historic preservation requirements in Ladd’s Addition, our teams navigate the specific complexities for regional zoning and environmental roofing standards. We understand that a roof in the Portland metro corridor faces unique hydrostatic pressure compared to rural properties.
Whether we are managing a complex tear off in the Pearl District or a multi day installation in Portland, our process is engineered to meet and exceed local municipal drainage standards. By focusing on precision flashing and reinforced valleys, we protect Portland properties from the concentrated rainfall patterns typical of the Willamette Valley.
We provide factory certified roofing installations and moss mitigation throughout the following areas:
From historic restorations in Multnomah County to modern commercial upgrades, our crews are active every day throughout the local metropolitan area. Explore our recent work and technical solutions.
This upscale residential property in Portland’s challenging West Hills was a prime candidate for a complete roofing system overhaul. The large, multi level home, Perched on a steeply sloped, manicured lot, this large, multi-level estate featured an aging asphalt shingle roof that was well past its prime. Its complex architecture, numerous valleys, and varying pitches demanded a methodical, high-precision approach.
Project Details
J&J Roofing & Construction is a multi state contractor licensed in Oregon (CCB# 220419). We provide expert repairs and full replacements for the following communities:
Neighborhood: Marshall Park | Zip Code: 97219
“If only there was a way to give J&J TEN stars! To make a long story short, we were horribly scammed by criminal “roofers” who destroyed our roof just before a major rainstorm came through. When I reached out to J&J, they responded IMMEDIATELY, got someone out to give me a very detailed breakdown of the work & materials required AND got a three-man crew to my home THE SAME DAY to seal our roof that the scammers had stripped the shingles from – saving us from what would have been catastrophic water damage. Every step of the way, they were kind, reassuring, professional, and EXTREMELY helpful, going above and beyond!!”
— Benjy Wertheimer, SW Portland
Neighborhood: Kenton / Interstate | Zip Code: 97217
“I had a hole in the roof and needed new shingles and J&J roofing sent someone to look at it. J&J sent out a crew to fix and reroofed the house and did a real good job of it. It took them just a day to do it and clean up the mess around the house. The cost to do it was fair and I was happy with the work they done.”
— Ivan Ochsner, North Portland
Neighborhood: Vernon / Alberta Arts | Zip Code: 97211
“We had a great experience with J&J Roofing from the initial inspection and cost estimate to the cleanup and final meeting. The work was done quickly and our new roof looks great! The couple questions we had during the installation were answered quickly. Great warranty too!”
— Deborah Lantz, Northeast Portland
⭐ ⭐ ⭐ ⭐ ⭐ 5.0 Rating Verified by Real Pacific Northwest Homeowners
