Special - $1500 off on roof replacements or 0% APR, 0 payments for one year
J&J Roofing & Construction provides roof replacement, roof repair, commercial roofing, metal roofing, and roof cleaning services throughout Portland, Oregon.
Keeping homes dry since 1984
J&J Roofing & Construction provides residential and commercial roofing services for older homes, modern residences, multifamily properties, offices, retail buildings, warehouses, and other structures throughout Portland. Seasonal rain, mature tree cover, shaded roof surfaces, aging flashing, and drainage problems can all affect how a roofing system performs over time.
Before recommending repair, replacement, cleaning, metal roofing, or commercial roofing work, J&J evaluates the visible roofing materials and the details that commonly allow water intrusion, including valleys, roof edges, chimneys, skylights, vents, pipe boots, wall connections, drains, and rooftop equipment. The goal is to identify the practical scope of work and clearly explain the available options without overstating what a single repair or roofing material can accomplish.
J&J Roofing & Construction provides complete roof replacement services for homes and businesses throughout Portland. Our crews work on compact lots, sloped properties, and complex rooflines while protecting landscaping, siding, driveways, and surrounding areas during tear-off and installation.
After removing the existing roof, we inspect accessible decking for deterioration, soft areas, and moisture damage. We also evaluate flashing, valleys, penetrations, ventilation, and drainage before installing the new roofing system. Options may include architectural shingles or standing-seam metal roofing, depending on the property, budget, appearance, maintenance needs, and warranty eligibility.
See our recent West Hills and Laurelhurst roof replacement projects for examples of how roof complexity, property access, concealed wood damage, and material selection can affect the scope of a Portland roofing project.
Roof leaks do not always begin directly above the interior stain. Water may travel along roof decking, framing, underlayment, or flashing before becoming visible inside the building. J&J inspects the affected roofing area and nearby details to identify the likely source and determine whether surrounding materials may also require roofing repairs.
Common repair areas include damaged flashing, roof-to-wall connections, pipe boots, skylights, chimneys, valleys, missing shingles, and low-slope roof penetrations. After the inspection, we explain the observed conditions, the recommended repair, and any remaining issues that could affect the roof’s service life.
J&J Roofing & Construction provides commercial roofing services, repairs, inspections, and replacement services for offices, retail buildings, warehouses, multifamily properties, and other low-slope buildings throughout Portland. Depending on the building and project requirements, we install Metal, TPO and PVC membrane roofing systems with heat-welded seams.
Before recommending repair or replacement, we inspect the membrane, drains, roof edges, parapet walls, flashing, penetrations, and rooftop equipment. Commercial leaks commonly develop around these transitions and drainage points rather than across the open field of the membrane.
When replacement is necessary, we coordinate access, material delivery, debris control, and scheduling to reduce disruption to tenants, employees, customers, and normal operations. The recommended system depends on the existing roof, drainage, insulation, attachment requirements, building use, and project scope.
Standing-seam metal roofing can be a strong option for Portland homes and qualifying commercial buildings. Smooth metal panels can shed leaves, pine needles, and other debris more readily than many textured roofing materials, although valleys, gutters, penetrations, and drainage areas still require routine inspection and maintenance.
J&J installs concealed-fastener metal roofing systems with careful attention to panel layout, seams, flashing, roof edges, trim, and penetrations. When the system is properly designed, installed, and maintained, metal roofing can provide decades of service while offering a clean architectural appearance.
Moss and organic debris are common concerns on shaded Portland roofs. Growth can retain moisture, collect additional debris, and interfere with drainage when it is left untreated.
J&J Roofing & Construction provides professional roof cleaning and moss treatment using methods selected for the roofing material and surrounding property. The service may include loose-debris removal, moss treatment, and inspection of valleys, gutters, drainage areas, and visible roof surfaces. If cracked shingles, damaged flashing, exposed fasteners, or other deterioration are found, we explain whether repairs should be completed before or after cleaning.
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.
Many Portland homes include chimneys, skylights, additions, multiple valleys, and roof-to-wall connections. These details deserve careful inspection because water intrusion often begins around flashing and penetrations rather than across the open roof surface.
Roofing work on compact Portland properties may require planning around neighboring homes, narrow driveways, mature landscaping, overhead utilities, and limited staging areas. Delivery, tear-off, debris collection, and cleanup should be organized around the conditions of the property.
Tree-lined areas can experience persistent shade, falling needles, leaves, moss, and organic buildup in valleys and gutters. These conditions may slow roof drying and interfere with drainage. Regular inspection, debris removal, gutter maintenance, and appropriate moss treatment can help identify minor concerns before they become more extensive.
Appropriate attic ventilation can help control heat and moisture that may shorten the service life of roof decking and roofing materials. Some older Portland homes have narrow eaves or limited soffit space, which can make standard intake ventilation more difficult to install.
This multi-level West Hills property had an aging asphalt shingle roof across a complex roofline with multiple valleys and varying pitches. The sloped site and limited access required careful staging and debris control during the complete tear-off and replacement. Architectural shingles were installed across the roof system with close attention to valleys, edges, penetrations, and drainage details.
Project Details
This 1956 ranch-style home required a complete roof replacement. After tear-off, the crew identified deterioration in sections of the roof sheathing and at portions of the rafter tails. Compromised wood was replaced as needed, the roof deck was prepared, and GAF Timberline HDZ shingles in Slate Gray were installed with compatible underlayment.
Result: The completed roofing system qualified for a GAF Golden Pledge limited warranty, subject to the applicable warranty terms and eligibility 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, includes significant structural modifications, involves certain commercial buildings, or affects a regulated historic resource. Requirements should be confirmed for the property and project scope before work begins.
A focused repair may be appropriate when damage is limited to a small area and the remaining roof is in serviceable condition. Replacement may be more practical when the roofing material is near the end of its service life, leaks occur repeatedly, damage is widespread, or the roof deck has significant deterioration. An inspection can help compare the likely repair cost with the expected remaining life of the roof.
The appropriate cleaning method depends on the roofing material and the extent of the growth. Moss treatment should avoid unnecessarily aggressive methods that may loosen shingle granules or damage flashing and roof accessories. The roof should also be inspected for cracked shingles, loose materials, clogged valleys, and drainage problems.
Metal roofing may be suitable for many Portland homes, but the recommendation depends on roof pitch, structure, drainage, architecture, exposure, budget, and long-term ownership plans. An inspection can help determine whether standing-seam metal, asphalt shingles, or another system is the better fit for the property.
Depending on the property and project requirements, J&J installs metal, TPO, and PVC roofing systems and provides commercial roof inspection, repair, and replacement services.
Appropriate intake and exhaust ventilation can help control attic heat and moisture. The proper design depends on the home's roof structure, insulation, existing vents, and available intake and exhaust locations. Ventilation is one component of roof performance along with material selection, flashing, drainage, installation, and maintenance.
Roofing work may be completed during suitable weather windows throughout the year. Crews monitor the forecast, limit the amount of roofing removed at one time, and use temporary protection when needed. Scheduling may change when rain, wind, or unsafe conditions could interfere with installation quality or property protection.
Roof replacement cost depends on roof size, pitch, access, existing layers, roof-deck repairs, ventilation, flashing, selected materials, and warranty options. A project-specific inspection is necessary to provide an accurate estimate.
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 Feedback from customers who hired J&J Roofing & Construction.
