Moss and algae removal
Thorough brush cleaning to remove moss growth from the roof surface.
Moss Removal
Roof Moss Removal in Happy Valley, Clackamas & the East Portland Area
Moss is not a cosmetic problem in western Oregon. It holds moisture directly against your shingles, works its way under the edges, and lifts them — and lifted shingles are how water gets in. On shaded north slopes under fir cover, moss can establish itself in a couple of wet seasons.
We remove moss and algae by hand with thorough brush cleaning, clear the debris it leaves behind, and apply a roof-friendly treatment to inhibit regrowth. We do not blast asphalt shingles with a pressure washer to save time.
CCB#238889 · Licensed & insured · Free estimates · Locally & family owned
Recent work
Recent moss removal projects
Real photos from our job sites — we document our work with photos and share them with you.
Signs moss is becoming a problem
- Green clumps growing between and on top of shingles
- Shingle edges visibly lifted or curled where growth has spread
- Dark streaking from algae across the slope
- Growth concentrated on north-facing or heavily shaded sections
- Moss and debris washing into gutters and clogging downspouts
- It has been several years since the roof was cleaned
What moss removal includes
Surface treatment
Application of roof-friendly cleaning solutions or treatments to inhibit future moss, algae, and mold growth.
Debris removal
Clearing leaves, branches, and other debris that has accumulated on the roof, in gutters, and in valleys.
Gutter cleaning
Gutters and downspouts cleaned so drainage works and water does not back up.
Roof inspection
Inspection for signs of damage or potential issues that may need attention.
Landscaping protection and cleanup
Protection of surrounding areas from debris, followed by thorough cleanup and disposal.
Sealing fasteners
Securing and sealing exposed nails for further protection and longevity.
Benefits
Benefits of a moss-free roof
- Prevents moisture retention, rot, and shingle lifting that lead to leaks
- Improves curb appeal and can support your home's value
- Reduces habitat for insects and rodents sheltering in roof debris
- Saves money by prolonging roof life and avoiding premature replacement
- Restores proper drainage through gutters and downspouts
- Gives you a documented look at the roof's condition underneath
Related services
What else your roof might need
- Roof cleaning
For debris and drainage when there is no moss to treat.
- Roof maintenance
The ongoing plan that keeps moss from returning.
- Roof repair
If moss has already lifted shingles or caused a leak.
Our preferred manufacturer
Why we choose Malarkey
New Generation Roofing is a Malarkey Emerald Pro Contractor, certified since 2024, specializing in residential Malarkey roofing systems. We will help you understand the roofing and warranty options appropriate for your home, project, and budget.
Emerald Pro
Malarkey certified contractor since 2024
Rubberized asphalt
Polymer-modified shingles made in Oregon
Complete tear-offs
No new shingles over an old roof
Two warranties
Our 10-year workmanship warranty plus Malarkey's product coverage
Our process
How we handle moss removal
- Step 1
Call or request an estimate
Tell us what you are seeing. If there is an active leak, say so. If roof damage leaves your home exposed to the weather, we can provide emergency roof tarping to help protect the property until permanent repairs can be completed.
- Step 2
On-site inspection with photos
We get on the roof, inspect it properly, and document what we find with photos so you can see the same thing we see instead of taking our word for it.
- Step 3
An honest recommendation and an estimate
Repair or replace, and why. You pay only for what you agree to, with the scope and price confirmed before we start.
- Step 4
Property protection during the work
We protect landscaping and surrounding areas, monitor the weather, and secure coverings if rain moves in mid-project.
- Step 5
Complete jobsite cleanup
We thoroughly clean the jobsite when the work is complete — something our customers regularly mention in their reviews.
- Step 6
Final walkthrough
A quality inspection and walkthrough at the end. For roof replacements, a deposit is due before work begins and the remaining balance is due after all contracted work is completed. For most repairs and smaller services, payment is due after the work is completed.
Reviews
What homeowners say about working with us
“New Generation Roofing was our first choice for a roof replacement in the suburbs of the PNW. They offered the most competitive quote, and were patient and consistent in following up with me when I was researching various options. Every question I asked was answered in detail, and they came out personally to assess our roof and provide a quote. The actual work was done primarily across 3 days. The crew was efficient, provided updates and pictures as they went along, and did not cause any interruptions or inconveniences for my day to day work. The finished roof looks excellent and they were prompt in providing me with all the documentation needed to reflect the changes made and warranty received.”
“I am very pleased with this company. I contacted several companies, and this one turned out to be the best. They completed the work very quickly, and communication was excellent. I highly recommend this company to everyone.”
“New generation roofing is a great company. They are family business with family values and it shows. The team was great the entire process even during delays and set backs due to weather or unforeseen issues coming up — it was always a smooth process. We had to make several changes during the project and they were able to accommodate which was just awesome. I really appreciated that given how stressful construction projects are it was great being able to have trust in the team. I would highly recommend them any day to anyone. Thank you new generation for the awesome service and awesome roof!!”
FAQ
Moss Removal questions we get asked
Does moss actually damage a roof?
Yes. Moss holds water against the roof surface, which promotes rot, and as it thickens it lifts shingle edges. Both create paths for water to reach the substrate below.
How long until the moss comes back?
In this climate moss will eventually return — how fast depends on shade, tree cover, and slope orientation. Surface treatment slows it down, and periodic maintenance keeps it from re-establishing.
Can I just pressure wash it off myself?
Pressure washing removes the protective granules from asphalt shingles and can force water under them. It shortens the life of the roof, and it is one of the more common ways homeowners create a leak.
How do I prevent moss from growing back?
Keep debris off the roof and out of the gutters, trim branches back so slopes dry faster, and have the roof cleaned before growth gets thick.
Service area
Where we provide moss removal
We serve homeowners throughout Gresham and the Greater Portland area. Not sure if you are in range? Call 503-519-6421 and ask.
- Roofing in Happy Valley
- Roofing in Clackamas
- Roofing in Boring
- Roofing in Sandy
- Roofing in Troutdale
- Roofing in East Portland
- Roofing in Gresham
Popular in our primary service areas
Warranty & workmanship coverage
Your roof is covered twice: our workmanship and Malarkey's materials
A roof is only as good as the labor holding it together and the materials on top. You get a written warranty on both.
Our 10-year workmanship warranty
This is New Generation Roofing's own labor warranty on the roof replacements we install. It covers our work — flashing, fastening, sealing, and detail work. It is separate from anything the manufacturer provides.
Malarkey's manufacturer coverage
Separately, the materials carry Malarkey's own product and system warranty. Coverage and any non-prorated period depend on the shingle line and system installed on your roof. This is the manufacturer's warranty, not ours — the two are not the same.
Installed by an Emerald Pro certified contractor
Malarkey's manufacturer warranties depend on correct installation. As a Malarkey Emerald Pro certified contractor, we install complete tear-off systems to the manufacturer's specification so your coverage stands.
Malarkey Secure Choice™ roofing systems
Malarkey runs a Secure Choice™ program for qualifying roofing systems, which can provide enhanced or extended warranty protection when the requirements of the applicable program are met. Eligibility depends on the products, accessories, and installation used on your specific roof — so ask us about qualifying Malarkey Secure Choice™ roofing systems and available warranty protection during your estimate, and we will tell you plainly what your roof does and does not qualify for.
Not every roof qualifies, and no Malarkey program applies automatically. Current program requirements and warranty terms are published by Malarkey; we hand you the applicable documents in writing with your estimate.
- Complete tear-offs on roof replacement projects — we remove the existing roofing so the roof deck can be inspected and properly prepared before the new roofing system is installed.
- Free estimate before any work, with photos of what we found.
- Scope, pricing, and payment terms are confirmed in writing before work begins.
- Licensed and insured Oregon roofing contractor, CCB#238889.
- Roof replacements require a deposit before work begins, with the remaining balance due after the contracted work is completed.
- For most repairs and smaller roofing services, payment is due after the contracted work is completed.
Coverage summary only. Our 10-year workmanship warranty applies to our installation work. Malarkey's manufacturer warranty is a separate warranty covering the materials, issued by Malarkey. Full terms, exclusions, and transfer conditions are provided in your estimate and Malarkey's published warranty documents.
Get a free moss removal estimate
Inspection, photos of what we find, and an honest recommendation — no pressure, no sales pitch.
New Generation Roofing · CCB#238889 · Licensed & insured