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Bob Crane
Woodland Management Service / Woodland Real Estate, Keller Williams Fox Cities - Stevens Point, WI
Forestland Experts! 715-204-9671

An algaecide and a regular garden hose should do it.  Far too many people destroy their roof trying to beat the fungus off when all they need to do it to kill it so that the roots will release and it can be rinsed off.

Sep 27, 2017 06:36 PM
Rainmaker
749,650
Jeff Pearl
RE/MAX Distinctive / LIC in VA - Lovettsville, VA
Full Service Full Time Realtor

No, you shouldn't pressure wash or brush asphalt shingles. There are several spray on rinse off products available these days. A basic garden hose should be all the pressure you need. Products are available for cleaning wood, slate, and terra cotta as well. For biological growth and stains, D2 will work. Other surfaces,use  a product like 1 Restore , but more precautions are needed when using that product. A mixture of baking soda and water will help neutralize acid runoff after cleaning.

Sep 27, 2017 06:06 PM
Rainmaker
721,108
Candice A. Donofrio
Next Wave RE Investments LLC Bullhead City AZ Commercial RE Broker - Fort Mohave, AZ
928-201-4BHC (4242) call/text

What the hell is on that roof?

Sep 27, 2017 05:15 PM
Ambassador
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Debbie Reynolds
Platinum Properties - Clarksville, TN
Your Dedicated Clarksville TN Real Estate Agent

We mostly have shingled roofs and the standard for cleaning them is a mild pressure washing using an antifungal solution.

Sep 27, 2017 05:15 PM
Ambassador
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Jeff Dowler, CRS
Solutions Real Estate - Carlsbad, CA
The Southern California Relocation Dude

Good question but I would be asking a reputable roofing company since I don't really know the right answer. Lots of tile here and you don't want to tke cleaning that on by yourself!

Sep 27, 2017 08:07 PM
Rainmaker
4,489,953
Ron and Alexandra Seigel
Napa Consultants - Carpinteria, CA
Luxury Real Estate Branding, Marketing & Strategy

Fred,

I have no idea!  I would talk to a roofer.  We have a lot of terra cotta tiles here!  A

Sep 27, 2017 06:21 PM
Rainmaker
932,931
Thomas J. Nelson, Realtor, ePRO, CRS, RCS-D
Big Block Realty 858.232.8722 - La Jolla, CA
& Host of Postcards From Success Podcast

A great question for a roofer.

Sep 27, 2017 05:52 PM
Rainmaker
5,037,318
Barbara Todaro
RE/MAX Executive Realty - Franklin, MA
Marketing Agent for The Todaro Team

powerwashing can easily damage the roof by removing sand granules from the shingles.... but a light powerwash does the trick.... 

Sep 28, 2017 05:26 AM
Rainmaker
565,713
Nathan Gesner
American West Realty and Management - Cody, WY
Broker / Property Manager

It looks like you've already got some strong answers. Different products for different rooves, don't pressure wash.

On a side note, does anyone say "rooves" any more?

Sep 28, 2017 05:17 AM
Rainmaker
3,361,606
Michael Jacobs
Pasadena, CA
Los Angeles Pasadena 818.516.4393

When it comes to roof questions, I consult the advice of a qualified roofing professional.   

The same goes for information regarding the high tension wires in the background of the photo.  

 

Sep 28, 2017 04:58 AM
Rainmaker
3,053,541
Tony and Suzanne Marriott, Associate Brokers
Haven Express @ Keller Williams Arizona Realty - Scottsdale, AZ
Serving Scottsdale, Phoenix and Maricopa County AZ

Jeff Dowler nailed this one!

Sep 28, 2017 03:39 AM
Rainmaker
846,015
Marco Giancola
Beachfront Realty - Miami Beach, FL
Realtor (305)608-1922, Miami Beach Florida

Down here where we mostly have terracotta or cement tile roofs pressure wash is perfect. I have never had chemicals added and it comes out beautiful. Asphalt or "shingles" is a big no-no as the pressure will destroy them.

Sep 28, 2017 03:31 AM
Rainmaker
525,654
Dave Halpern
Keller Williams Realty Louisville East (502) 664-7827 - Louisville, KY
Louisville Short Sale Expert

Soft wash with specialized cleaning material.

Sep 27, 2017 07:00 PM
Ambassador
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Debe Maxwell, CRS
www.iCharlotteHomes.com | The Maxwell House Group | RE/MAX Executive | (704) 491-3310 - Charlotte, NC
Charlotte Homes for Sale - Charlotte Neighborhoods

I would ask a roofer but, I've always heard that you never pressure wash roofs, windows or wood!

Sep 27, 2017 06:49 PM
Ambassador
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Praful Thakkar
LAER Realty Partners - Andover, MA
Andover, MA: Andover Luxury Homes For Sale

Fred Griffin good answers from .Bob CraneJeff Pearl 

Sep 28, 2017 10:59 PM
Rainmaker
1,379,017
Michael Setunsky
Woodbridge, VA
Your Commercial Real Estate Link to Northern VA

Fred Griffin Power washing can damage a roof and reduce its overall life.

Sep 28, 2017 06:40 AM
Rainmaker
3,302,334
Wayne Martin
Wayne M Martin - Chicago, IL
Real Estate Broker - Retired

Depends on the roof and who you ask for advice.

Sep 28, 2017 06:18 AM
Rainmaker
4,797,423
Gabe Sanders
Real Estate of Florida specializing in Martin County Residential Homes, Condos and Land Sales - Stuart, FL
Stuart Florida Real Estate

It can be pressure washed, but at a soft setting, not high pressure with an algaecide.

Sep 28, 2017 06:11 AM
Rainmaker
3,021,229
Scott Godzyk
Godzyk Real Estate Services - Manchester, NH
One of the Manchester NH's area Leading Agents

It does matter and asphalt shingles should not be pressure washed or brushed

Sep 28, 2017 05:38 AM
Rainmaker
4,432,217
Gita Bantwal
RE/MAX Centre Realtors - Warwick, PA
REALTOR,ABR,CRS,SRES,GRI - Bucks County & Philadel

No idea.

Sep 28, 2017 05:32 AM
Rainmaker
5,424,775
Roy Kelley
Realty Group Referrals - Gaithersburg, MD

We have a cedar shake roof and would never use a pressure washer.

Sep 28, 2017 04:48 AM
Rainmaker
3,052,847
Richard Weeks
Dallas, TX
REALTOR®, Broker

I think pressure washing could actually damage the roof.

Sep 28, 2017 04:39 AM
Rainmaker
3,132,348
Nina Hollander
Coldwell Banker Residential Brokerage - Charlotte, NC
Your Charlotte/Ballantyne/Waxhaw/Fort Mill Realtor

No clue... I've never had a roof cleaned.

Sep 28, 2017 12:39 AM
Rainmaker
1,523,605
Sybil Campbell
Long and Foster REALTORS® 5234 Monticello Ave Williamsburg, Virginia - Williamsburg, VA
REALTOR® ABR, SFR, SRES Williamsburg, Virginia

That is above my pay grade!

Sep 27, 2017 09:51 PM
Rainmaker
2,464,254
Richie Alan Naggar
people first...then business Ran Right Realty - Riverside, CA
agent & author

Never force anything and let the gentle approach be your default

Sep 27, 2017 07:35 PM
Ambassador
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Joe Pryor
The Virtual Real Estate Team - Oklahoma City, OK
REALTOR® - Oklahoma Investment Properties

Interesting, I have never had a rood cleaned in 27 years of real estate.

Sep 27, 2017 06:52 PM
Rainmaker
1,021,864
Sam Shueh
(408) 425-1601 - San Jose, CA
mba, cdpe, reopro, pe

Hose it. If you are afraid of falling off get a roofer. They have special shoes and know what not to step on. I am surpised the guy on the roof has not tripped yet.

Sep 27, 2017 06:51 PM
Rainmaker
1,495,547
Inna Ivchenko
Barcode Properties - Encino, CA
Realtor® • Green • GRI • HAFA • PSC Calabasas CA

Since it is usually dust and some leaves ( no rain in SoCal), a regular hosing or brushing/blowing is usually sufficient. 

Oct 02, 2017 03:01 PM
Rainmaker
3,203,619
Will Hamm
Hamm Homes - Aurora, CO
"Where There's a Will, There's a Way!"

Wow, never had it done so do not know

 

Oct 01, 2017 08:13 AM
Rainmaker
4,106,533
Joan Cox
House to Home, Inc. - Denver Real Estate - 720-231-6373 - Denver, CO
Denver Real Estate - Selling One Home at a Time

Have never cleaned my roof, just the gutters to remove leaves and debris.

Sep 30, 2017 07:24 AM
Rainmaker
576,879
Gloria Valvasori, Accredited Senior Agent
BETTER HOMES AND GARDENS REAL ESTATE SIGNATURE SERVICE - Mississauga, ON
REAL Experience | REAL Commitment | REAL Results!

I have no clue.  Don't think I have "washed" or cleaned a roof in any home I have owned.  

Sep 28, 2017 12:44 PM
Rainmaker
1,247,257
Ryan Huggins - Thousand Oaks, CA
https://HugginsHomes.com - Thousand Oaks, CA
Residential Real Estate and Investment Properties

Definitely not a CA thing.  Maybe a garden hose to move the leaves around.

Sep 28, 2017 09:36 AM
Rainmaker
3,983,315
William Feela
WHISPERING PINES REALTY - North Branch, MN
Realtor, Whispering Pines Realty 651-674-5999 No.

Soft wash only

Sep 28, 2017 08:40 AM
Rainmaker
2,800,051
Kathleen Daniels
KD Realty - 408.972.1822 - San Jose, CA
San Jose Homes for Sale-Probate & Trust Specialist

I am no authority on roofs or cleaning them.  My sense is that the type of roof does matter. 

Sep 28, 2017 08:00 AM
Rainmaker
1,549,135
Sandy Padula and Norm Padula, JD, GRI
HomeSmart Realty West & Geneva Financial, Llc. - Carlsbad, CA
Presence, Persistence & Perseverance

Roofers love to see homeowners pressure wash their shingle roofs

Sep 28, 2017 07:53 AM
Rainer
52,298
Joe D'Agostino
NMLS# 729950 - Manahawkin, NJ
Mortgage Officer 46 years!

Never pressure wash! What should be done is a shampoo type of cleaning. When you start to see many granules from the roof shingles,this is a sign that the shingles are starting to deteriorate,so why quicken the process. Just shampoo or use a mild cleaner made for roofs,and hose off.

Sep 28, 2017 07:06 AM