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Post Info TOPIC: Cedar shake siding cleaning mix coverage


Approved Exterior Cleaner

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Cedar shake siding cleaning mix coverage
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Hey all, who has used a SH based cedar shake cleaning mix? I have a 5 year old blackened untreated cedar siding job (not roof) that I'm planning on using a 25% ratio mix of 15% SH and surfactant/water. I know the sq/ft'dge of the project. I just need to figure out how much area I can get out of each gallon of mix to crunch  my #'s. siding is a diff. calculation than roofing.



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Maverick Contracting

Long Island, N.Y.



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If I'm reading right thats 3:1. That would be strong. That's almost roof strength. 9:1 should work fine and not as aggressive.

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Thompson Roof Cleaning and Power Washing LLC

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New Jersey

 



Approved Exterior Cleaner

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thanks Ed, I just dont want to come up short as this is an immense house but were only doing a small part to start that should take an hour or two to do and is remote to my local source. If I have to run out for more SH thats another hour+ lost incl. laborer sitting on his azz.

standard paint/stain coverage per gallon is usually figured as 400 sq/ft but with cedar shake (esp weathered) I get 150 sq/ft of stain so condition and type of substrate varies volume numbers. I know what I get on a asphalt roof but vertical cedar siding of mix Im not sure. In the past we always powerwash'd it.

I will start with an 8:1 mix with extra cling agent



-- Edited by Maverick Contracting on Wednesday 17th of September 2014 11:36:00 PM

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Maverick Contracting

Long Island, N.Y.



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If it is raw blackened cedar, I wouldn't even use Sodium Hypochlorite at all. I would use Sodium Percarbonate mixed at about 1 cup per gallon of hot water then apply with a dedicated pump.

 Or I'd use Sodium Hydroxide mixed at about 1 cup per gallon then DS'ed.

Or use a combination of the two.

Then neutralize with oxalic mixed at 1 cup per gallon and DS'ed,..may take a couple applications of neutralizing.

Jeff



-- Edited by Jeff Wible on Thursday 18th of September 2014 07:20:45 AM

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Raystown Pressure Washing

Since 1996



Approved Exterior Cleaner

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Jeff normally we would but in this case just going sh route but am doing a sample with percarb. Then it's the cost factor

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Maverick Contracting

Long Island, N.Y.



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I have a small gazebo to clean. Cedar roof and the rest is untreated cedar or redwood. Where would I purchase sodium percarbonate, sodium hydroxide and oxalic acid?

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Doug Shaffer Restoration Soft Wash, Inc www.restorationsoftwash.com


Approved Exterior Cleaner

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Check your local chemical (SH)supplier or Univar.

Hank

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Pocono Non Pressure Roof & Exterior Cleaning, LLC

Stroudsburg, PA 18360

570-994-6918

Serving the Pocono and Lehigh Valley(Carbon, Lehigh, Northampton, Monroe, Pike and Wayne Counties), PA community as well as both Warren and Sussex Counties of New Jersey



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Been testing with sodium percarbonate, not liking it! But I have some new stuff coming any day. I'm hoping for better results

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sodium percarb. requires pressure to work...

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Lee Kendall

Kendall Roof and Exterior Cleaning

443.880.7011

Maryland Roof Cleaning and Powerwashing Professionals

Maryland-Delaware and parts of Virginia



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Most of the people we meet won't even talk to us if we are using high pressure or walking on their roof at all. You are doing high pressure from a ladder?

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Approved Exterior Cleaner

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Joshua,

I see that you're new to the NSWA. Please take the time to introduce yourself here(www.nationalsoftwashalliance.com/f602060/new-members-introductions/). You might want to re-read the thread.

Hank

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Pocono Non Pressure Roof & Exterior Cleaning, LLC

Stroudsburg, PA 18360

570-994-6918

Serving the Pocono and Lehigh Valley(Carbon, Lehigh, Northampton, Monroe, Pike and Wayne Counties), PA community as well as both Warren and Sussex Counties of New Jersey

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