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Post Info TOPIC: Cedar Siding Issues

Approved Exterior Cleaner

Status: Offline
Posts: 496
Cedar Siding Issues

The homeowner has requested some assistance getting his cedar cleaned.

The cedar is 4 years old and the cedar needs resealed.

The pictures are what his siding looks like now, and you will see he started to just pressure wash the siding. He definitely is removing a layer of wood when he pressure washed with just water.

We did a test area with a light SH mix, Agent Blue and followed with a coat of Wood Restore.

The issues I see are:

1. The dark small black spots that must be a form of organic growth.  (The test area lightened but did not remove them completely while on was onsite. I have not been able to confirm how it looks now that it has had a couple days to dry)

2. How best to clean this cedar to leave it ready for a new stain.  (His concern is will a neutralizing step with oxalic or Wood Restore hamper his sealer from adhering?)

3. Best Stain for the customer to use-- Seems like Armstrong Clark is highly regarded by our wood experts on the forum

4. Why are there growing black circles around the staples in the lap siding bottoms?  My thinking is those became penetration points and water is causing the "molds" to grow, and the staple is going to rust

5. Is it typical to dry out that quickly? The homeowner prior to installing the siding sealed it on the front and back.

6. Is it typical to staple the bottom exposed edge of cedar siding? Wouldn't that cause it to cup as the wood tries to move?

-- Edited by Steve Salley on Wednesday 18th of May 2016 07:17:44 AM


PAsoftwash Roof & Exterior Cleaning

Steve Salley

Indiana, PA

www. PAsoftwash.com



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