[acrylicrecoating]

We did a cedar restain. We originally stained the cedar 8 years ago and then again last year. Here is where the problem lies the customer changed the color and there is a line underneath most of the planks as if they shrunk. Took the Sherwin Williams guy out to look at it and he says he has NEVER seen old cedar shrink (it is 14 years old) before. I know that the coverage was there I did it myself and we spray, backroll with a 4 inch whizz and the spray again. I am unsure why this would happen. Weather conditions were good it was September. This is the first time I have seen this and I have been painting for 20 plus years.

Anyone seen this before?

 

[NACE]

Kind of like door panels that shrink and expose bare wood in the fall and spring? Cedar expands and contracts across the grain or vertically if you have a vertical grain exposed. If the flat grain is exposed, or grade 3 flat grain cedar siding OR finger jointed siding, it will expand and contract across the grain at a greater rate than vertical grain. As a result, if the boards are expanding north/south versus east/west, then bare cedar will be expsoed. The only way to correct this is to create dimensional stability in the wood even if the dominant boards are flat grain. How do you accomplich this? Back priming, or re-installing the boards after re-priming all sides to insure that the moisture content remains constant at 8-12%, which cedar will acclimate itself to if properly installed and back-primed. Did something change in the structure to create a different environemt? Was the house expanded, added to, or was there an ice dam, harsh winter, or heavy rain? What changed to make the cedar expand and contract greater than its acclimation? Does this make any sense or am I just rambling?

 

[Safety Guy]

No NACE you are not rambling

I have a cedar sided house and I can say I am glad I am "in the business" or I would cover it with vinyl

When we bought the house the cedar had been neglected and we had tons of split, faded and crappy looking siding. I spent $5000 just in siding to replace what was bad. We backprimed everything before it went up. I still had shrinkage, splits, and gaps. I believe the substrate had alot to do with the problems. The siding was hung over foil faced foam board. I do not even think there is plywood on the corners. There was no extra nailers where needed and some of the siding "walked" away from the house. It was a chit over chit.

This summer I went through the whole exterior and renailed, caulked and generally fixed up the best I could prior to painting. We coated the house with SW Durations and within 2-3 days I could see where the cedar was moving enough to bust some caulk joints.

I guess to get even more long winded than NACE when the material being painted is moving there is not alot you can do. Stuff moves espicially wood. The only solution is to try and talk the customer into a soild stain (woodscapes) and prime in the effected areas that show the shrinkage to try and give an even apperance.

 

[acrylicrecoating]

We used Woodscapes and the guy wants us to redo says it is a warranty problem. So at a loss besides restaining the entire thing.

 

[Shep]

Listen, warrenty is for covering the product. If it has nothing to do with the application and you gave reasonable good results, then if he insists then you can do another application minus the product expense ( maybe 30 bucks a gal )

 

[Safety Guy]

We used Woodscapes and the guy wants us to redo says it is a warranty problem. So at a loss besides restaining the entire thing.

This does not sound like a warranty issue to me. The material shrunk for whaterever reason, the painter nor the manufacturer cannot be held responsible for that. It is not a coating issue.