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        Painting Window Sills Sign In/Join 
        posted
        Hi. What's the best paint, and prep to paint south facing window sills? It seems like every 2 or 3 years, the paint peels and cracks. Is there a way to paint\seal so that it lasts and lasts?

        Any advise would be welcome. Thank you.
         
        Posts: 8 | Registered: Jan 11, 2007Reply With QuoteReport This Post
        Picture of Jaybee
        posted Hide Post
        It's probably peeling and cracking due to many undercoats of paint already on the sill. For best results, remove all the old paint (or as least all so that whatever is left is just a thin film of color). Then prime and paint the sill.


        Jaybee
         
        Posts: 10454 | Location: Knoxville, Tennessee | Registered: Sep 27, 2003Reply With QuoteReport This Post
        posted Hide Post
        I think I did that in years past, but I will try it again. How about paint? What type of base should I use? Water, acrylic etc.? # of coats?

        Thanks!
         
        Posts: 8 | Registered: Jan 11, 2007Reply With QuoteReport This Post
        posted Hide Post
        if the paint peels, that's due to water infiltration of the jamb. it suggests there is leakage or weeping under the siding to me. and to let the water out, that means latex primer and paint.

        you should probably moisture test several areas of the siding to see if you are setting up for something worse than a scabby looking window sill. how are your gutters? are penetrations, seams, and window frames well caulked? ice dams or water creeping along under a sketchy layer of shingles?


        sig: if this is a new economy, how come they still want my old-fashioned money?
         
        Posts: 5832 | Location: North Burbs, MN | Registered: Mar 14, 2007Reply With QuoteReport This Post
        posted Hide Post
        I've confirmed that there is no extra layers of paint causing the peeling. The peeled paint is revealing the wood below. I must have sanded it all the way down the last time.

        And this is the exterior part of the sill, not the interior. There is no leakage\peeling on the inside of the house or window. These are south facing windows getting nothing but year round sun.

        Latex primer and paint? That could be it. I'll have to check the primer that I used the last time. Very well, keep the comments coming. Thanks!
         
        Posts: 8 | Registered: Jan 11, 2007Reply With QuoteReport This Post
        Picture of GardenSprite
        posted Hide Post
        Does it blister first before it cracks and peels?
         
        Posts: 1949 | Registered: Oct 06, 2006Reply With QuoteReport This Post
        posted Hide Post
        Another option..
        Give them a good coat of paint then have 'em wrapped.
         
        Posts: 899 | Registered: Jan 29, 2010Reply With QuoteReport This Post
        posted Hide Post
        Blister? You could say so. The paint would sort of pull up and crack along lines, but not in circles like a typical blister. If that's what you mean.

        And what does wrapped mean?
         
        Posts: 8 | Registered: Jan 11, 2007Reply With QuoteReport This Post
        posted Hide Post
        And I confirmed that the paint I used, and still have, is a Dunn Edwards, Permasheen-100% Acrylic. Acrylic = Latex yes?

        According to some sites, "Acrylic Latex is the most durable latex paint available yes?

        This can of paint is 10 years old. Do the protection properties of paint lose their effectiveness over time, sitting in the paint can?

        This message has been edited. Last edited by: rubemon,
         
        Posts: 8 | Registered: Jan 11, 2007Reply With QuoteReport This Post
        Picture of Jaybee
        posted Hide Post
        10 year old paint in the can may not be your entire problem, but it's definitely a part of the problem.

        Toss the paint and get some new.


        Jaybee
         
        Posts: 10454 | Location: Knoxville, Tennessee | Registered: Sep 27, 2003Reply With QuoteReport This Post
        posted Hide Post
        Zinnser makes a product called Peel stop. We use this in these cases. You must have no paint on the sill. sand completely. Try to apply it in cool weather 2 coats. We then use Kelly-Moore brand Dura-poxy paint. It's for interior/exterior and has UV protectant in it. We always apply 2 coats at least.
         
        Posts: 4 | Registered: Apr 01, 2014Reply With QuoteReport This Post
        posted Hide Post
        Very well, sand completely. I'll look into the peel stop and get new paint. I'm sure I can find a Kelly Moore store here in SoCal.

        Thanks for the tips. Appreciate it.
         
        Posts: 8 | Registered: Jan 11, 2007Reply With QuoteReport This Post
        posted Hide Post
        Ron's wrapped suggestion is to have them covered with aluminum rolled stock. A "tin man" would use a brake to bend aluminum roll stock to the profile of the sill and cover them.


        General Disclaimer

        Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.

        My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
         
        Posts: 874 | Location: Cary, NC | Registered: Aug 17, 2006Reply With QuoteReport This Post
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