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Old 07-15-2012, 11:59 AM   #1
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Exterior paint over caulked siding seams


I am just sick! We spent alot of money to reside our house, wrapping it completely with lap siding. We painted with a very nice high grade paint and are completely happy with the outcome. When my husband caulked the seams between the siding, primed it, and re-painted over it, you can see exactly where he did this, it stands out like a sore thumb. What did we do wrong, no one will give any advise as not to affend my contractor husband(painting is not his forte) and he blames me on the caulking I bought that was supposed to be a high end professional grade. I want to know what we need to do to fix this? Any suggestions?


Last edited by broaten90; 07-15-2012 at 12:05 PM.
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Old 07-15-2012, 12:56 PM   #2
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Exterior paint over caulked siding seams


Did you caulk the underside of the lap? and if so why? It is actually supposed to be open so it can breathe and move a bit .

Put a pic up if you can - would help to understand your problem.

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Old 07-15-2012, 01:18 PM   #3
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Exterior paint over caulked siding seams


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Did you caulk the underside of the lap? and if so why? It is actually supposed to be open so it can breathe and move a bit .

Put a pic up if you can - would help to understand your problem.
No, you can caulk the underside of lap siding. If your house needs to breath then a few gaps in your siding aren't going to help. What about when siding is new and there are no gaps? The siding does not rot out.
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Old 07-15-2012, 01:54 PM   #4
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Exterior paint over caulked siding seams


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No, you can caulk the underside of lap siding. If your house needs to breath then a few gaps in your siding aren't going to help. What about when siding is new and there are no gaps? The siding does not rot out.
Maybe we arent talking about the same stuff. Lap siding underneath is not sealed when new unless someone caulks it. I don't do exterior anymore but I have heard countless times from those that do- dont caulk it.

And for that matter she didn't tell us what it was made from either- could be vinyl, could be hardiboard, might even be wood.
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Old 07-15-2012, 01:59 PM   #5
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Exterior paint over caulked siding seams


No picture, no mention of what type siding or caulking that was used, not sure how anyone's going to be of much help without the info.
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Old 07-15-2012, 02:02 PM   #6
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Exterior paint over caulked siding seams


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And for that matter she didn't tell us what it was made from either- could be vinyl, could be hardiboard, might even be wood.
Good point.
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Old 07-15-2012, 02:03 PM   #7
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Exterior paint over caulked siding seams


I blatantly stole this from the pro board-

Kind of sums it up

Not caulking the bottom of the board where it overlaps the one beneath it helps to allow moisture to escape.

Not caulking the ends of the board where it joins the next board, or at the corner of the building allows moisture to enter.


So,....caulking to keep moisture out is good.


Caulking to keep moisture in is bad.
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Old 07-15-2012, 03:48 PM   #8
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Exterior paint over caulked siding seams


problem is if not installed with the right gap at the right depth with the right shape, caulk is better at the latter intended or not

caulking the butt has been the downfall of many fine wood siding jobs

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Old 07-15-2012, 06:27 PM   #9
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Exterior paint over caulked siding seams


Sorry I should of been more clear, we used Hardi plank siding, no caulking underneath it I believed he used fasteners to attach. I am talking about the seams between the boards end to end, those seams. And I bought Rainbuster Top siding caulk I think it was #345? anyway it was supposed to be for siding.
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Old 07-15-2012, 06:44 PM   #10
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Exterior paint over caulked siding seams


May want to look at the latest. instrutions for installing Hardee Plank on there web site. There now suggesting no caulking at the butt seams.
Even if he did install it there should have only been enough to fill the seam, not any on the face of the siding.
I've never heard of that brand of caulking, Hardee suggest only using acrilic latex. Which is water clean up and paintable.

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Old 07-15-2012, 06:49 PM   #11
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Exterior paint over caulked siding seams


I found it,http://rainbusterusa.com/index.php?l...ors&sub=siding

Should have been ok but if he just sloped it all over the face of the siding, that's a problum.
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Old 07-16-2012, 10:40 AM   #12
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Exterior paint over caulked siding seams


Quote:
Originally Posted by Brushjockey View Post
I blatantly stole this from the pro board-

Kind of sums it up

Not caulking the bottom of the board where it overlaps the one beneath it helps to allow moisture to escape.

Not caulking the ends of the board where it joins the next board, or at the corner of the building allows moisture to enter.

So,....caulking to keep moisture out is good.

Caulking to keep moisture in is bad.
Here is something anyone can do next time they see a gap on the bottom of the board. Shine a light up at it and if you cee see the house wrap or behind the boards at all, it letting the wall breath. Odds are all you are going to see is wood as the siding typicly overlaps 2".
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Old 07-16-2012, 03:44 PM   #13
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Exterior paint over caulked siding seams


Rainbuster 345 is an adhesive product as I remember. It touts permanent flexibility to help eliminate squeaks in subfloors, etc. I have never heard of it used as a caulking material. It is composed of elastic polymers so the paint is probably not able to stick to it. Same would be true of silicone.
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Old 07-16-2012, 03:49 PM   #14
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Exterior paint over caulked siding seams


sdsters spot on.
He used the complety wrong product, no wonder it messed up.
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Old 07-21-2012, 12:03 PM   #15
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Exterior paint over caulked siding seams


it was the Rainbuster 900 so, is there a solution, paint wise to this fix? the spots that were repainted over the caulk stands out alittle darker, we painted the house a medium grey color. any suggestions?

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