patching Hardie fiber cement nail holes


Old 07-05-07, 10:42 AM
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patching Hardie fiber cement nail holes

I finished installing Hardiplank siding and 1"x4" trim on my house. A few nail holes are apparent, and a couple of trim pieces cracked, which I would like to smooth out before painting.
The installation instructions indicate that countersunk nails can be caulked over, but there is no mention of how to patch and smooth over cracks. I would like a compound which can be applied like spackling paste, and sanded smooth.
Any suggestions on how to effectively hide these flaws without reducing good weatherability?
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Old 07-05-07, 10:49 AM
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Don't know if it was right or not, but when I re-sided my house, I fixed a couple cracks by using the same caulk I used for nail holes and just worked it into the crack.
Old 07-05-07, 04:29 PM
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What type of cracks need patching?

If you are talking about joints - the correct procedure is to use caulking. A damp rag or sponge will help you to neatly smooth out the caulk - caulking doesn't sand well!
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