Hi,
I have been doing a little research about replacing the siding on a small circa 1920’s bungalow. It seems the recommended process is to remove the existing siding then do the housewrap thing before installing the Hardiplank. I do recall when I replaced a small part of the siding a few years back, that the siding was attached directly to the studs. No exterior sheathing was present. Can I install the HP directly over the old siding or do I need to remove it and install sheathing first? Which would be a drag. Any advice always appreciated.
Mike
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If the existing siding is sound and well-attached, you can put a layer of building paper over it and then hang the Hardi. I had a house with vertical cedar and we covered it with Hardi hung horizontally. It worked fine, but we used SST screws instead of nails.
If you leave the existing siding up you'll have to install strapping or some such to provide a smooth nailing surface. (That is, unless the old and new siding are the same pitch and you want to have a go at "horsefeathering", more or less.)
A couple of questions: Is there currently insulation in the wall? What is the condition of your windows -- will they be replaced?
Thanks,
No insulation and unlikly to replace windows.
Mike