Mac Boles
The Big Pickle
- Joined
- Jul 18, 2011
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I need to install new siding on my house. Do I need to remove my old siding first or can it go over the old. I have researched a little on the web and I see where people do either. If I tear off what do I put back on under it? Tyvek and some rigid foam insulation etc?
It has masonite siding now. Installed back in the 80's
You can install it over it. I would tyvek wrap first to keep the masonite dry. If water gets trapped against it the masonite will deteriorate quickly. Some people would then add foam insulation board before going with vinyl and some don't. Your call there.
When installing the new vinyl manufacturers require to leave the nail heads out 1/32-inch. This allows the vinyl to float and move in hot and cold temperature changes. If you drive the nail tight heat could wrinkle your new siding. Make sure you flash good around doors and windows to keep water from going behind your siding.
Even with a masonite deep profile cut the flat surfaces are plumb which is where you would nail. Air pockets are good breathability plus adds insulatiin value.I don't know where you live but if you are thinking about adding some insulation I would remove what was there. Insulation won't sit on the old stuff well and those gaps make the insulation less effective. also with the added depth of your wall finish it might create issues at doors and windows. and lastly most manufactures of siding call out a certain nail size for the siding, if you have an extra layer in there it can cause issues, especially if you have bad winds or something. I would take it back to the sheathing, add tyvek and then put up whatever new stuff you want. jmo
Even with a masonite deep profile cut the flat surfaces are plumb which is where you would nail. Air pockets are good breathability plus adds insulatiin value.