We're going to use metal siding on our house. We're using a corrugated profile. Where the siding meets walls/corners/windows, it will run into a strip of C-channel (or J-channel).
Visually, that looks great, but doesn't seem to be much of an actual weatherproof seal. I've searched quite a bit and even asked our siding provider if that is sufficient but there doesn't seem to be a whole lot of info out there on installing metal siding horizontally like this–at least not at the residential level.
Is it OK just to have the siding run into the J-channel? Or should there be more of a seal between the two?
The only possible viable option I've found is expandable foam tape. The idea would be we'd run that along the inside of the C-channel, and then when the siding is inserted that'd create a bit more of a seal.
Any other thoughts/suggestions?
Here's a rendering of the issue. The orange(inside)/blue(outside) is the J channel along the side of the window. The corrugated siding then is inserted into the channel.
Best Answer
The weather proofing and sealing should be done prior to installing the siding. The "J" channel will be installed against he window trim which should be sealed. I've never seen any sealing inside the channel. The siding will expand and contract so any sealing, like caulk for foam tape, wouldn't be effective for long. Good luck