Mike,
You need to follow all of the usual rules for installing windows, especially flashing rules. The entire window rough opening needs to be flashed. The sill pan (either a site-built sill pan or a manufactured sill pan) is especially important.
Mike,
You need to follow all of the usual rules for installing windows, especially flashing rules. The entire window rough opening needs to be flashed. The sill pan (either a site-built sill pan or a manufactured sill pan) is especially important.