Hi! Our internal gutter is leaking. It seems to have openings due to heat. What can I use to cover?

It looks like you've chosen the wrong kind of rivets or maybe the gutters you've chosen are not very suitable for the area you live in. Some metals expand during serious heat, and this is probably the reason why your gutters are leaking now. You can try covering the holes with some gutter and roof sealant or try applying aluminum patches on the openings. I would also strongly suggest replacing all the rivets, adding maybe a bigger size and made from a different material, which is not prone to heat.e.