Eaves Flashing ensures no dripping water between the Eavestrough and the fascia, that can cause all kinds of issues. Just having flashing installed will not fix these issues. It must be installed professionally. The idea is keep the wooden fascia and rafters dry in your home. Having eaves flashing professionally installed will also ensure longer life of your shingles as shingles will curl as a result to either bad or no installation of flashing. I’ve seen many issues in my time as supervisor for another company here in Edmonton. We manufacture all our own flashing to suit every job, even custom flashing were needed.