Page rank and menus

[AL123al]

Hi,

My client has a large website and has a navigation with main categories. However, they also have a hamburger type navigation in the top right. If you click it it opens to a massive menu with every category and page visible. Do you know if having a navigation like this bleeds page rank? So if all deep pages are visible from the hamburger navigation this means that page rank is not being conserved to the main categories. If you click a main category in the main navigation (not the hamburger) you can see the sub pages. I think this is the right structure but the client has installed this huge menu to make it easier for people to see what there is. From a technical SEO  is this not bad?

[JordanLowry]

I think the easiest way to figure out whether or not Page Rank is properly flowing to those deeper sub category landing pages is to crawl the site with Screaming Frog.

I don't remember if a Moz crawl pulls page rank for every page but if not crawl your client site with Screaming Frog and connect to Moz's API. This will pull in the Page Rank for every page and you can sort to find out if there are any issues.

How does the hamburger menu look like on mobile? I'd be curious to see what the engagement looks like when the entire menu opens by default.