The header becomes invisible on a mobile device because of the menu. I would add a click to call button so it's easier to get in touch with you. It'll only show up on mobile device and sometimes tablet depending on the resolution.
https://wordpress.org/plugins/call-now-button/ <---- it's free and easy to configure.
Agree with Fred with his suggestions.
Your content is really keyword stuffed, I'd be careful with that. Especially with the overuse of heading tags (h1, h2, h3 etc) to place keywords in. If you're going to create a heading at least make sure there is content below it that has to do with that heading. I think a lot of your content on the homepage could use a separate page in itself. Especially the helpful tips, toward the bottom, they could be another helpful tips page / blog post to throw in there since you already have one.
While "above the fold" isn't really a factor for Google much anymore. I would re-think your homepage content organization to bring more important things to the top.