Thank you for your interest in Home Designer. As you move up the product line you get more custom design options, a larger library catalog of items to choose from and finally tools that make the design process easier. I would recommend our Home Designer Suite as many people find that the feature set in the Essentials version too limited. Here is a link to a detailed comparison matrix. https://www.homedesignersoftware.com/products/product-chooser.html
You can also give our sales department a call to discuss your needs and to help guide you into the right product. We can be reached at 208-292-3400.
Chief Architect Sales
Thanks for using Suite.
Once the roof is in place, then un-check "Auto Rebuild Roofs" on the "Build>Roof>Build Roof..." menu.
Select the Material Painter tool (looks like a spray-paint can) and choose your new roofing material from the library.
Then just click on the roof plane to apply the chosen material.