As mentioned above you can make your own materials by using the “Create Material” option from within PlusSpec. This is one of PlusSpec’s most powerful features.
As a further example, attached is a “Shadowclad” ply panel I created… Shadowclad is a range of Plywoods from Carter Holt Harvey (CHH) in New Zealand. I modeled an accurate panel complete with face grooves and weather/joint grooves to show how detailed your self created materials can be. This panel shows accurately in a Takeoff/BOQ.