What kind of lien should I file if I’m able to

I'm not quite clear on the chain of contract here, but it sounds like you subcontracted a roofing job for a general contractor. I don't understand how the owner would owe you a commision, but assuming you (or subs under you) completed the work and you are not paid, and that this is a privately owned project (i.e. not a school or other government facility) you would need to issue notice letters and file a lien within the parameters of Tex. Prop. Code Chapter 53. This is known as a "statutory lien." 

Now, if you determine that you have not met the requirements necessary to file a lien in time, you are NOT without options. But at that point, I would highly recomend reaching out to an attorney to assist you in getting paid. I do exactly this work, so please feel free to reach out to me directly if the need should arrise. 

Ben House

281-762-1377

ben@houseperron.com