Dannie,
The fat will definitely have broken down and got onto the roofing materials, but it can be cleaned out.
Call Chemfax in Calgary. I do work in food processing plants and they have stuff that will clean that right up. Something like an engine degreaser (Castrol Super Clean) would work too but I don't know if it would damage your shingles. So I would just cal Chemfax.
That being said I've seen chemicals that are food safe make that wash completely away and dissolve all the fats so there is no residue.
Last edited by sillysod; 02-05-2015 at 04:03 PM.
2017 VW Jetta 1.4T (winter car)
2010 F-350 Nortruck Tool Shed
2007 BMW 5 (Wifey's)
2004 Audi A4 1.8T 6spd Stage III w/ Meth
1985 F-250 6.9L IDI w/ATS turbo