Are shingles just as fireproof as other roofing material?

Roof Shingles are conform to DIN 4107/part 7 and are therefore resistant against spread of flame.
In every country where IKO sells its shingles, IKO complies with the local norms.
So yes, shingles are fireproof.
Check out this fire test film

Am I limited in the shape of my roof?

Bitumen roof shingles can be applied on the most difficult roof shapes.
Architects like to work with shingles because it gives them a lot of designer freedom.
With an enormous range of styles, bitumen roof shingles can match almost every type of architectural design and achieve virtually any desired effect. Check out our range...

BIM, CAD and Shingles Roof

To help understand the requirements for an optimum shingles roof, an architect book was created. This book is filled with drawings, cross-sections, detailing on various insulated roof details ranging from eaves, chimney, mansard roof, valley and hip to ventilation. Check out the DWG and PDF files here.