Roof Repair question

You may want to try your insurance company.  They may have a list of approved roofers.  I have no idea where you are in Belgium, but if you are South Brussels area, you may want to try these guys: www.toitureslaurent.be

They completely re-built my roof a couple of years ago after a fire.  Excellent work.  It wasn't cheap, but the quality was top notch.