** Swiss building materials company Amrize AMRZ.N shares fall 5.6%, as it was hit by lower-than-expected results at the company's Building Envelope segment
** Amrize reported a Q1 adjusted EBITDA of $192 million, down 10.3% year-on-year, its Building Envelope reported an adjusted EBITDA of $78 million, a fall of 37.1% compared to last year's level
** "The result is overshadowed by a very weak Building Envelope segment where residential roofing suffered from soft demand and weak pricing, dragging down group results," Vontobel writes
** Today's fall effectively wiped out all of Amrize's gains year-to-date, that stood at around 5% at market close on Wednesday
(Reporting by Tristan Veyet)
((tristan.veyet@thomsonreuters.com))