Turkey Construction and Building Importer Companies

im looking for a roof hatch which is match with our specification and also im going to send what im looking for Provide zinc-coated steel sheets not less than 1.9 mm with 75 mm beaded flange, welded and ground at corners. Provide a minimum clear opening of 760 by 900 mm. Insulate cover and curb with 25 mm thick rigid fiberboard insulation, covered and protected by zinc-coated steel liner of not less than 0.45 mm. Provide with 300 mm high curb, formed with 75