Roof repair of container classroom

Descriptions

We have a container that was converted into a classroom, and the roof has rusted in many areas causing water ingress. We patched as many of the rust spots as we could find, and covered the roof with corrugated steel on a wood frame.However the roof is still leaking. The issues are probably stemming from where a log stove chimney goes through the roof, open sides at the ends of the container, possibly lack of flashing along the front of the corrugated steel sheets, and possibly poor overlaps of the corrugated steel sheets.We would like a more thorough job of waterproofing the roof by improving the corrugated steel roof (i.e. flashing all round, including chimney, close end gaps, sealed overlaps etc), and possibly sealing over the rusted areas on the container roof.NOTE: To register your interest in this notice and obtain any additional information please visit the Sell2Wales Web Site at https://www.sell2wales.gov.wales/Search/Search_Switch.aspx?ID=138638.The buyer has indicated that it will accept electronic responses to this notice via the Postbox facility. A user guide is available at https://www.sell2wales.gov.wales/sitehelp/help_guides.aspx.Suppliers are advised to allow adequate time for uploading documents and to dispatch the electronic response well in advance of the closing time to avoid any last minute problems.