Looking for suggestions for a loft hatch.     Ideally want something quite airtight with a half decent level of insulation.  Been looking at the  airtight Jupiter Blue range which seem to fit the bill but they are tiny.     Saw previous suggestions for the Keylite all in one solution but it doesnt seem that well insulated nor airtight.     Anyone come up with any better solutions that would allow a larger opening?  Happy to have separate ladder set.