CRS offers Thermally Broken Roof Hatches by Bilco and Babcock Davis.  They have added polyisocyanurate insulation that is ozone-friendly and has an insulation value of R-20+ for superior energy efficiency.  They also have special EPDM gasketing for better weather and wind resistance.  If you have any questions or do not see the make or model you are looking for, please call (800) 267-2308 and ask for an E-Commerce Representative.