July 9, 20224 yr Hi, I’m using a 600mm square access hatch on my warm epdm roof. The flat roofer is saying I need a builders upstanding as epdm doesn’t stick to the splayed plastic ones supplied. However the mechanism to open them is encased in the built in upstand so would anyone have suggestions for this? I thought epdm could stick to most things if done correctly and there are clips that come down to ‘trap’ the epdm. cheers
July 9, 20224 yr Do you have a drawing of what you are proposing, it sounds like you may be introducing a big thermal bridge.
July 9, 20224 yr Author How do? The dome itself is triple glazed and has an insulated upstand and if I do a builders upstand as well then that would be fully insulated. Thanks for your reply!
July 9, 20224 yr Author U values etc have been calculated for the dome itself it’s more the upstand detail for the epdm I’m concerned about as I assumed the epdm on the splayed factory one would be fine but my roofer has me second guessing myself
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