Seal / Discussions

...seal around the rough opening.  Another thing you are probably experiencing is thermal bridging in the floor as concrete would extend from under your feet to the exterior of the balcony, and that transports a lot of heat. Some insulated matts in front of the sliding door may offer some help too.   

...seal to provide a water and gas barrier before installing xps foam panels on the interior basement walls? Yes, to reduce radon levels in homes and have an effective radon barrier, you would need to seal all holes protruding through the radon barrier or membrane. And by that, please know I mean ‘do your best’ of course,...