Other than cost, why wouldn't you pour a concrete flooring over the plastic mil? You could easily seal the crawlspace, making it part of a sealed home & have less issues in the future.
Below grade, the vapor drive is from the earth into the basement. By putting the Rockwool under the vapor barrier (poly) the Rockwool wil get saturated by moisture ("dampness") in the coming years because Rockwool is vapor open. This way, the Rockwool will loose a lot of its insulating properties... *Wet or damp materials don't insulate very well...*
I was thinking the exact same thing. Putting that vapor barrier on top has trapped the moisture and then they tapped it to the concrete wall. I guess overtime when the tape pulls away from the moist concrete it could breath a little. Since this product is SO DENSE...that means it can't hold as much moisture which means it will loose its insulating value quickly or will be pushed up out of the way unless their is a sump pump installed which I didn't see in the video. Air is and will always be your best insulator.
@@martyfrancis1011 In Europe, Rockwool is never used below grade (unprotected). Maybe Rockwool applies additives to make the Rockwool water repellent that are different or even forbidden in Europe compared to the USA and Canada. It's very difficult to get some information regarding the insulation value of Rockwool vs its saturation with water vapor. I have seen studies pretending it loses "only" 30% of its insulating properties. But the main problem with using unprotected Rockwool below grade is that we don't know how these water repellent additives will behave over time as they get attacted (degrade) by all kinds of bacteria.
This won't work in coastal regions that are prone to flooding. We have requirements for foundation venting that allows flood water in as well as out. This prevents the hydrostatic pressure on walls when you have storm surge. A swimming pool indeed.
Other than cost, why wouldn't you pour a concrete flooring over the plastic mil? You could easily seal the crawlspace, making it part of a sealed home & have less issues in the future.
Do you put anything on the warm side of the Rockwool along the foundation wall?
How does it dry out under 15 mil plastic
Or on top during build time? As a plumber, wet plastic sucks to work on!!!
Through the gravel
@@niktak1114 After a year of no sun or wind. Plumbers don't like that crap
How does it dry out under 15 mil plastic?
time consuming but this is really intresting
Below grade, the vapor drive is from the earth into the basement. By putting the Rockwool under the vapor barrier (poly) the Rockwool wil get saturated by moisture ("dampness") in the coming years because Rockwool is vapor open.
This way, the Rockwool will loose a lot of its insulating properties... *Wet or damp materials don't insulate very well...*
I was thinking the exact same thing. Putting that vapor barrier on top has trapped the moisture and then they tapped it to the concrete wall. I guess overtime when the tape pulls away from the moist concrete it could breath a little.
Since this product is SO DENSE...that means it can't hold as much moisture which means it will loose its insulating value quickly or will be pushed up out of the way unless their is a sump pump installed which I didn't see in the video.
Air is and will always be your best insulator.
@@martyfrancis1011 In Europe, Rockwool is never used below grade (unprotected). Maybe Rockwool applies additives to make the Rockwool water repellent that are different or even forbidden in Europe compared to the USA and Canada.
It's very difficult to get some information regarding the insulation value of Rockwool vs its saturation with water vapor. I have seen studies pretending it loses "only" 30% of its insulating properties.
But the main problem with using unprotected Rockwool below grade is that we don't know how these water repellent additives will behave over time as they get attacted (degrade) by all kinds of bacteria.
A capillary break is required underneath (typically 3/4" gravel with no fines)
@@koenraadprincen7212comfortboard is treated to be hydrophobic so it can be used below grade
@@niktak1114 Yes, but that does not stop the vapor rising into the Rockwool.
This won't work in coastal regions that are prone to flooding. We have requirements for foundation venting that allows flood water in as well as out. This prevents the hydrostatic pressure on walls when you have storm surge. A swimming pool indeed.
Global warming lollolol