How to Insulate an Above Grade Exterior Wall



hey there in this video we're gonna show you how to properly insulate an above great exterior wall now new construction and new additions by code require a 2 by 6 stud which makes it five and a half inch cavity which is perfect for the raxil Comfort bat are 24 because it is in fact five and a half inches thick and it will fit perfectly in here but before I get to how to install it I want to dress something that a lot of people aren't exactly sure about let's say you're upgrading an older house which has a 2 by 4 exterior wall by using the our 24 you're actually not doing yourself any favors because when you compress the installation it loses its R value so if you're gonna stick with a 2×4 you might as well use the r14 rock cell comfort bat but if you want to go the extra mile and that's me I figured I've gotten this far might as well go all the way just take a 2 by 2 strap it into the existing 2×4 and therefore creating a larger cavity for the rock cell Comfort bat are 24 now how do we install this it's quite simple really I love this product because it is made of stone and slag which is just another way of saying recycled steel and it's very thick and like very rigid so we want to get as high as possible make sure that we cover all gaps and all seals and it's just insert compress and release no see that isolate at the top first to show you one thing that's suckering going anywhere I can pull on this and it's gonna stay nice and rigid moisture resistance should it never get wet it'll repel the moisture and it's gonna stay and maintain its R value so we continue on insert compress and release all right now should you encounter a cavity that is not a standard 16 to Center by stud you got to cut it this is simple you measured off this is about nine and a quarter inches so we're gonna have to cut this but as I told you because this product is made from rock and recycled steel or Schlag you don't want to use a standard of utility knife because you're gonna go through way too many blades so again suggestion is a red knife serrated knife and also you're gonna cut just a little wider just sort of keep that snugness in there so I'm gonna cut these at 10 mark it there work it there and mark it there all right so like cutting a bread like cutting bread with a bread knife nice and long so I've cut this about 3/4 of an inch you want to cut it about half an inch to an inch wider than you need in order to maintain that snugness and again insert compress and release once you've done the entire wall you are ready for vapor barrier alright so now that we're done insulating our exterior wall with Rockville Comfort bat 24 you want to put up a vapor barrier generally the vapor barrier goes on the warm side of the wall but you might want to check your building codes just in case now you also want to make sure you have a nice tight seal should your vapor barrier overlap because it's short or you want to make sure you overlap for a couple of inches staple it in and you want to seal it with this red tape or duct tape nice and tight now the reason we're doing this is because if you have warmer on the inside we don't want it to get inside the cavity where it could mix with cold air creating moisture which leads to an even bigger problem and that's mold and mildew because after building such a beautiful wall why would you want to tear it down to address that issue nice and tight thanks for watching this video

2 Comments

  • Christoff87

    April 13, 2019

    Matt risinger would not like that plastic.

    Reply
  • Skip Garney III

    April 13, 2019

    Ruxol retards water and is mold and moisture resistant. Does the manufacturer recommend an air permeable barrier or just a 6 mil polyethylene plastic?

    Reply

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