Boyan mark for valor superintendent we're back over here to bed you want to follow up video to the blower door test mode or video actually had comments from our building inspector when he came through here that mark 4 did the best air sealing anybody be seen in the county in quite some time so kudos to everybody who worked out here today you see we've added a 2x6 wall on top of the existing brick found foundation as you can see there's a gap between our sill plate the top of our pastry roll so what we're going to do here is the most important thing structure we're going to fill that with some ruins and shims put those in there then we're going to come back and throw that the first thing we got to do is clean it out now we're going to finish cutting these shows out of place we're going to take our foam and seal this from the corner all the way across the wall well also at this point make these corners here and the drywall glad to go ahead and crush that in the corner stay in the ball some articles here we're also going to go horizontal we go back so here it is incident we have a space where our framing bus up to an existing masonry chimney what we're going to do is put them fire rated foam in here and then follow it up with some Rossell because we are next weekend now all this may seem tedious but all these golden 1/8 inch caps multiplied over thousands of linear feet really creates a big air leakage at so ultimately that's what we're trying to do then increase the efficiency of it he'll say [Music] how she idiots will snow video where we filled out a smoke correct loss of house and watch smoke weed out our air leakage younger at negative 50 Pascal's with a blowtorch that's one eight thousand one hundred CFM that's roughly equivalent to bus leaving this window open while running pipette so we're at close that might go up keep in mind that we've more than double the square footage on this house so what's wrong wrong 8,000 square feet 2500 square okay P for that lower door test now we're sitting right now about three thousand seven hundred and seventy CFM and negative G passed out originally our number was eight thousand one hundred so we reduced that the event on the Morgan hat while doubling over W square fothe next step is caulking and sealing to close any cracks that air or water vapor could seep through sealants eliminate drafts provide thermal resistance and keep out moisture dust and insects sealing also helps in sound control some insulation companies will send a specialized crew in advance to apply sealants otherwise this is the first task of the insulation installer the sealants you will be using are generally of two types caulking and urethane foam caulking is a paste-like material that cures to a solid state it is applied with a caulking gun to seal small cracks or gaps any holes between conditioned or unconditioned spaces or from floor to floor should be sealed for example drilled holes and studs that electrical wiring or plumbing runs through or vent pipes through a ceiling seams between walls and floors require sealing as you apply the caulking to these small spaces move at a slow steady pace forcing caulking into the gap smooth excess caulking with your fingertip or a putty knife before it dries the second type of sealant you may be using is urethane foam urethane foams are liquid materials that expand rapidly as they set to a semi rigid state they are used to fill larger gaps and holes the most common type is available in an aerosol can or large canister to apply urethane foam follow the directions on the label place the nozzle over one end of the gap and then squeeze the trigger while dragging the nozzle across the gap because this material will expand do not overfill the gaptages it 

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