We're Chris and Melissa, a couple of chronic over-sharing, reno-obsessed, 'semi'-professionals! Our goal is to inspire and empower you to DIY, save money, and create comfortable, designer-inspired spaces of your own.
Thank you so much for addressing the air flow in this process! NOBODY addresses it on RU-vid. Is there any further videos or websites you could possibly point me to regarding this? Edit: Not professional advice - if you want some related information to go research: Ceiling Baffles - this is the product designed for roof air flow. You may also want to research how cathedral ceilings are insulated for additional research. Again, not advice, just sharing some information people may find interesting.
@mar4380 keeps the insulation paper from being tight against the sheetrock. A true and effective vapor barrier is plastic sheeting placed over the insulation. Between the insulation and the sheetrock
You’ve created a situation where you have two vapor barriers in each cavity because you’ve used faced insulation on top of the foam. This will eventually be problematic, especially if you’re dry-walling against the faced insulation. You should have done foam and unfaced or no foam and just used faced insulation. Also, don’t undervalue soffit vents.
can i ask - i don't understand because it looks like he's covering up the ridge vent. so, you're supposed to let air flow up the soffit vent to the ridge vent right? ok BUT... I thought the ridge vent was for hot moist air coming up through the house to escape. I don't understand the point in letting air come in from outside (soffit vent) only to then vent up at the top via ridge vent. That is all sealed from the interior space so what's the point?
I understand the foam board and shims cut for air spacing is essentially same as a purchased, pre-formed baffle. Did you compute the cost difference of buying foam board, cutting and installing, compared to just buying baffles and then insulating?
This was excellent in showing what you did and you made sure you got that air space under the roof sheathing so that the intake soffit air will passively flow up to the ridge vent....I did the same with the porch ceiling making it into a cathedral ceiling...1.5 inch air space....next project is the Attic, gambriel roof so lots of room up there. You said you insulated the floor...I guess in a home attic one has to not insulate the floor to allow for air from inside the home to rise into the living space of the attic ... but..you are above a garage so your attic floor is like the basement floor...got it....Thanks for making this vid. You gave me a better idea to use the left over rigid foam pieces instead of the 2 inch short wooden blocks and to use spray foam instead of screw with special washers to hold up the blue rigid foam. By the way, I had 3 layers of rigid foam each 2 inches thick . In Canada it gets cold here so R ceiling value is really important to make it high. 😉🇨🇦🍁
Never criticize without explaining why it is wrong and providing a suggestion. You are just venting here. Also, this makes "best of luck" sound sarcastic.
It would be nice if you could let us know what is wrong or maybe point us towards some information we could look up. I'm trying really hard to find out how to properly do this
How did the R19 work for you? What region are you in? Is it hot in the summer? Thank you for the video. I am trying to do this now and have been told I have to add extra 2x6's so I can put R38 in other wise the heat will be unbearable.
Virginia. The guy was right. I did the extra 2x6s and the added insulation along with the baffles for the ridge vents made a huge difference. @@mar4380
Great question. With the roof shingles, wrap, plywood roof decking, air gap, rigid foam, fiberglass insulation, and the interior finish layer (combined with the reflective value of the spray foil, the R value is around 42.
@@renovationsemi-pros7016 I hadn't even considered the exterior construction material in the R-value calc. Awesome! I'm actually planning to do this to my upstairs conversion. Except I'm planning to add an extra 0.5" foam board on the outside of the rafters to prevent thermal bridging.
@@renovationsemi-pros7016 But, do all the things you mentioned really add up to that much? How much does plywood add? My understanding was that it basically doesn't.
Good question, Mike. Check out this post we did on the insulation process. We show how we did the baffling. renosemipros.com/insulating-room-over-the-garage/
@@renovationsemi-pros7016 Amazing job! The final projects looks beautiful. Your video was very helpful as I am beginning a similar project in my cape cod. Thank you.
