I hate the closing on Matt's channel but for some reason I loved his silent "on the build show" here 🤣

Conversations like these make me realize how little I know. One could really nerd out and learn a lot about roofing and home building from you guys. Great stuff, gentlemen.

You guys are such a huge help. I can't wait for my Sheffield roof here in Boise, Idaho!

I'm seriously so grateful for all of the knowledge that both of you continue to share. Also, your appreciation for best practices is infectious! Thank you both!

Thanks for the video guys

Two of my favorite channels

Follow both of you. Great to see you in the same frame.

Great content. The close was funny seeing Matt try to close on someone else video. Y'all should have coordinated the close! LOL glad y'all put it in still. Love it

This was crazy good.

Yes nailed it! Vented roof but sealed from the inside. Thats perfect.

Thanks for sharing this. I'm intending to convert my attic space from vented to conditioned, but so much of the information poo-poos non-vented attics. I'm gonna cook the shingles; I'm gonna grow mold and rot the two-by's! And so on.The only reason I'd do this is because I have ducting in the attic. (Well, I DO have ducting in the attic, and the furnace and A/C cooling coils! ) Anyway, I'm in Southern California and we have yearly wind events, the Santa Ana winds, and usually the associated wildfires, and not enough feral cats to control the rats. So more often than not nasty rodents find a way in through the vents (they're smart enough to chew through the screening!). So once again, thanks for encouraging me to go the conditioned attic route.

So much is location on planet earth and budget. Thank you for the video, January 2024 🎈

Thanks!

Please post the assembly details somewhere

You could see Matt wanted to finish the video off with“ the Build Show “ catch phrase. Lol must feel wrong not to say it.

Hi Matt came across your shows and I’m really enjoying your content. I know you are focused on the south and specifically Texas, I’m curious if you’ve heard or seen conditioned attics installed in Canadas colder climates. I understand I would need to follow code and building requirements in Canada but these are often vague. Thanks a lot and appreciate what your doing

Matt, I'm honestly delighted, no THRILLED to see you tackle the best engineering solutions for attic ventilation and cooling. Forgive me if you've already answered this question elsewhere: do you think a reflective foil would help to minimize downward heat radiation in the air gap inside those Hunter panels? A foil facing UP would help to "bounce" radiant heat back into that air gap, further warming the air that is passively moving (and rising) up that air gap. You can call it the RISING-AIR SOLUTION (patent pending) :) Hope you MAKE A MILLION with that new product concept! KEEP UP THE GOOD WORK, as always.

I need you guys here in Rockaway Beach Oregon

Depends on the climate where you live. A conditioned attic makes more sense in warmer climates where the HVAC systems are located. Here in zone 6, HVAC is located in basements for the most part. Many homes in the south don't have basements since frost lines are shallow and not worth the cost for the 9'+ excavation. I'm building a home in MN and will have a vented attic. Top of ceiling drywall will be spray foamed with closed cell to 2" with blown-in on top to R-50. Having roof trusses would limit the space for a usable attic, so no sense to condition the attic space by spray foaming the underside of the roof deck. Our current home uses stick joists with vaulted ceilings, so no attic and the insulation between the roof joists is closed cell foam.

What about the OSB underneath the cool-vent panel? It's got polyiso directly on top, and closed cell spray foam underneath. Doesn't that make it sandwiched between two vapor barriers? How will it dry?

So how is the air sealing of the roof deck done with the Hunter panels? Just the spray foam inside? Also, won't the polyiso of the Hunter panels shrink some over time and pull away from each other?

Honestly buggest benefit of a conditioned attic, is an entire new floor of space, for storage etc, for almost no money. Huge win.

I found a bat inside a ridge once when I was roofing hahahah

Sharkskin on top of Foxx? its just at the ridge right, for breathability?

what if my house has metal roof right on shingles thinking about sprayfoaming with closed cell

I would be interested to know how much the roof cost on Matt’s house because all this layers should pretty expensive.

SEEE YA NEXXXT TIMEEEE

If you condition your attic does an asphalt shingle roof still need to be vented or is that just for metal roofs?

👍

My attic above the living part is conditioned with spray foam. My attic above the garage is vented, I hate it. Our house stays very comfortable all times of the year. Our garage and storage above it gets very hot and cold. Since we built 3 yrs ago, we've delt with different issues. A big concern is leakage. We have a drip that comes through the foam, but have no clue where its coming from. There's no vents, or pipes within several feet of where its dripping and none directly up front it. I'm concerned it's going to rot the roof and ruin the foam. My builder said the vents in the garage are adequate for air flow. But the attic above the garage is suffocating during the summer, with zero air flow. My conditioned attic is somewhat questionable. No air gap, no space to stop radiant heat. The foam was sprayed directly to the zip sheeting where you could see the nails from the shingles. We paid good money to have our house built but we ourshelves aren't builders so we didn't know what should be or shouldn't be. Now that I'm taking a look at how our house was built, so many doubts and concerns have come to light. It's a nice house but I'm concerned about what I'll have to deal with in 10-20yrs.

Watching Dr Joseph Lstiburek He talked about this. I guess since your in the south you don’t need to worry about snow or colder temperatures like California. But is it really beneficial to AC the attic. I can see that. Making it another room if you made the height big enough. I hate crawling. The kids definitely love it

Question - I am building a cottage in Canada, Gatineau QC so we will be exposed to both hot and cold extremes. This is a 4 season cottage and I will be using a metal roof. The plan is to have half of the cottage as a cathedral ceiling and other half as a flat roof/ceiling above the bedrooms. I will be using a 5/8" OSB decking with ice and water either on the entire roof deck or at least 36" from the eaves. I plan to use 2-3" of closed cell foam spray on all of the walls and ceiling. I was going to add some 1x3" strapping on the roof deck to screw the metal roof in to. Thoughts? Thanks

I'm a bit confused. Is there a sheeting that goes on roof trusses first before the insulated panels? If I'm building a house with an insulated attic space and a metal roof, what's the best way to insulate that when cold is a bigger concern vs. heat?

How does metal roofing do with hail, like we have so much of here in Colorado Springs?

The only thing I don’t like is using gable vents and ridge vents at the same time. I don’t know how true it is but I feel like at the end of the Gables instead of pulling air from the soffit and just circulates right from the gable vent up into the ridge vent

Spray a permeable membrane before the foam.

What is the best way to condition an attic with new metal roof already in place. There is no insulation under metal. No ac unit in attic. I was looking at Owens Corning membrane against truss and blown in in membrane. Should there be ventilation soffit to ridge vent. I’m in center nc

I'm building a roof with 11-7/8" I joist that will be spray foamed. On top of that I'm going with zip panels, taped and liquid flashed, and then 1×4 furring strips and a metal roof. Would this be adequate in zone 5? Thanks

Dumb question, I'm sure but why doesn't the roof in this video have penetrations for plumbing venting, etc.?

How insulated should the floor joists of a conditioned attic (or the ceiling joists beneath the conditioned attic space) be, relative to insulation at the rafters if this isn't going to be a living space. Also, should there be HVAC vents in a conditioned attic or is the heating/cooling of this space intended to be achieved passively through the floor? My concern is that if the floor of the attic is insulated, and there are no HVAC vents in this space, then wouldn't any floor insulation (ceiling below) effectively prevent passive climate control? Especially if the floor insulation R-Value is close to or greater than the Rafter R-Value, then am I correct that the roof would be, effectively, leaking energy faster than the passive transfer through the floor? On the flip side, if you were to have HVAC vents in a non-living space, it would seem like a waste of energy, though I could definitely see how it would improve the feel for the living space below or adjacent, but again, it seems like sufficient insulation would be a much more efficient way to achieve this. I get that my thoughts above seem to indicate a logical conclusion: Little or no insulation in the floor, lots of insulation in the rafters and passive heating/cooling, likely with no HVAC vents in the attic..... But..... I am asking the question because my home was built in the 5190's, it has a vented attic space with 2" rafters and 2 inch joists between the attic and the main floor. Id really like to convert it to a conditioned attic but as a DIY'er, I am very concerned about my ability to sufficiently airseal a 70 year old space that wasn't initially executed with that in mind. I feel like I, as a DIYer, am more likely to achieve an effective airseal between the living space and the attic than I am between an attic (that wasn't originally built with airsealing as a priority) and the outside world. Or am I overthinking things?

Vented attic is a must to suck out the heat. Solar fan will be good because it does not have that much power like electric one to suck out the cold air inside the house. Wind turbine will also help & should installed more than one. Most people don’t have the money to put metal roof with the insulation between like in this video so ventilate the heat out of the attic is a must, period. The attic need seal if use solar exhaust fan or electric

My roof had styrofoam underneath metal roof deck but no decking to convert roof into shingle roof. My question is the previous metal roof had a continuous ridge vent. Now the roof contractor says it is not needed because of the styrofoam underneath the roof deck. I don’t know if I should take their their word for it.

A semi-related comment: noting that combustion appliances are vented through PVC shows that it is safe to pass combustion gasses through PVC, with little concern for temperature or Static Electricity (more of a concern with woodshop dust collection, but pre-emptively pointing this out). Why don't we use something similar for forced air ducting, especially since a large percentage of air and energy is lost through duct leaks? Of course we would never allow a combustion appliance to leak air in to our living space like a typical HVAC duct does, which is why we don't duct these appliances the same we we do HVAC air. So why do we accept our HVAC leaking conditioned air in to places that waste energy (such as unconditioned Attics)? Why not treat that air the same we we do efficient combustion appliances? With the move to heat pumps and more efficient carbon-based heating, the air temperature from an air handler will not get to a point where it is a danger to PVC (water heaters regularly supply temperature much higher). Why don't we use glued PCV ducts, similar to Water, Waste, and Combustion venting? Would love to hear thoughts from y'all.

How can I find someone that builds this way in SWFL?

Just curious, when you showed the roof from above, you could see different colors of black....This seems to be common in the world of metal roofing which makes me afraid of getting one...Do you carry a guarantee that the entire roof will be the same color?

You've had all those critters in your attic? Someone didn't do a very good job building that home. The only penetrations into my attic are plumbing vents, the continuous soffit vent holes and the ridge vent. There is no gap where the roof and facia board meet. None of the critters you mentioned can get in through those areas. I have a vented attic with one of my ac units located there. I have three more HVAC units in the basement. My house is an all brick and stone story and a half with full finished basement. I used rockwool in the attic and walls. I spray foamed any attic penetrations and I have a styrofoam jacket over my attic stairway. I used Huber Zip on the wall sheathing with tape and liquiflash and Huber Advantech on the roof. I use Huber liquiflash to seal where zip meets top of foundation wall. I used marvin fiberglass windows. I have no bugs and really low heating/cooling bills. What happens when your closed cell sprayed non vented attic develops high humidity in the ridge. Yep, you get rot. I spend the money making sure my duct work is tight and I have more than adequate blown rockwool in the attic. I'd much rather save the money spent on closed cell spray or open cell for that matter and use those funds to install premium windows and ext doors.

Did it creep you out when he was just staring at you at the begining

All Roofs could eventually leak, good luck finding roof leaks..and when u do plan on major issues once u find it..

Should have started out with a MICH lighter colored roof.

Thatch kicks all this new age BS, all over town

Vented attics are dumb? Why don’t you mention the price difference between your attic and a vented attic.

We call this a vented nail base in ohio

Why not show a roof in the background without black mold on it. You’ve got to have attic ventilation in hot humid climates.🤦‍♂️

Would be more educational if more photos and videos were shown of products and install instead of watching you two gentlemen have a conversation about it. Showing is always better than telling - and there is no value in watching talking heads talk about something that could be shown and demonstrated.

You can have a vented attic and make it pest proof. Not that hard.

says the guy who is a paid commercial the has R$$$$$$$$$$ on his house in a place you could live in a tent.

i hate to be this guy. what they are having put in that roof for a 50 year roof baffles me. my home was built in the 60s, it's not insulated very well but vented. Replaced the shingles 2 years ago the roof deck looks brand new. i mean i had about 4 grand worth of shingles and did it myself and my roof deck almost 60 years old and cost 4 grand to make it last another 20 easily.... i know it makes sense building wise, but matts roof with that many details and what he had to put into it...probably 40-50 grand. it better never need another roof

Construction costs have got to be astronomical, with a double roof system, any savings from HVAC from keeping your ductwork cool would be negated by air conditioning the entire attic. I'm sceptical, our laborers here in Florida do not have the talent to build this. Attics are not status symbols, plus conditioned attics can contribute to roof rot. You can keep rodents out of a traditional roof.

Conditioned attic should not be called attic, it becomes part of the house , and should be suitable to be used by human . Think about SIP modular houses

Your attic is a zoo.

The only dumb part of a vented attic is putting HVAC up there. Sure, if you can spend >$10k more and get tons more storage space by doing this. But keep in mind it will not be saving you more than $30 of electricity each month compared to just putting the HVAC air handler in a well insulated space like a basement, purpose-built shed or interior utility closet.

Well I clicked the video to learn more about closes system attic and listened to a guy talk about his root being vented. Great waste of time.

I completely disagree with your closed attic strategy. The science does not support it.

If the attic in this house is conditioned... why is the soffit vented? Shouldn't it be a flush hardy or densglass and have zero ventilation? To me, that's the whole point of an airtight house with a conditioned attic? I'm confused, as a novice.