Good luck with finding a roof leak and by the time you do there will be more than 1 board to replace. Plywood even more . Why not pull attic floor and add 2x4 to the top of each floor joist re-install floor then insulate. Install soffit insulation and ridge vent. Make sure that you have 6' of ice and water shield under shingles. Oh I forgot... that doesn't sell foam insulation .

I've been a builder for many years and have seen quite a fair bit of sheds. The plans in ryan's package kzfaq.infoUgkxB7IXYxLzb_Ichhe45zM3Im5xfEiSp9vB have some of the nicest looking sheds i've seen in a while.

When I contacted Owens Corning about air under the shingles, they said if you spray like this, you will shorten the life of the shingles on the outside of the house. Air damns need installed from soffit to ridge vent, then cover with insulation. This allows air to move via convection from the soffit up through the ridge vent, keeping the shingles cooler and getting the max life out of the shingles.

oh my the amityville house!

goodness - this is an issue i am trying to remedy NOW :) Tks YT suggesting vids for me

thank you!

If you're looking to prevent ice dams air seal the floor in your attic. Light fixtures, interior walls, plumbing stacks, bathroom vents, etc. You don't need to spray 2-lb foam to the underside of your roof deck unless you want the attic to be conditioned space.

Looks great feels warmer already, wasn't the attic being to warm the problem to begin with?

Brilliant material

I swear, 15-30 years from now there's going to be commercials on TV of a lady asking if you or a loved one has been around spray foam insulation resulting in cancer and to give them a call for a cut of the compensation. It's going to be right up there with mesothelioma/asbestos.

I am still learning in my 26 years of working through so many types of roof problems. The solution always depends on many variables. Unfortunately the way we build tends to lead to all sorts of problems for which solutions vary.

Is it possible to heat under the overhang? I'll be doing closed cell inside the attic but I want to encourage the snow to come off my roof.

I find even a well insulated home has ice dams. Mine seem to occur when there’s snow on the roof and then the sun comes out. Even on very cold days there’s snow melt and then when the sun shine stops we get freezing eventually if we haven’t had a substantial warming to melt everything off the roof an ice dam forms. How do we battle these?

Cna this be done on houses with soffit vents?

Glad they talked about fire risk with synthetic foam

This guy knows it all 👍👍👍

I'm not a huge fan of spray foam for a variety of reasons, but it is good in specific applications where more r-value per inch is necessary.

I agree with everything that you said, but I am not a fan of spray foam. I would have screwed 1x3 or 2x4 (home owners choice, I have done both) horizontal 16 inch on center. Installed rafter mates (tunnels) and installed insulation then drywall. Also you must have vented soffits and a ridge vent or gable vents. Problem solved

Can I use spray foam if I only have a ridge vent ,and how far do I go with it.

Is this good to use under a metal roof?

I wonder if any bumps created under the shingles because of expanding foam. There must be some gaps on the roof deck where foam expanded towards outside.

That's a beautiful attic.

Insulation is important but the water doesn't stop at the bottom edge of the roof, it stops in the gutters and freezes. It builds up in the gutters until it reaches the top of the facial board. Then the ice crawls into the gap that is between the top of the facial board and the roof deck, then it fills up the soffit, then enters the house. When it reaches warm air it turns to water. Even if it gets under the shingles there is ice barrier at the bottom edge not felt paper. Code in any snowy region is two passes of ice barrier at the bottom edge of the roof then felt paper the rest of the way, anything under a 4/12 pitch gets completely covered in ice shield/barrier. To prevent this from happening you need to remove the gutter, install new ice barrier but this time leave 3 inches of ice barrier hanging over the bottom edge. This then gets folded down over the facial board or aluminum then install the gutter over the ice barrier closing the gap between the top of the facial board and roof deck. That's the correct way. It's all about doing it right in the first place.

Do i cover my artic vents in winter to keep the cold out ?

How does roof vent work when you spray foam it all up like that ?

Is diferent ways to do .all depend on what state you live ..every person or company work diferent and every state have diferent rules

Something to watch for when it comes to these companies that use spray insulation, is that they often "fluff" the insulation in. For example ...when you're looking at adding 10 lbs. of insulation, what they often do is use only 5 lbs., and then charge you for that 10 lbs.

So not only are you conditioning the space, but you're preventing that warm air from escaping the attic and warming the roof, right?

Is spray foam resist with water?

ok, I get that and salt is rusting nails and gutters but is salt bad for the actual shingle?

Great for those of us that own old 1 1/2 story homes but what about air flow under the roof? Should there not be a baffle so air flow can come up from the soffet and out the roof vent or was this because there was no real attic

I dont understand, what about soffit vent baffles running to the ridge vent? Are they needed?

With closed-cell spray foam being a vapor barrier, are you worried about moisture getting trapped between the roof deck and spray foam? If so, it would rot out the roof decking.

What does it smell like when they are done spraing that foam. 🤘😎💨💨

You need 2 inch gap on the rafters for ventilation from the soffits. You can then apply your insulation. Just a matter time for the wood boards to be rotten.

wont the foam close in the wood and it will cause moisture

So does keeping the windows in attic open in the winter helps?

A good dam video...

Fiberglass insulation on top of a leaky floor in the attic may do nothing but redirect air leakage to the eaves, making the dams worse. Conflating air sealing with insulation is perpetuating dogma. Nice lesson on Ice Dams but incomplete. Wish they'd done a better job distinguishing between stack driven air leakage and heat loss. Redefining attics with foam is a FANTASTIC home improvement - If you have comfort issues this is likely to significantly improve comfort in the rest of your house too. Overfilling 2lb foam and shaving is overkill imo. Folks, most of your performance problems are due to air leakage, not insulation levels.

What is half inch wall wood?

This foam was all the rage in the UK about 15 years ago.......until rafters began to rot away about 5-10 years later. No one uses it any more.

Now with the spray foam you’ll never see your roof leak until it’s completely rotten. Most roofers won’t warranty a roof with spray foam insulation

Are you sure that is closed cell. I am no pro but i that stuff that you guys sprayed expanded like an open cell.

Get your attic properly insulated and keep your gutters clean.

That spray cell foam is very flammable. Very good insulation though.

What about venting to the ridge vent?

Be sure to check your local building codes, they vary from state to state, province to province, country to country.

Foam with not vents will fry the shingles

Or just install an ice shield rubber adhesive barrier strip on the plywood along the top edge of the roof.!

Question... None of the wood in my home walls are vented. They are sealed in tight, wrapped in foam insulation outside and then with vinyl and inside with drywall and years worth of non-breathable paint. Why don't these studs rot?

In Alaska, you better baffle that roof sheathing with eave vents, because even R38 ain't gonna stop it.

May seem like a dumb question.... But if they did all that why not just finish that area to the right at the end of the video.

How do you know if there is a roof leak?

What was used for the wall board?

But what about venting for cat condensation super important

Of course the rafters are still exposed and therefore transfer some heat, so might as well toss a layer of XPS on it also before the drywall.

Talk about Over Kill! Reg. 6" Insulation in the Floor with a 6 Mill Plastic Sheeting stapled down, seals any air leaks. Top Off the Floor with simple 1/2" Ext.GradeSheeting for a Finished and safe floor ..Vent the Attic! With Gable End Vents + Mushroom Vents in the Roof every 5 ft.. Has been good enough for decades!

What a shame to see that beautiful wood roof and structure being ruined with that foam. When you'll want to replace a piece or intervene on the structure, good luck getting rid of that stuff.

Spray foam like that just tickles me the wrong way.. what if they install it wrong and some of the foam doesn't set and cure? What if I get a roof leak, how will I find it before it become a problem? There has to be a better way. I don't like permanent spray foam.

I thought if u use spray foam it's difficult to sell your house

Wow. There are a lot of people commenting here that are really ignorant about how this system works. They want to keep applying attributes of conventional insulation methods to the spray foam methods. They are nothing like each other and the weaknesses of one don't apply to the other and vise versa.

Lots of comments about whether this was the right thing to do or not. I only have two words about this project. Thermal bridging. In the north, it's an issue.

Spray foam most certainly is a do it yourself job. They sell rather large kits of the 2 part mix for this. It is indeed marketed directly to homeowners, and it's not that difficult. TOH is supposed to be a do it yourself show but it seems like mostly they just say "hire a guy". This was a big job and maybe better hired out, but you can definitely do smaller areas quite easily and relatively low cost.

Old Historic House Owners: if you want to list your home on the historic registry, DO NOT use any spray foam insulation before you FIRST check your state codes. Also, if you have an original self-ventilating slate roof, understand that this is NOT a good idea!

Not from Canada that's for sure!

Construccion

Always befriend your local building-code inspector and then have an adulterous affair with his wife.

how do you feel about radiant barrier attic insulation? Is this a good solution you use?

Imagine all the other costs associated with this property! You would have to have a TEAM of gardeners for example.

I was told that the insulating spray foam wicks water / moisture...is there another product? And what about the chemical off-gassing of the spray foam, especially if it is applied too thickly?

I think glass wool is better

No baffles?

No rafter vent?

Not the cheapest solution either.

Use much longer shingles.

this method has mixed reviews. some say that it decreases the life of your shingles and then some say that it doesn't hurt? anyone know the truth?

There goes your shingle warranty!

Why don't you show putting up the half inch whatever you said to make it up to code?

I always thought you never install insulation on the roof itself??

Spray foam is way too dangerous because if the sprayer applies just a little too much it could give off toxic fumes for a very very long time making the whole house uninhabitable. Hard foam panels also have a high insulation and is fairly thin. Thicker isn't always better.

Great so now i get the foam insulation for surrounding walls and between rafters if your making your attic a live in attic but still when you go with a blown in vs a foam insulation. I get when to uses roll out insulation with paper just not when to use blown in or foam for rafters and surrounding walls of floors... If there is even a significant difference other then getting the right R value for insulation quality.

better off building a double roof. Put 1 feet of roxual on the outside, 6" in the rafters, then 6" sofit gap and then another roof with shingles.

Who does not put insulation in the attic? Loss heat

It's not fire proof?

And this is why I cannot stand home improvement shows. The only thumbs up I can give is he said a proper spray job is not a DIY project.

I heard nightmares about spray foam causing sickness. Where were the vents from the soffit to the Ridgeline? oh well.

These guys replying to this video are ignorant to the fact that venting is only needed if the heat would travel to the shingle from the house. With this system that will not happen. also the shingle are a breathable system especially with the breathable underlayment being used by industry pros. unless you have ice and water shield going on the entire roof deck you won't have a ussue with this system.

F that code.. is the county paying for the extras 🤔

Never use toxic spray foam, use foam board if you must use a foam product

Very poor method of insulating the underside of the roof. It should have first had air baffling installed to keep the foam directly off the wood decking.

Don't use shingles.

What about just using string to hold up your sheets of insulation ? Dont get me wrong I like the idea of the spray foam it just seems to be a more practical full coverage and quicker process without having to play in some insulation fiber but if your using the fiber r brand stuff insulation pink pillow rolls then you can staple it up or staple s few lines of string up against the framing whatever depth you think holds the insulation at its proper best functioning place and itll hold that shit it those stud bats until you board it up I'd save a little and use some cheaper 1/4" board sheet rock probably go lighter then that myself and use just quarter inch sheets of the cheap press board or that tack board stuff from home depot its only got to be a barrier for the insulation to be kept to it's own engineered thermostat before it will ever fall/flake apart getting into any valuable breathing air so just do a good job at whatever your doing if something don't make sense ask a friend or meet a new one maybe a neighbor you drive past every day is a construction guy and you see the material in the truck so just ask questions be friendly ask someone who knows what they are talking about and who speaks proper English and if you hire someone do the same and remember you usually get what you pay for who does the job best who do you know you can trust more? Cmon now folks stereo types are usually for a reason it does not make you a racist asshole bigot to do what you know and say or express or fight or build for what you know is real and what you know has been in a down fall for all the ways ..... you already freekn know rightfully said and you can not deny the way you feel as if shits going to hit the fan on your lifetime this coming time so use the real common sense to get the facts straight open your dammed eyes and only speak up when you know the ways of another the ways of a free peaceful happy safe nation are being intentionally infringed upon this is evil vs good no matter what you believe you are apart of a system built on a planet that will self destruct by means of an outside force evil and it seeks to destroy your any chance at water getn thru and molding your weak roofs ..... build a solid foundation there are times to go easy and times to build hard for to better take the fowl weather the first thing to mind is usually your concious from your inner it just is heard in your open tolerant to temptation brain because that's where your ears of your body are try hearing as well with the one thing that you actually have any chance at keeping healthy free of rot and mildew and no leaks unless you just build yours like a lazy lieing..... fool

I'll be here tomorrow to answer all the ridiculous theories to do with spray foam. Looking forward to all the bogus comments !

Remember guys, a minimum of Ah 38 👍🏼

The rafters can’t breathe with that foam ‘ they will choke to death and your roof will fall in ‘ timber is like ourselves it needs to breathe

put on a metal roof and you will never have an ice dam again.

Why don't they just manufacture a double height shingle for the overhang?

I was just thinking that sounds like a little song that you would sing to a child preschool

Cover area with 1/2 wall wood?? Ton of work, I’d just insulate the ceiling attic and not the roof...

If you get any leak from that roof, the closed cell foam will hold that water to the underside of the roof and you will rot it. Bad advice.