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Smooth vs Rough Spray Foam Insulation
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- Опубликовано: 16 апр 2023
- Taking a look at Smooth SPF vs Rough and what affects the outcome of these applications? Plus, can rough SPF be Ok?
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Really great video, Mike, as always. Smooth, buttery foam is something of a mark of pride for me and my apprentice sprayer, definitely appreciate the reminder to turn temps down as we head into the warmer months. Now just to convince the boss to buy some new chambers without scratches lol
The guys get all the chambers we want. A wore-out chamber can cause so much frustration. Same with side seal springs, change them often before they lose their spring.
how often should they be changed?
@@WB-qk8tg I've found the side seal springs last a few months before they start getting stiff, but you can compare it to a new one by squishing it between your index and thumb. If it barely compresses, it's due for a change. Give it a look anytime you change the o-rings
what causes closed cell to crack and pull away from the studs in a wall cavity > it looks like it shrunk about 3/16 to .250 and pulled away from the studs the sub straight is OSB
A wet or slightly damp substrate will do that every time. The water dis-bonds the foam and when it cools it has no way of staying adhered to the sides.
Excellent video my friend. When you mention that you are usually spraying at 1000-1200psi is this dynamic pressure (while spraying pulling the trigger) or is this at static pressure (system at idle)? Thank you so much I am a spray tech myself and owner operator and I’ve really enjoyed your videos! You are absolutely helping the industry my friend 🤝
Either. Play with it to find out what it will do and why. Try up, down, cold, hot...
Excellent information. I am planning on finishing my basement 2006 home in New Hampshire. I have many mechanicals close to the wall or on the wall (Boiler for hot water baseboard heat, Rinnai on demand water, radon bubbler, water tank for fire suppression sprinkler system). I am going to have a mechanical section 1/3rd of the basement that will be unfinished. Should I spray foam the finished areas and the internal wall (dividing the unfinished to finished section)? Or should I spray the entire perimeter in the joists but not insulate the walls in the unfinished area? Want that vapor barrier to prevent mold/mildew in basement. Thanks for your expertise!
It would be so awesome if you did a video on the new 2021 building codes and your opinion if they benefit the spray foam industry?
I have yet to see a building code honor what SPF can do.
Love the video.. and I follow them all.
Can you please make a video of how to remove bad SPF due to poor application of SPF in an attic?
Love the videos!
Glad you like them!
I have been waiting on this video. You don't often talk about shaving closed cell foam. I have an aluminum skinned and framed RV. It is framed out of 2" box, and will have 1/2 inch horizontal wooden stringers as a thermal break. I really want to fill the cavity (2.5 inches) to get the most bang for my buck as I plan on taking this thing to Alaska. Are there any specific tools you use when you need to shave closed cell foam?
Nope.
Knifes and try not to need to shave to much. 1/2" extra will be a bugger for shaving, but save you nothing in performance.
If you have a very good foamer you'll only have to shave the sides not the center you really don't want to have to shave all the centers
Question: About to foam a 2x6 exterior wall in South Kansas. Hot in the summer, typically 10-40F in winter. Previous structure was also 2x6 filled with open cell. Would you suggest filling the walls with open cell again or 2-3" of closed cell? Thanks, have been watching on and off for a while now.
Pick one product.
3" closed cell is fine. Caulk the seams in the walls with urethane.
@@SprayJones thank you for the reply. Is filling the wall with 5" open cell an option like the rest of the house is or should it just be avoided on an exterior wall in general?
God I hate spraying foam in the summer when it’s hot and humid. There was a few times this summer I had to remind myself it’s to hot and go shut off the hose heat.
Yup
I see you are in the great white north. I am in south Georgia, insulation zone 2 or 3 depending on the wind, lol. Near Brunswick Georgia do you have an office near me?
No I don't.
I see the installer in a couple of the video clips poking the foam they just layed down, and then spraying over the hole. Is he just checking the mix, or just the thickness?
Thickness
Hi. I have not heard you address this question in your videos. Is it ok to have a large air gap b/w foam and interior heated wall board? I have a steel exterior wall pole barn with 5 1/2 inch cavities. If I spray 2-3” on the steel, I’ll have a large air gap behind the interior wallboards which may be drywall or plywood. Is that a problem?
No, it is not a problem. I do have a video on that. It is in the SPF 101 section about the drywall gap in the wall and if this is Ok?
Once the envelope is sealed you are building inside of a shell.
Hey Mike, I have a ranch style home I’m currently remodeling. I had the whole house, including the roof, sprayed with closed cell foam. The house has a 2 car attached garage where the attic is open to the rest of the house. Should I insulate the ceiling over the garage to keep the unconditioned air in that area from penetrating the rest of the attic? The guy who sprayed it told me that I shouldn’t insulate it but that doesn’t make sense to me.
You MUST separate the garage from the rest of the house. There should be an internal gable within the attic. Spray that with 2" of SPF at a minimum to seal the two spaces.
@@SprayJones Thanks
Do you take stock more so in an ABBA cert or a SPFA one? They both have their benefits and standards just not sure what you guys use.
Neither, we are in Canada.
Both are fine programs and Assoc.
What tip size is spray foam used at? I sprayed bedliners with a 2929 tip but have switched to a 3737 for less overspray.
4242 or 5252 on wide areas.
I hear that 42 is widely used but 52 is what my guys use.
are there any low-rise closed-cell foams that will work well in a cargo van? building an RV in a new Promaster van & don't want to blow out the body panels. thanks, rick
No low rise foam when it comes to pro applied SPF in 2lb.
They can flash coat it to keep it thin and go in low increments.
@@SprayJones, would I be best off using great stuff window & door frames for confined/ restricted areas, then following up with froth-pack 2-part DIY foams kit with thin applications?
How about a roofing foam?
Ever thought about compairing spray foam to hempcrete?
Nope.