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Cellulose literally breaks down/ disintegrates every year until eventually it's all dust

Cellulose literally breaks down/ disintegrates every year until eventually it's all dust

This was very helpful. I bought a 1965 house with replacement windows, but they leak really bad in the bedrooms! I’m going to carefully remove the trim and add insulation to the frame. Thank you.

This test is flawed, the cellulose clearly has more material between the measuring spot and the heat source. The fiber glass doesn’t appear to be flush with the glass allowing light to travel through, thus heat.

We observed that cellulose has more thermal mass, not that it is necessary a better insulator.

Great vid, one of the best. Right to the point and as clear as it gets

The reason the fiberglass performs poorly is the density. Tge cellulose is far more dense. Reducing the amount of in-between. Its the air that transfer the temperature

Why are the thermometers in the middle of the insulation? Shouldn't they be at the bottom of the insulation? If not under a layer of sheathing and a layer of painted sheet rock?

Isn't that test a little biased as heat traveling via light rays can penetrate further into the more transparent material. Wouldn't the test be more accurate if the heat lamps were shining onto an opaque surface and then transferring the heat from there? Would resemble a closed cavity just like you'd find in a wall or ceiling.

I thought the purpose of the baffle was to release hot air from the attic? ---Also, I would have liked to have seen what you are covering the baffle holes on the fascia with ? some sort of screen im assuming

question: Do I install baffles in all rafter bays or only the bays that have screened vents?

Can I use spray foam (from a can) to seal the soffit intake like your example, place baffles like your example (i.e. not filling entire width of rafters) to the top of my roof, but then use batting insulation to run up the remaining roof line? I have a cathedral ceiling with a ridge vent at the top that I am insulating then drywall. It's a 2x4 rafter so I will use R15 with a kraft paper backing. This is a "shed to cabin" conversion. Thank you!

Haha good one at the end there! Lol

Super Reportage. Wake up. Fiberglas and rockwool are not first Order. 👍👍👍🇩🇪

"the air can only go through the top of the baffle" shows smoke escaping from the sides

What would the temps of both be after several hours? Just imagining a hot day where your attic temp rises through the mid afternoon sun. Then as it cools down, which cools down faster?

Great mock up . Is it advisable to add a poly 6ml. and tape it before drywalling the ceiling? I have a "hot roof" and I've added the vents, but found the condensation building as I put the poly over the "pink"

Good explanation of Cellulose vs Fiberglass! Any input on the mineral wool style insulation?

With the fiberglass batt, do you have a wind blocker or any folded plastic? Is it just the fiberglass directing the air flow to the baffle?

“Apologies for the length of the video but sometimes I just have to VENT..” 🤣 Somebody install a radiant barrier on this guy because that joke was HOT HOT HEAT!!🔥

I never seen a foam on a vent before. Most of the spray foam guys want to apply it directly to the rood deck with no air flow.

Roof, not Ruf Funny Americans

Question? Does a person need to put a baffle between every joist or just where there is vents in the sofit?

Thank you for this! I have a house with a room that was originally a covered patio. The ceiling in that room is a drop ceiling, so the airflow that comes through the soffiting and into that ceiling is pretty unrestricted because there's no drywall or wood to it -- just some fiberglass insulation and drop ceiling tiles. It's less than ideal. I'm looking to correct this and couldn't remember the term "baffle" (I'd seen it in another video but couldn't remember the name).

Jeff, great presentation and demo!

Thanks for the video I was baffled

This is an excellent mockup you've created and this video is much needed. Thanks for making it!

That was baffling.

Can you tell me why the baffle doesn't extend across the entire area between rafters? Wouldn't you want air flow to be under the entire roof and not just some of it?