Insulation: Mineral Wool vs Fiberglass

[@IAmMrTrumpet]

Broken water pipe would be another scenario where this would be the better option. Learning a ton from this channel, keep it up!!

[@DS-zy9kq]

It might be very useful in humid southern climates in crawl space. Humidity has a way in my area of causing insulation to get soaked and fall out of sub flooring spaces. It also contributes to crawl space mold issues. How about the cost comparison?

[@karlhungus545]

I have used Roxul in my last 2 builds, and 2 renovations going back to 1999. I will never use fiberglass again. Cheaping out on insulation is just dumb. It's the cheapest material in a house build, yet it is far more valuable than it's cost. One thing not mentioned (the reason I started using it...Canadian prairies) is that it doesn't compress or sag like fiberglass (irregardless of moisture), which maintains the R value that you're paying for. Contractors don't EVER install insulation properly either...I always do it myself.

[@johnwhite2576]

Re r factor , mineral wool retains its r rating over time , doenst get wet, collapse/compress …but it’s 3x the cost….

[@pavgup]

I'm really curious, do the name brand options provide a better option than something more generic?

[@johnwhite2576]

Turns out though mold grows quite well,on dust which will accumulate on any fibrous insulation-wood , glass, wool, hemp etc.

[@bartholomewcubbins9723]

If I wasn't using mineral wool everywhere in a house, I'd at least use it in the locations most likely to see water leaks --- floors under bathrooms and laundry areas, walls behind tub and showers, and walls below windows. Closed cell spray foam isn't harmed by water either but it doesn't allow water to drain or dry out the way mineral wool does.

[@rangerdoc1029]

This is why I use open cell spray foam.

[@KeyLew]

Thanks for the information.

[@kristofferholst6053]

As early as the 90’s Production started in Denmark in the late 1930’s I get that you were probably talking US but the history of Rockwool is older

[@jbranche8024]

He should have weighed each piece before and after placing under water to give more supportive information at water retention

[@lvtflooringstore7687]

very good points for reason to switch to mineral wool

[@ajhelmink]

whats the difference between rockwool and mineral wool?

[@ameliabyrne3907]

Is the mineral wool totally waterproof? So it won't absorb any water ?

[@rogacz962]

No, it isn't.

[@ismersh]

Yes rockwool doesn't abosrb as much water as fiberglass, but what you didn't mention here is that rockwool stil absorbs some amount of vapors/humidity/water, and once it absorbs even a small amount it can't let to go as easy as fiberglass does. If a builder didn't install rockwool tight enough even in a few areas, these areas will become cold bridges, this means that at these cold bridges the cold and hot air are going to meet and condense which means that the vapor from is going to become water. Once it becomes water there it takes much more time for rockwool to dry out comparing to fiberglass which leads to mold formation in the areas where it absorbed water. Once you have mold on the beams surface your house is going to start roting slowly.

[@OpenBookBuild]

You totally missed the point here. Regardless of whether the fiberglass “dries out” it will completely lose its ability to insulate. And, mineral wool will not have gaps…it’s much easier to install and inspect over fiberglass insulation. There is no comparison from a quality perspective

[@rogacz962]

This is wrong. There won't be condensing water, because there won't be vapour in the air. Both mineral wool and fiber glass are vapour permeable and absolutely necessitate a vapour barrier on the inside (and in some climates active barrier on the outside), which limits diffusion of moisture. If there are thermal bridges, the condensation will happen on the inside of the envelope. And the same is true for fiberglass, poly, foam, cellulose and all the other insulation materials that would not be installed properly.

[@ELIRAXPRT]

I find it to not be as itchy as the fiberglass. Fiberglass can have the vapor barrier face built in which mineral wool won’t have so you have to put up a vapor barrier separately here in my climate zone

[@bartholomewcubbins9723]

Could you speak to the cost? I have heard that insulation contractors buying in bulk from distributors are able to buy insulation for much cheaper than an individual homeowner can. The result is that it might be less expensive (or only a bit more) to have an insulation contractor buy AND install the insulation than to go out and buy it yourself.

[@rangerdoc1029]

I found that to be true when I built my last house. It was cheaper to have a contractor do the insulation than to do it myself.

[@chrisvalen]

So dont use spray on or foam insulation?

[@tina-ij2ko]

Watching from Hong Kong 🇭🇰 💕 .

[@huckfin1598]

You also don’t have the risk of this stuff destroying your lungs

[@grantguy8933]

👍

[@tszymk77]

Mineral wool is our friend.

[@postmodgent1499]

be careful don't interchange "mineral wool" with "rockwool/roxul" similar but different products.

[@mankind5709]

Very dusty installation, well worth it, sound proofing is unnerving.

[@johnwhite2576]

Straw man comparison-nobody serious uses fiberglass Matt’s-the real comparison is with dense pack cellulose- please do a video on that-

[@g.a.little2610]

Has anyone here bought his class?

[@BrogeKilrain]

Do a video on the new Biden green home and building mandates. Many cities and states including NYC have adopted. Soon you can’t even buy gas heating or hot water heaters . Heat pumps mandated .

[@grantguy8933]

Maybe only NYC or those democrats area?

[@BrogeKilrain]

@@grantguy8933 No will be nation wide 😵 look up ITHICA NY green agenda

[@BrogeKilrain]

He explains it and if u don't believe ask a local HVAC tech kzbin.info/www/bejne/q3elkoCkpd2Df8k

[@bartholomewcubbins9723]

What Biden green home building mandates? Can you provide a link to these regulations or are you just making things up?

[@corbonzo1]

Lets see some sources because this sounds like BS

[@KASmonkeys]

Except for cancer! lol