ROCKWOOL

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ROCKWOOL

The world’s leading manufacturer of stone wool insulation.

We offer a full range of high-performing and sustainable insulation products for the construction industry.

10/28/2026

Myths scarier than a horror movie

Grab your candy, because this myth is a trick, not a treat.

Myth: "I can just use any ROCKWOOL product in my building, they're all the same, right?"

Truth: Not all stone wool is created the same way. ROCKWOOL products vary by density, thickness, and dimensions, and each building application calls for its own combination of these characteristics. That's why ROCKWOOL produces a range of stone wool products optimized for specific applications, rather than a one-size-fits-all solution.

Don't let a myth trick you into the wrong product.

10/26/2026

Myths scarier than a horror movie

This Halloween, we're busting the insulation myth that spooks us the most.

Myth: "ROCKWOOL products are fire-rated... right?"
Truth: Fire ratings are based on the complete wall or floor/ceiling assembly, not a single product. A product contributes to how an assembly performs, but the rating belongs to the complete assembly as a whole.

Know the facts before you build.

10/23/2026

Behind every quality install is a contractor who cares. Who builds like it's their own home. Who refuses to compromise.

Every batt is one piece of the puzzle. Placed with care, they come together into a complete system, one that keeps performing year after year.

Comfortbatt and Safe'n'Sound insulation help make your home whole.

Tag a contractor who builds to this standard.

10/22/2026

What's the first thing to fail when wildfire reaches a home?

It's usually not the walls.

It's the openings and the in-between spots—a vent, a window, the junction where one trade's work meets the next. Embers find those gaps, and a house can catch without a flame ever touching it.

That's the part that can be easy to miss: fireproofing one component isn't the same as protecting the building. The enclosure has to work as one connected system—insulation, windows, and the details that tie them together.

Join ROCKWOOL and Cascadia Windows & Doors for a live session on wildfire-resilient construction in Wildland-Urban Interface (WUI) zones. You'll earn 1 AIA credit, and walk away with details you can actually use.

If you build or design in a fire-prone area, what's the detail you worry about most? We'd love to hear it.

November 10 2:00 p.m. ET / 11:00 a.m. PT
Register now: https://rockwool.link/VUQ2AZ

10/21/2026

EIFS has a reputation, and a lot of that reputation is decades out of date.

In this clip from Rob Klein's 2024 ROCKonnect session, he explains how modern EIFS with drainage manages moisture and leaves the old problems behind.

Where do you land on EIFS today, come around, or still cautious? Let us know.

10/20/2026

Moisture damage on an interior-insulated mass wall? You usually don't see it until it's expensive.

Smartrock is built to stop that damage before it starts. It fastens right to masonry, concrete or CMU, and its smart v***r retarder reacts as the seasons change, so the wall dries instead of trapping moisture inside.

R4.2 per inch. V***r control. Air control layer. One board, retrofit or new build.

Tag someone who's fought a mass wall moisture problem in the comments below; this could be their new solution.

10/19/2026

Open-joint rainscreens have a catch: you can see the insulation through the gaps. Most boards need a cover layer to hide it. Cavityrock Black doesn't.

On one of Arizona State University's research buildings, the black facer was made to be seen, crisp black lines behind the joints, standing up to heat, UV and rain, with R4.3/inch of continuous insulation behind it. No extra cover layer. One less step, same clean look.

Watch how it works in the animation, then see the full case study at the link below.

https://bit.ly/46VjRZF

10/16/2026

You know that satisfying growl some motorbikes make—loud, but not eardrum-shattering?

Somewhere inside that muffler, stone wool is doing the quiet work: absorbing sound and shrugging off exhaust heat that would melt most materials.

It doesn't stop at mufflers. The same material turns up in ovens, ships, factories and the walls around you—same stone wool, different job every time.

Where would you least expect to find it?

10/15/2026

There's more going on inside your exterior wall than you might think.

In this ROCKonnect Recap from his 2025 ROCKonnect session, Steven Gaynor explains how rainscreen walls manage moisture and v***r, and why fireblocking them properly is what keeps them safe.

It might just change how you look at exterior walls. How would you handle fireblocking on yours? Tell us below.

10/13/2026

Insulating a concrete or masonry wall from the inside? Here's the part that trips people up.

Adding insulation keeps the room warm but makes the wall run colder, and cold walls are where moisture wants to sit. The instinct is to seal it out. The catch: a wall that can't dry in either direction just holds whatever moisture it starts with.

Stone wool plays it differently. It's v***r-open by design, so it does the thermal work while letting v***r move through and never traps moisture in the wall.

That frees up a smart v***r control layer to do its thing: tighten up in the cold to keep moisture out of the wall, then open when it's warm so the wall can dry inward.

Two jobs, two materials, one dry wall. Smartrock builds both into a single board, or pair Comfortboard or Cavityrock with a separate smart retarder. Either way, the v***r goes where you want it.

Address

8024 Esquesing Line
Milton, ON
L9T6W3

Website

http://www.rockwool.com/north-america

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