What is the R-value of Rockwool?

While fiberglass insulation is capable of offering an R-value of about 2.2 to 2.7 per inch of insulation, Rockwool has an R-value between 3.0 to 3.3 per inch of insulation.

What is the R-value of 3 1/2 inch rockwool?

Rockwool or mineral wool insulation offers an R-value of 3.0 to 3.3 per inch of thickness. While it costs slightly more than other common insulating materials like fiberglass and cellulose, it provides far greater thermal efficiency, heat retention, moisture resistance, and sound-dampening capabilities.

What is the R-value of 4 inch rockwool?

The 4" thickness provides both excellent sound absorption (NRC 1.10) and thermal insulation (R Value: 16.8) which makes this a very popular product in both the acoustical field as well as the industrial insulation industry.

Is rockwool good insulation?

Rockwool insulation offers several advantages, such as excellent performance in terms of both thermal and noise insulation. It is also quite durable and resistant to fire, mold, mildew, etc.

Do I need a vapor barrier over rockwool insulation?

Mineral wool typically doesn't require a vapor barrier. Its high-density level allows it to absorb moisture before it has a chance to penetrate the interior walls of the foundation.

We’ve added more ways to meet R-value codes

How thick should rockwool insulation be?

As such, recommendations are as follows: 270mm for glass wool insulation. 250mm for rockwool insulation. 220mm for cellulose insulation.

What is the R-value of 6 inches of ROCKWOOL?

While fiberglass insulation is capable of offering an R-value of about 2.2 to 2.7 per inch of insulation, Rockwool has an R-value between 3.0 to 3.3 per inch of insulation.

Is ROCKWOOL better than fiberglass?

While, both unfaced fiberglass and unfaced mineral wool are noncombustible and help delay the spread of fire, mineral wool does have a much higher melting point than fiberglass, and as such it is often considered the more fire-resistant material.

Is ROCKWOOL good for attics?

This is one of the most cost-effective areas to add insulation. Use ROCKWOOL thermal stone wool insulation to insulate the attic of a new build, extension, or to increase the R-value and top up the current attic insulation, especially in an older home.

Will mice chew through Rockwool?

4) Are ROCKWOOL products rodent resistant? There is no test method to determine whether or not any product is rodent resistant. ROCKWOOL's reputation as a rodent-resistant insulation is mainly based on word of mouth and lack of negative feedback from numerous customers who use our products in “cottage country”.

What is the R-value of rigid foam board?

Extruded polystyrene: Extruded polystyrene (XPS) rigid foam is usually blue or pink in color, with a smooth plastic surface. XPS panels typically aren't faced with other material. The R-value is about R-5.

What is the R-value of 14 inches of blown insulation?

Cold Climates (R-49 to R-60):

Fiberglass (batts): 14” – 19” Cellulose (blown): 14” – 18” Rock Wool (loose): 17” – 25”

What is the difference between rockwool and mineral wool insulation?

Mineral wool uses mineral waste residue as raw material, rock wool use basalt as raw material. Second, the operation place is different. Mineral wool is widely used in industry area, rock wool is widely used in building area.

Is rockwool insulation good for exterior walls?

ROCKWOOL ROXUL SAFE™ 55 & 65 are medium-density insulation products for interior and exterior firewall applications where fire resistance of at least 1 hr. is required.

Can I mix rockwool and fiberglass insulation?

You can combine different types of insulation as well as different installation methods. So, if you already have blown-in fiberglass in your attic but need to add more insulation, you could lay down rockwool batts if desired.

Can I put rockwool over fiberglass insulation?

Even though the fiberglass is getting slightly compacted by the mineral wool on top; the minor R-value that may be lost to compaction is easily outweighed by the increased R-value of the extra mineral wool.

Is rockwool more expensive than fiberglass?

Mineral wool insulation is about 25 percent more expensive than fiberglass insulation. Fiberglass insulation typically costs about 50 cents per square foot, while Rockwool costs around 72 cents.

What is a good R-value for exterior walls?

Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy's (DOE) ranges for recommended levels of insulation below.

Can you cut rockwool in half?

Yes! In fact, ROCKWOOL makes a special installation knife designed specifically to cut it. You can also use a knife with a serrated edge to cut through it.

What temperature does Rockwool burn at?

Make your fire-first application even safer.

ROCKWOOL ROXUL SAFE^TM products have a melting point of up to 2150°F (1177°C) and will not develop smoke or spread flames when exposed to fire. Contribute to enhancing the efficiency of the building envelope – lowering your client's long-term energy costs.

How do you hold Rockwool in place?

1. MECHANICAL ATTACHMENT For permanent attachment, ROCKWOOL stone wool (mineral wool) insulation should be mechanically attached or pressure held by supporting members. 2. ADHESIVES Adhesives and adhesive applied stick-pins should NOT be used for permanent attachment of ROCKWOOL stone wool insulation.

Is rock wool asbestos?

Rock wool (RW) is a kind of asbestos substitute and is widely used in the construction industry, in particular for fire-resisting insulation, thermal insulation, and acoustic absorption.