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What are the benefits of rockwool insulation?

Rockwool insulation is an alternative to traditional fiberglass insulation. Rock wool adheres to the textured backside of some drywall finishes. It also has some heat-reflective properties, which help keep room temperatures more constant for better air conditioning efficiency savings.

Rock Wool insulates better than fiberglass because it expands up to three times its' original thickness once wet, making it resistant against shrinking during drying cycles.

The processed rockwool material is environmentally friendly with no harmful byproducts or potential fire hazards found in glass wool or foam insulation products. There are no metal parts that will rust and there are no holes for insects to use as entry points into your home!

Even though thermal conductivity varies between different brands, most rockwool insulation products have R-values that improve by about 30 percent when wet, keeping your home more comfortable and energy efficient.

Rockwool is resistant to moisture absorption up to 40 percent of its weight before it becomes saturated. This feature provides for greater resistance against water damage in the building envelope .

It's great for use in both above and below grade applications, as well as interior walls. It will not promote mold growth nor encourage insects to create homes inside your attic or wall cavities.

I have read that this mineral wool is an environmental hazard, so the benefits are limited. True? False?

False! Rockwool insulation is made from natural, nonhazardous materials that are 100 percent recyclable.

The EPA (Environmental Protection Agency) has labeled rockwool insulation as "a low hazard material with no adverse effects in its use or disposal."

Rockwool insulation is an insulator so it is not considered a hazardous waste. The EPA considers rockwool fibers to be solid waste when they are removed from the insulation product during clean outs and renovations. However, rock wool fibers are very small and can pose little threat in these circumstances. Further information on the safe handling of this material can be found on the U.S Green Building Council's website.

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How does rockwool insulation work?

Rockwool is made from rocks and it's a by-product of the steel industry. Before they can get to the molten steel, large rocks called "slag" must first go through an intense heat bath in order to clean them of dirt and other impurities that would clog up the smelters if included in the steel.

This reduced recycling effort is another one of rockwool's biggest advantages: when someone burns their carpet in their fireplace or sofas on Boxing Day, for example, all those fibres release chemicals into the air -- but with rockwool insulation, nothing but pure grey soot comes out when you burn it. Rock wool also has no texture like fiberglass insulation does -- rock wool is smooth and completely inert.

Unlike fiberglass insulation, rockwool can be installed into walls that contain water for extended periods of time without the material becoming damp because it doesn't absorb moisture like fiberglass so this makes it an excellent material to use in walls surrounding boilers and furnaces where high humidity levels are present.

As explained above, Rock wool insulation is made from rocks and a by-product of steel industry and it works by trapping air in its fibers providing thermal resistance in walls .It does not absorb any moisture and will not rot. Unlike other types of insulation which may become damp when exposed to excess humidity levels, rockwool insulation is completely inert.

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