It is back to Nature. The raw material is basalt rocks and chalk. These are melted at 1600 C°. The lava is blown into a spinning chamber, which pulls the lava into fibers, much like ‘cotton candy’. When Mother Nature makes this wool we call it ‘angel hair’. If you have ever visited a volcano, you may have seen the fluffy angel hair flying around.
We pack the fibers together into a mat and cut GRODAN slabs & cubes from it. The stone wool Granulate is bags with little flocks of 'angel hair'.
Important facts about GRODAN stone wool
GRODAN stone wool was developed in Denmark in the early 1970's.The process makes excellent use of nature resources; We can produce 37 cu.ft. of wool from 1 cu. ft. of rocks.
Today we repurpose used GRODAN into bricks or other kinds of products. Even part of your new GRODAN is produced from recycled GRODAN.
GRODAN stone wool is the main reason that most of the world’s greenhouse vegetables are now grown hydroponically.
At full saturation, GRODAN holds approx 80% of its volume in water, leaving 20% of tiny air pockets. It is wrapped in UV-degradable plastic and the stone wool can be re-used in your garden to improve the aeration and water holding capacity.
GRODAN stone wool went into space on Challenger in 1986 and is still being used in NASA's testing with hydroponics.
You will also find GRODAN products at the EPCOT center / Walt Disney in Flori