8 Ways to Cut Rockwool for Insulation

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8 Ways to Cut Rockwool for Insulation
8 Ways to Cut Rockwool for Insulation

Video: 8 Ways to Cut Rockwool for Insulation

Video: 8 Ways to Cut Rockwool for Insulation
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ROCKWOOL, formerly known as ROXUL, is a material commonly used as building insulation, such as houses and high-rise buildings. When you want to use ROCKWOOL for the first time, it's natural to wonder how to cut it properly because this product is usually sold in rolls or large sheets. Do not worry! Find the answer in this article. This job is not difficult and can be started at any time.

Step

Question 1 of 8: What is the most appropriate tool for cutting ROCKWOOL?

  • Cut Rockwool Step 1
    Cut Rockwool Step 1

    Step 1. Use a serrated knife to cut drywall or bread

    ROCKWOOL sheets are made of soft fibers and are very similar in texture to slices of bread. Use a serrated knife to make the ROCKWOOL easier to cut. You are free to choose the cutting tool you want to use.

    • Manufacturers recommend a bread knife as a ROCKWOOL cutting tool because it has a bread-like texture.
    • Cutting ROCKWOOL is even faster if you use a drywall knife.
    • Some contractors prefer to use a small manual saw for cutting ROCKWOOL.

    • Question 2 of 8: Can ROCKWOOL be cut with a kitchen knife or razor?

  • Cut Rockwool Step 2
    Cut Rockwool Step 2

    Step 1. The manufacturer of ROCKWOOL does not recommend using a flat blade

    Kitchen knives, razors, and cutters become dull faster when used for cutting ROCKWOOL. In addition, a flat blade can damage the ROCKWOOL sheet. To prevent this, use a serrated knife instead of a flat knife.

    Question 3 of 8: Is there a quick way to cut ROCKWOOL?

  • Cut Rockwool Step 3
    Cut Rockwool Step 3

    Step 1. Yes

    Professional contractors often use electric knives to get the job done faster. Cutting ROCKWOOL manually takes a lot of time and is very tiring because you need to move your hand back and forth again and again. So, use another method if there are quite a lot of ROCKWOOL sheets that you want to cut. An electric knife is the best solution. In addition to chopping turkey, ROCKWOOL cuts are much quicker to finish if you use an electric knife.

    • The electric knife is easy to direct, making it the right choice if you want to shape ROCKWOOL according to your needs.
    • Do not use this knife to cut food if it has not been cleaned.

    • Question 4 of 8: Does the cutting tool have to be adapted to the ROCKWOOL type?

  • Cut Rockwool Step 4
    Cut Rockwool Step 4

    Step 1. All ROCKWOOL products can be cut with the same tool

    There are several types of ROCKWOOL, such as the SAFE'n'SOUND, COMFORTBATT, and COMFORTBOARD brands, but they can all be cut with the same tool. So you don't need to buy another tool.

    Question 5 of 8: How do I keep the ROCKWOOL from shifting when it is cut?

  • Cut Rockwool Step 5
    Cut Rockwool Step 5

    Step 1. Press the ROCKWOOL into the floor with one hand (non-dominant) and use the other hand to cut

    You don't need to hold the ROCKWOOL with special tools so it doesn't slide around when you cut it. Just lay it on the floor, press it with one hand, then hold the knife with the other. If the ROCKWOOL shifts, press harder against the floor.

    • If you want to cut ROCKWOOL on the floor, place a wooden plank as a base to protect the floor, then cut the ROCKWOOL on the plank.
    • Make sure the floor and boards are dry before you place the ROCKWOOL. If the ROCKWOOL gets wet, that's fine, but make sure it's completely dry before using it as insulation.

    • Question 6 of 8: Do I need to wear personal protective equipment?

  • Cut Rockwool Step 6
    Cut Rockwool Step 6

    Step 1. Put on swimming or lab goggles, gloves, long sleeves, long pants, and a face mask

    ROCKWOOL is made of very finely ground stones, then spun into fibers. This material can cause skin irritation or get into the eyes, nose and mouth. Before cutting ROCKWOOL, wear long pants, long sleeves, and personal protective equipment (gloves, swimming or lab goggles, and a mask) so you don't inhale dust.

    • The manufacturer of ROCKWOOL recommends wearing a face mask of at least the N95 type so that dust does not enter the lungs because ordinary face masks are not effective at holding ROCKWOOL dust.
    • If possible, open the window before cutting the ROCKWOOL to prevent dust from accumulating in the room.

    Question 7 of 8: Do I need to measure before cutting ROCKWOOL?

  • Cut Rockwool Step 7
    Cut Rockwool Step 7

    Step 1. Yes

    You will need to measure the area to be coated with ROCKWOOL using a measuring tape. Record the number, then add 2 cm when measuring the ROCKWOOL so that the insulation layer is dense enough. Cut the ROCKWOOL according to the size.

    For example, if you want to cut a 60 cm long ROCKWOOL to cover a 45 cm high board, cut a 13 cm ROCKWOOL to 47 cm

    Question 8 of 8: Can ROCKWOOL be cut lengthwise?

  • Cut Rockwool Step 8
    Cut Rockwool Step 8

    Step 1. Yes, you can

    ROCKWOOL can be cut lengthwise and wide. Regardless of the shape and position of the plane you want to ROCKWOOL coated, the method of cutting is the same.

    Usually, ROCKWOOL is cut lengthwise to cover the area between the rafters or ceiling battens. Then, you need to cut the ROCKWOOL wide and lengthwise to prepare the next piece to be attached to another plane

    Tips

    • If you want to make excellent insulation, add 3-4 cm on each side of the ROCKWOOL piece to seal the entire area.
    • There is a product commonly called rockwool for growing plants without soil. This product is not a ROCKWOOL for insulation. Usually, rockwool which functions as a planting medium is sold in the form of slabs or cubes so that it does not need to be cut before use.

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