How to Cut Styrofoam
Score the Styrofoam to create a clean break line., Use a waxed serrated kitchen knife to cut Styrofoam., Cut polystyrene foam with an electric kitchen knife., Use a craft knife to cut Styrofoam., Use a hand saw to cut Styrofoam., Cut Styrofoam with...
Step-by-Step Guide
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Step 1: Score the Styrofoam to create a clean break line.
Use a sharp, thin object to penetrate the foam in order to create a straight cutting line.
Using even pressure, make a groove in the Styrofoam with a credit card, key, butter knife or any other sharp, thin object.
Break the Styrofoam along the scored cutting line.
For best results, situate the foam on a table or counter top with the scored line along the edge of the surface.
Press down gently along the scored line to create a clean break.
If necessary, remove any excess foam with a serrated kitchen knife or craft knife. -
Step 2: Use a waxed serrated kitchen knife to cut Styrofoam.
Wax the knife by running the entire knife blade several times over a candle.
To avoid getting colored candle wax on your foam, use a white candle.
Cut the polystyrene foam with the serrated knife using long, sawing motions.
Keep steady, even pressure on the knife throughout the sawing motions to reduce the chances of breaking or crushing the Styrofoam. , Use an electric kitchen knife, such as a carving knife or a fish fillet knife, to create clean cuts in Styrofoam.
Place the electric knife on the foam along the desired cutting line.
Do not exert pressure on the electric knife, but allow the serrated blades to gently cut through the Styrofoam. , A craft knife is ideal for cutting small, thin pieces of foam, but is not recommended for pieces with a thickness of more than 1 inch (2.54 cm).
Unlike serrated blades that tear through foam, the sharp blades in craft knives tend to flatten or compress the Styrofoam.
This could result in malformed or uneven cuts in thick pieces of foam.
Use a craft knife for small, precise cuts.
Craft knives also can be used to create bevel cuts and v-cuts in foam.
Cut into the Styrofoam with the craft knife using small, steady movements.
Create a shallow cut mark in the foam.
After the initial cut, run the craft knife through the foam several times, creating deeper cuts each time until the Styrofoam is completely cut through from top to bottom.
Change the blades in craft knives frequently when cutting Styrofoam.
Dull blades will create rough, uneven slices in the foam. , Compass saws, coping saws and hacksaws create straight cuts in polystyrene foam.
Avoid using a saw with a flexible blade because the blade can easily wobble in the soft foam, which may result in uneven cuts.
Cut the Styrofoam using long, sawing motions.
Keep even pressure on the saw to reduce the chances of crushing the Styrofoam. , Jigsaws, band saws and scroll saws, which are traditionally used for cutting wood, can be used to create clean cuts in Styrofoam.
Power saws are particularly effective in cutting large, bulky pieces of foam.
Follow the directions for the particular type of saw you are using.
When using power saws to cut Styrofoam, always wear safety goggles. , Hot wire cutters, which are available at home improvement or craft stores, melt through the foam with a heated wire, creating a smooth edge.
Hot wire cutters are especially effective for creating shapes out of Styrofoam.
Apply consistent pressure with the hot wire cutter along the desired cutting line.
Use extreme caution when operating a hot wire cutter because the wires are extremely hot and can cause severe burns. -
Step 3: Cut polystyrene foam with an electric kitchen knife.
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Step 4: Use a craft knife to cut Styrofoam.
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Step 5: Use a hand saw to cut Styrofoam.
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Step 6: Cut Styrofoam with power saws.
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Step 7: Utilize a hot wire cutter.
Detailed Guide
Use a sharp, thin object to penetrate the foam in order to create a straight cutting line.
Using even pressure, make a groove in the Styrofoam with a credit card, key, butter knife or any other sharp, thin object.
Break the Styrofoam along the scored cutting line.
For best results, situate the foam on a table or counter top with the scored line along the edge of the surface.
Press down gently along the scored line to create a clean break.
If necessary, remove any excess foam with a serrated kitchen knife or craft knife.
Wax the knife by running the entire knife blade several times over a candle.
To avoid getting colored candle wax on your foam, use a white candle.
Cut the polystyrene foam with the serrated knife using long, sawing motions.
Keep steady, even pressure on the knife throughout the sawing motions to reduce the chances of breaking or crushing the Styrofoam. , Use an electric kitchen knife, such as a carving knife or a fish fillet knife, to create clean cuts in Styrofoam.
Place the electric knife on the foam along the desired cutting line.
Do not exert pressure on the electric knife, but allow the serrated blades to gently cut through the Styrofoam. , A craft knife is ideal for cutting small, thin pieces of foam, but is not recommended for pieces with a thickness of more than 1 inch (2.54 cm).
Unlike serrated blades that tear through foam, the sharp blades in craft knives tend to flatten or compress the Styrofoam.
This could result in malformed or uneven cuts in thick pieces of foam.
Use a craft knife for small, precise cuts.
Craft knives also can be used to create bevel cuts and v-cuts in foam.
Cut into the Styrofoam with the craft knife using small, steady movements.
Create a shallow cut mark in the foam.
After the initial cut, run the craft knife through the foam several times, creating deeper cuts each time until the Styrofoam is completely cut through from top to bottom.
Change the blades in craft knives frequently when cutting Styrofoam.
Dull blades will create rough, uneven slices in the foam. , Compass saws, coping saws and hacksaws create straight cuts in polystyrene foam.
Avoid using a saw with a flexible blade because the blade can easily wobble in the soft foam, which may result in uneven cuts.
Cut the Styrofoam using long, sawing motions.
Keep even pressure on the saw to reduce the chances of crushing the Styrofoam. , Jigsaws, band saws and scroll saws, which are traditionally used for cutting wood, can be used to create clean cuts in Styrofoam.
Power saws are particularly effective in cutting large, bulky pieces of foam.
Follow the directions for the particular type of saw you are using.
When using power saws to cut Styrofoam, always wear safety goggles. , Hot wire cutters, which are available at home improvement or craft stores, melt through the foam with a heated wire, creating a smooth edge.
Hot wire cutters are especially effective for creating shapes out of Styrofoam.
Apply consistent pressure with the hot wire cutter along the desired cutting line.
Use extreme caution when operating a hot wire cutter because the wires are extremely hot and can cause severe burns.
About the Author
Christina Harris
Experienced content creator specializing in hobbies guides and tutorials.
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