Some carpet install tips...
Using a heat gun 12-18 inches away you can get the carpet hot enough without distortion, then simply press it in place to form the plastic backing. When your hands start to feel uncomfortably hot is about the right time to start forming.
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When encountered a very large gathering or pucker of material you may have to use some other techniques.
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Heat the carpet and then lay a heavy weight against the gathering, work up outward on the carpet 1-2 inches at a time.
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The top edge it was a bit more stubborn to move. Pull back the carpet and heated the plastic backing directly to make it move easier.
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