How to Install Insulation Under Vinyl Siding

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Vinyl siding is a great solution for updating the look and feel of your home. One nice feature is that it can be installed over different types of existing siding. To create a consistent surface for the vinyl siding, it's a good idea to first affix sheets of rigid foam insulation to the exterior of the house. Then the channels and panels that make up vinyl siding can be installed onto the foam insulation. The rigid insulation will also increase your home's overall energy efficiency.

Things You'll Need

  • Tape measure
  • Level
  • Pencil
  • Chalk line
  • Foam insulation
  • Corrosion-resistant, plastic cap, ring-shank nails
  • Utility knife
  • Hammer
  • Select your insulation. Consult the siding manufacturer’s recommendations regarding the specific thickness and type of insulation to use under its siding product.

  • Inspect the existing siding or exterior of the house. Vinyl siding allows moisture to pass through. As a result, it's important that pre-existing siding is intact, or that the house is wrapped in a water-resistant membrane. Look for any signs of water damage. Remove any loose nails or pound them flat.

  • Mark your baseline. Use a tape measure and level to find the low point of the house. Then refer to the siding manufacturer’s instructions and measure up the specified distance to where the siding should begin. Mark this point with a pencil. Use your level and a chalk line to mark this baseline around the entire house.

  • Install your rigid foam insulation panels. Nail the sheets of insulation into place using corrosion-resistant, plastic cap, ring-shank nails. Drive the nails every 16 inches along the length and width of the insulation panels.

  • Cut the panels to fit using a utility knife. Make a cut about half as deep as the thickness of the panel, snap it, then run the knife along the inside of the bend to separate the two pieces.

  • Install the panels under every desired portion of the house. You’re now ready to start installing your vinyl siding.

References

  • Photo Credit house siding 3 image by Psycience from Fotolia.com a sharp utility knife image by timur1970 from Fotolia.com
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