How to Use Exterior Spackling

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You can use spackling, or spackle, on the exterior of your home if it consists of a material into which the spackle can seamlessly integrate. Stucco is one such exterior building style. If you have holes or cracks in a stucco home or building, spackle can fill in the spaces in the exterior wall. By using exterior spackling, as opposed to indoor spackling, you can ensure that the spackle won't shrink and leave gaps around your repair job.

Things You'll Need

  • Soft brush or canned air
  • Safety goggles
  • Canvas tape
  • Utility knife
  • Plywood or drywall
  • Spackle
  • Putty knife
  • Spackle the exterior of your home or building on a dry day with no rain in the forecast. Choose a cloudy day if possible to prevent the spackling from setting up too quickly as you apply it.

  • Run a soft brush over the hole or the crack that you want to spackle to break off any loose pieces of the wall and brush the debris from the hole or crack you plan to fill. If you prefer, you can also blow into the hole with canned air, but make sure you wear goggles to protect your eyes.

  • Cover any hole or crack that is smaller than 6 inches in size with tape. Choose canvas duct tape, as recommended by general contractor Gary Abrams. Apply the first pieces of tape by sliding them into the hole or crack with the adhesive side facing toward you and pressing them into place on the underside of the wall with your fingers. You will not be able to apply the final piece in this manner, because you have no way to remove your hand from the hole. Apply the last piece of tape onto the hole directly over the tape you've already applied.

  • Cut around a hole or crack larger than 6 inches in size with a utility knife to make a square or rectangular-shaped opening. Cut a piece of scrap plywood or drywall down to the same size as the opening.

  • Place tape across the backside of the opening just as you did with the smaller hole or crack. Press the plywood or drywall into the space gently but with enough pressure to make the patch stick to the tape.

  • Use a putty knife to spread exterior spackling to the tape or the patch that you added to the hole. Fill the hole completely until the spackle sits even with the surface of the wall. Let the spackle dry for at least 24 hours before touching it.

References

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