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How Do You Apply Weather Seal to a Door?

Published in Door Weatherproofing 4 mins read

Applying weather seal, also known as weatherstripping, to a door is a practical way to improve energy efficiency and comfort by blocking drafts and preventing air leaks. The process typically involves preparing the door frame, cutting the seal, and adhering or attaching it properly.

Here is a step-by-step guide on how to apply weather seal to a door, based on standard installation practices and incorporating the key steps provided in the reference:

Applying Weatherstripping to Your Door

Ensuring a proper seal around your door is crucial for keeping heated or cooled air inside and preventing moisture, dust, and insects from entering. Follow these steps for effective weatherstripping installation:

  1. Step 1: Measure the door. How much weatherstripping do you need?

    • Before purchasing or cutting, measure the lengths of the sides and top of your door frame where the weatherstripping will be applied.
    • Also, consider measuring the bottom of the door for a sweep.
    • Purchase enough weatherstripping material to cover all necessary lengths, adding a little extra for mistakes or future adjustments.
  2. Step 2: Cut the weatherstripping to size.

    • Using sharp scissors or a utility knife, carefully cut the weatherstripping according to the measurements taken in Step 1.
    • It's often best to cut pieces one section at a time (top, left side, right side) for accuracy.
  3. Step 3: Apply the weatherstripping to the door.

    • The application method depends on the type of weatherstripping you are using.
    • Self-adhesive types: Peel off the backing and press the strip firmly onto the clean, dry door frame, typically on the stop where the door closes against.
    • Compression or bulb types (often vinyl or rubber): These are usually nailed or screwed into the door frame. Align the strip so the bulb compresses slightly when the door is closed.
    • V-strip (tension seal): This thin metal or plastic strip is pressed or tacked into the corner of the door frame.
  4. Step 4: Test the door.

    • Once the weatherstripping is applied, close the door slowly.
    • Check that the door closes completely and latches properly.
    • Listen for drafts or visually inspect for gaps around the edges. You can use a thin piece of paper or a dollar bill: if you can easily pull it out when the door is closed against the seal, the seal might not be tight enough in that spot.
  5. Step 5: Adjust as needed.

    • If the door doesn't close smoothly or if there are still noticeable gaps, make adjustments.
    • For adhesive types, you might need to reposition or add another layer in problem areas.
    • For nailed/screwed types, you may need to loosen fasteners, reposition the strip, and refasten it.
  6. Step 6: Install a door sweep.

    • Weatherstripping seals the top and sides, but a door sweep is essential for sealing the gap at the bottom of the door.
    • Measure the width of the door bottom.
    • Cut the door sweep to size (if needed).
    • Position the sweep on the interior bottom face of the door so that its sealing fin or brush makes firm contact with the threshold when the door is closed.
    • Attach the sweep using the screws provided, ensuring it does not interfere with the door's operation.

Choosing the Right Weather Seal

Selecting the appropriate weatherstripping material is key to success. Common types include:

Type Material Application Durability
Foam Tape Open or closed-cell foam Self-adhesive Low
V-Strip Metal, Vinyl, Plastic Adhesive/Tack Medium
Tubular/Bulb Vinyl, Rubber, Silicone Adhesive/Nail High
Felt Wool or Synthetic Fibers Tack/Staple Low
Door Sweep Aluminum/Vinyl, Brush, Rubber Screw-on Medium/High

Consider the gap size, appearance, and expected foot traffic when choosing.

Properly applied weather seal significantly improves your home's energy efficiency and overall comfort.

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