How to seal a gap between a door and a frame | hometown (2023)

Nothing is worse than losing valuable ambient heat in winter and cool air in summer through gaps between the door and the frame. Fortunately, this problem has a relatively simple do-it-yourself solution.

To seal a gap between a door and the frame, you must either repair the hinges if there is a gap problem or replace the worn sealing strip. You must also install or replace a door sweep at the bottom of the door to complete the door seal.

If you're looking for tips on installing new weatherstripping or sealing a gap between your door and frame, you've come to the right place. Read on to find out how to fix these shortcomings once and for all.

(Video) Filling Gaps in a Door Frame

Why are the gaps between the door and the frame bad?

  • heat loss– Next to windows, doors are the biggest cause of heat loss. This leads to a significant increase in the energy consumption of residential buildings. Between your windows and doors, they account for 20 to 30 percent of a home's heat loss.
  • cooling loss– Not only do rooms let hot air escape, they lose cold air in the summer and increase your bills.
  • water damage– Exterior door openings can let in rain and moisture, which can damage the interior of your home.
  • entrance to the plagues– Door openings are also a gateway for pests. A sturdy aluminum sill and door broom can help keep unwanted little intruders out.

What should be the difference?

There must be some space between the door and the frame for the door to open and close properly. The distance between the sides and the top must be equal to the nickel width (2mm) and 8mm between the door and the floor.

While a larger space around the door and frame may not seem like an emergency, it should be seen as a daunting task. No one should have to pay unnecessary heating or cooling costs if they don't need it.

(Video) How to Fill a Gap between Door Frame and Wall

Why is there a gap between the door and the frame?

Before removing or replacing weatherstripping, make sure gaps are due to worn weatherstripping and notbroken hinges. To check for loose hinges, grasp the door by the handle and lift it up. If the door moves upwards, it is a hinge issue causing the gaps and a hinge repair will fix your issues.

  • Gaps can sometimes be caused by loose or missing screws. Open the door and make sure the screws are in place and tight.
  • If the screws are loose and cannot be aligned properly, you can use threadlockers to secure them.
  • Make sure all hinges are the same size and don't mix a heavy hinge with standard weight hinges.

Door weather seals can often bend, compress, or wear out over time, leaving a gap for internal temperature to escape. Caulking is the soft, flexible material applied to the sill and lintel to keep out wind and water and maintain the internal temperature.

Signs you need a new gasket

  • The light shines around your closed door. If you can see light through and see gaps around your outer door, that's a good sign you need to replace your weatherstripping. Even the smallest of spaces lose heat in the winter and cool off in the summer, so installing new weather strips can save money and comfort.
  • There are water leaks around the door frame.If you notice water around your door jamb or frame when it rains, your masking tape is no longer working. Water leaking through cracks can cause mold or rot and affect the door and interior of your home. Keep in mind that once moisture and rot sets in, it can get expensive.
  • Your sealing profile is bent, torn or dented.As your weather strip ages, it dries out and warps, no longer functioning as a seal to outside air. For caulking to work, it must provide even compression around the door that forms a proper seal. This seal protects your home from water damage and reduces energy use for air conditioning and space heating.

How to Seal a Gap Between a Door and a Frame

A properly sealed door requires two main components. A sealing strip covering the top and sides of the door and a sealing strip covering the bottom of the door. Keep in mind that even a deceptively small gap around the door can increase heat or AC leakage to the outside.

1. Install new sealing strips

Choose the gasket that best fits the area where the door will be located. The sealing strip you choose should seal well when the door is closed, but allow for free opening.

(Video) Sagging front door hitting top of frame

types of weather protection

  • Felt and open cell foams.These are much cheaper but are not very weather resistant. They're a little visible and aren't the best at blocking airflow due to their porous nature. However, they are easy to apply and may be suitable for the low-traffic area of ​​your home.
  • Vinyl weather protection.That's a little more expensive. However, it is more durable and has high moisture resistance.
  • Felt-based weather protection.It can be smooth or reinforced, but it is quite delicate and needs to be changed annually. They are not useful in high humidity or high traffic environments.
  • Metallic weather protection.It is available in bronze, stainless steel and copper. While more expensive, they are extremely durable and blend best with an older home aesthetic.
  • Rubber and vinyl tubes.This sealing strip is durable and provides a tight seal. This type of stripping can be more difficult to install, but has a service life of more than 5 years. This type of stripping is very durable and does not easily compress when the door swells and shrinks.
  • foam tape.It is made from open or closed cell foam or EPDM rubber and is sold in a variety of widths and thicknesses. It is suitable for irregular gaps. It is easy to use and only needs to be installed and pasted on the inside of the door frame.

Top Rated Weather Tracks for 2020

How to install new caulking

If your door was not previously fitted with caulking, installing new caulking should not be difficult. Make sure your surfaces and grooves are scrupulously clean before installing new sealing tapes.

Installation process:

  1. Cut and nail the weather strip to the door frame.Close the door and measure the top edge of the frame from side to side. Mark this measurement on your time track with a thin, precise line.
  2. Cut off the top of the time strip.Cut the soft part of the caulking with a knife or scissors and cut the panel with a fine-tooth saw or hacksaw.
  3. Nail the top of the time bar.Place the weather strip with the soft side against the door along its entire length. Drive 1-1/2 inch nails into the flange, driving them in lightly without driving in the nails. Then measure the side door frames.
  4. Cut your side pieces.Using a scrap piece as a guide, trim each end of the side strip to match the shape of the top piece. Cut the foam with scissors and the flange with a fine-tooth saw.
  5. Customize your cut.File or grind the cut edge to make it as tight as possible. Measure and cut the floor to length and position the strips so that the entire joint is flush against the door and staple in place.
  6. Check fit.Make sure the sealing strip is level without interfering with the movement of the door and it will lock. Once the fit is right, you can drive in the nails. Be sure to place your nails about 2 inches from the tips and about 12 inches apart to avoid splitting. Make sure your seams are even before driving in the nails.

2. Install a door broom

Door caulks fit between the bottom of the door and the floor and are flat pieces of plastic, aluminum, and stainless steel with a strip of vinyl, nylon, or a brush. The brush perfectly closes the gaps without interfering with the movement of the door.

How to install a door broom:

(Video) Fix OVERCUT Door Frame GAP at Base of Door Jamb/Casing with WOOD FILLER

  1. Measure the bottom of your door.Remove the old broom and thoroughly clean the area. Measure the width of the bottom of the door from the inside and mark the length on the overhang.
  2. Cut your scan to the right size.Using your measurements, cut the foam with scissors or a pocket knife and cut the flange with a fine-tooth saw.
  3. Mark your placement points.Position the sweeper so that the soft part lightly touches the top of the door sill. Mark the screw locations and drill with a 3/32″ bit.
  4. Attach the scan.Screw the broom against the sill and open and close the door to verify the broom is in the correct position.
  5. Attach felt pads to the bottom edge of the door.Cut two 1-¾ (4.44 cm) blocks of ⅛-inch-thick felt. Nail the pads to the bottom of each side of the frame. Open and close the door to secure the seat. Felt size can be adjusted to fit your specific frame or overlapped to increase thickness.


These simple steps will not only make your home more comfortable in warm or winter weather, but also save and save energy.reduces noise. While small violations may seem harmless, they can be costly in the long run. As we've shown, you don't need to hire an expert and pay for their time when you can get the same results yourself for the price of parts.

We've included this video clip showing how to deal with old doors with some structural damage that still need to be sealed, in case you want to see how it's done:


How do you fill gaps between doors and frames? ›

One of the easiest ways to fill door gaps is to use weatherstripping. You can use sticky foam tape; tubular silicone, vinyl or rubber; corner pads; felt rolls or one of the weatherstripping kits sold in stores. If old weatherstripping is already on the door, take it off and clean the frame with rubbing alcohol.

What is the gap between door and frame called? ›

Margins (sometimes also called “rebates”) are the spaces between the door and the door frame. These are often important if you're looking at issues with your hinge jamb. Again, these spaces can be broken down into specific types: the hinge margin, strike margin, top (header) margin, and bottom (sweep) margin.

Does door seal go on the inside or outside? ›

For a door that swings inward, install the brush seal on the inside bottom edge. If the door swings outward, attach it to the outside bottom edge of the door.

How do you set a gap in a door? ›

If the gap on the hinge side is too tight, simply unscrew the hinges and put some thin cardboard behind to pack them out and make the hinge side gap larger. This will in turn move the handle side of the door closer to the frame.

What is a door frame guard? ›

Protect door frames from damage by carts, beds, luggage and wheelchairs. Door frame guards can be custom formed to ensure a perfect fit and lasting frame protection.

Should there be a gap between door frame and wall? ›


A well fitted door should have a 2mm gap on either side and at the top. The gap at the bottom will depend on the thickness of your flooring/carpet.

How do you fill gaps between wood and walls? ›

If it's stain-grade, you can use a wood filler like they use for wood flooring. If it's paint-grade, you can use a fast set wall mud. It comes in 5 minute, 20 minute, 40 minute, and 90 minute. It dries hard and strong.

How do you install a butted door casing? ›

When installing butted casing, there's no need to cut angles into the pieces. Simply position the head casing so it's level with the reveal line on the top of the door frame, then secure with nails.


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