How To Make An Exterior Door Sill Pan

An exterior door sill pan is a metal or plastic pan that sits on the threshold of a door and catches water that flows off the door. This prevents the water from seeping underneath the door and causing damage to the framing or flooring. Exterior door sill pans are available at most home improvement stores.

How To Make An Exterior Door Sill Pan

Making an exterior door sill pan is a relatively simple process that can be completed in a few hours with basic tools. The first step is to remove the existing door sill and measure the opening. Then, cut a piece of lumber to fit the opening and attach it to the bottom of the opening with construction adhesive and nails. Next, measure and cut a piece of flashing to fit the opening and attach it to the top of the door sill lumber using roofing nails. Finally, seal all

1. Exterior door sill pan – 1″x4″x8′ lumber – 2″x4″x8′ lumber – Construction adhesive – Caulking gun – Circular saw – Drill – Hammer – Level – Square – Tape measure

  • Cut a piece of metal flashing or sheet metal to size using tin snips
  • Measure the width and length of the door sill
  • If using metal flashing, fold over the top lip so that it forms a crease

-The sill pan should be made from a durable material that can resist weathering and decay, such as concrete, metal, or plastic. -The sill pan should be installed so that it is slightly above the level of the finished floor to allow for proper drainage. -The sill pan should be sealed to the foundation wall and the door frame to prevent moisture infiltration.


Frequently Asked Questions

How Do I Make An Exterior Door Pan?

To make an exterior door pan, you will need to purchase a piece of plywood that is large enough to cover the opening of your door. You will then need to cut the plywood to size and attach it to the door frame using screws or nails.

How Do You Measure A Door Sill Pan?

The door sill pan is the horizontal piece of metal or plastic that the door closes against. It is usually mounted on the floor and can be either a single or double piece. There are a few ways to measure it, but one common method is to measure the height from the floor to the top of the sill and then subtract the thickness of the door.

Can You Use Flashing Tape Instead Of Sill Pan?

Yes, you can use flashing tape instead of sill pan. Flashing tape is a self-adhesive waterproof membrane that is used to seal the joints between roofing materials and trim or siding. It is also an effective way to seal around windows and doors.


In Closing

An exterior door sill pan is a necessary component of a door installation. It is a waterproof membrane that prevents water from entering the structure around the door. It is important to install the sill pan properly to ensure that it functions correctly and lasts for many years.

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