WHY CAN A STEEL EXTERIOR DOOR BOW IN STRONG SUN?

Why Is the Door Harder to Close Only in the Afternoon?

Direct sun can heat the exterior surface of a door while the inside face remains much cooler.

That temperature difference can create temporary thermal movement.

On some doors, this may appear as:

  • Slight bowing
  • Changed weatherstrip contact
  • Temporary latch difficulty

Why Does Colour Matter?

Dark finishes generally absorb more solar energy than light finishes.

A dark south- or west-facing door may therefore experience stronger surface heating.

Is Every Bow a Product Failure?

No.

The contractor should determine whether the problem comes from:

  • Thermal movement
  • Frame installation
  • Hinge adjustment
  • Structural movement
  • Permanent panel damage

Why Not Immediately Adjust the Frame?

If the condition appears only during peak sun and disappears later, aggressive adjustment may create a different problem when the door cools.

Product Requirements Matter

Door manufacturers may have specific recommendations about:

  • Paint colour
  • Storm doors
  • Solar exposure
  • Warranty limitations

Diagnose When the Door Moves Before Deciding Why It Moves.

Envirotech Exteriors can assess the entire entry system when a door operates differently under changing weather conditions.

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