Threshold Problems

Water Under Door

Water coming in under a composite door - threshold gasket, drainage or level. Diagnose in 60 seconds.

Written by Cornwall Composite DoorsReviewed by Cornwall Composite Doors installersLast updated July 20262 minute read

Overview

Water under the door means the threshold seal or drainage has failed, or the threshold isn't level. All three are fixable.

Symptoms

  • Puddle on floor after rain.
  • Damp mat.

Common causes

  • Worn threshold gasket.
  • Blocked drainage slots.
  • Threshold not level.

When to call a professional

  • Threshold levelling or replacement.

Prevention

  • Clear drainage monthly.

Helpful pages

Want a quick price?

Free survey, no salesman, no obligation.

Get a free quote
FAQs

Related questions

Get started

Ready for a beautiful new front door?

Free, no-obligation surveys across Cornwall. Written 10-year guarantee on every install.