Weather & Insulation

Composite Door Rain Problems

Rain penetration around a composite door - nearly always frame-to-brick sealant, drainage or the head drip cill.

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

Overview

Driving rain, especially Atlantic squalls, will find any weakness in a doorset. Compare where the water shows up to identify the source.

Symptoms

  • Water on floor after heavy rain.
  • Wet plaster next to the frame.
  • Water only in wind-driven rain.

Common causes

  • Failed frame silicone.
  • No head drip cill or cill damaged.
  • Blocked drainage.
  • Threshold worn.

When to call a professional

  • Re-siliconing or cill installation.

Prevention

  • Re-silicone every 5-8 years.

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