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It’s raining (inside)

16 April 2026

If you own a steel clad building like a garden workshop, grain stores or livestock housing there’s a good chance you’ve experienced interior rain. It’s not a leak, it’s just condensation. A bit like if you forget to leave the bathroom window open after a shower and the ceiling gets dripping wet.

When the temperature outside drops, your steel roof sheets become cold. When warm, moist air hits that cold metal, it reaches the “dew point” and turns into condensation. This is particularly common in areas with high humidity, like livestock areas. Without any sort of water management system, these droplets pool together and eventually rain down on your equipment, vehicles, livestock or food storage.

In an agricultural setting, constant moisture can lead to damp bedding, spoiled grain and respiratory issues in your livestock. In a garage it could mean:

  • Corrosion of fixings and tools.
  • Mould growth as damp environments are breeding grounds for spores that damage health.
  • Electrical hazards as water dripping into sockets or machinery is a significant safety risk.

Traditional fixes like DIY stick-on foams just peel away over time, so you’re back at square one with a messy looking, failing, damp roof.

Dripstop™ Anti-Con is the solution

We solve this problem at the point of manufacture, by integrating Dripstop™ Anti-Con directly onto our box profile and corrugated steel sheets.

It’s not just stuck on. As we fabricate your sheets, we bond the fleece membrane to the reverse of the sheet. The creates a permanent, structural bond that won’t delaminate.

Why it works

  • Superior Absorption: The fleece acts like a sponge, trapping moisture in its microscopic pockets before it can form a droplet.
  • Controlled Evaporation: Once the outside temperature rises, the trapped moisture evaporates naturally back into the air.
  • Clear Laps: When we roll your sheets, we leave the overlap edge free of Anti-Con. This prevents “wicking”, where water is sucked into the joints of your roof through capillary action.

Is it right for your project?

While Anti-Con is highly effective, it requires air flow to work. The fleece needs to dry out between cycles, so your building needs adequate ventilation. We generally recommend:

  • Open Ridges & Eaves: Avoid foam fillers where possible to encourage airflow.
  • Minimum 10° Pitch: This ensures any extreme moisture migration follow the profile of the roof.