Condensation and Mould Issues: Causes, Fixes and Prevention

Condensation and mould are common headaches for homeowners and left unchecked, can damage your home and pose health risks. However, some knowledge and action can resolve or prevent most issues. Here's how to tackle the top condensation and mould issues and, most importantly, how to prevent them from recurring.

Excess Condensation on Windows

The Problem: Water droplets form on windows, especially during colder months, often due to poor ventilation and temperature differences.

How to Fix It:

  • Wipe away condensation daily using a cloth or squeegee to prevent water pooling.
  •  Consider applying anticondensation window film for an added layer of protection.

Prevent it from Coming Back:

  • Ventilate your home: Open windows or use trickle vents, especially during activities like cooking or showering.
  • Maintain a consistent indoor temperature to reduce drastic temperature differences.
  • Use a dehumidifier to reduce moisture levels.

Mould Growth on Bathroom Walls

The Problem:  Warm, damp conditions in bathrooms create the perfect environment for mould to thrive.

How to Fix It:

  • Scrub mouldy areas with a mixture of water and white vinegar or a store-bought mould remover.
  • Repaint walls with mould-resistant paint to discourage regrowth.

Prevent it from Coming Back:

  •  Always use an extractor fan or open a window during or after showering.
  •  Wipe down walls and tiles after use to remove excess moisture.
  •  Check for and then repair leaks from showers, sinks, or pipes.

Black Mould on Walls or Ceilings

The Problem: Black mould often appears in corners or on cold walls due to poor insulation and excess moisture.

How to Fix It:

  • Remove the mould using a specialised cleaning solution or a vinegar and water mixture.
  • Treat the affected areas with an antifungal spray to kill spores.

Prevent it from Coming Back:

  • Improve insulation in problem areas to reduce cold spots where condensation forms.
  • Ensure adequate ventilation, especially in rooms prone to high humidity.
  • Avoid drying clothes indoors without proper ventilation or use a tumble dryer.

Condensation in Bedrooms

The Problem: Poor air circulation and overnight breathing can lead to damp walls, windows, and mouldy furniture.

How to Fix It:

  •  Check and clean behind furniture where mould often hides.
  •  Use moisture absorbers or silica gel packs in wardrobes and drawers.

Prevent it from Coming Back:

  •  Position furniture slightly away from walls to allow air circulation.
  •  Ventilate bedrooms daily by opening windows.
  •  Consider investing in a humidity monitor to ensure levels stay below 60%.

Peeling Wallpaper or Paint Due to Dampness

The Problem: Persistent dampness causes wallpaper or paint to bubble, peel, or discolour.

How to Fix It:

  • Remove damaged wallpaper or paint and allow the wall to dry completely. 
  • Apply a damp sealant before repainting or reapplying wallpaper.

Prevent it from Coming Back:

  • Address any underlying causes of damp, such as leaking pipes or rising damp.
  •  Improve ventilation and insulation in the affected area.
  • Use breathable paint or wallpaper to allow walls to "breathe."

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 How to Stop Condensation and Mould Before It Starts

  1. Control Moisture Levels: Keep indoor humidity between 40-60% by using dehumidifiers and avoiding overwatering houseplants.
  2. Ventilation is Key: Open windows, use extractor fans and don’t block air vents.
  3. Address Leaks Immediately: Fix leaky pipes, roofs, and gutters to prevent hidden damp spots.
  4. Insulate Your Home: Proper insulation helps maintain consistent indoor temperatures, reducing condensation.
  5. Maintain Regular Cleaning: Clean and inspect high-risk areas frequently to catch early signs of mould.

 

If you have any questions, would like further advice or to see how we can help you resolve your ventilation issues, please either give our UK-based experts a call on 01892 600121, email mvhr@epicair.co.uk or check out our website to see the range of products we have to offer.