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How do I clean calcification off my glass?

4th Dec 2024

Calcification on glass, also known as limescale, occurs due to mineral buildup from hard water. This can happen when glass sheets are stored for extended periods. However, once your glasshouse is built and the panes are exposed to airflow without anything pressing against their surfaces, calcification will not occur.  

Why Does It Happen?

  1. Hard Water: Hard water contains high levels of dissolved minerals such as calcium and magnesium. When this water evaporates, it leaves behind mineral deposits on the glass.
  2. Evaporation: As water evaporates from glass surfaces, the minerals in the water are left behind, forming a white, crusty residue.
  3. Environmental Conditions: Factors such as high water temperature, prolonged exposure to hard water, and inadequate ventilation can exacerbate the formation of calcium deposits.

Most importantly, can you clean it off?  The answer is..it depends.  Most of the time it can be cleaned, or at least lessened to a degree it isn't very noticeable.  It will not affect the integrity of the glass, it's just a visual thing.  Here are some cleaning tips:

1. Vinegar Solution

  • Mix equal parts of water and white vinegar in a spray bottle.
  • Spray the solution onto the calcified areas.
  • Let it sit for about 15-20 minutes.
  • Scrub gently with a nylon scrub pad or a soft brush.
  • Rinse with water and wipe dry with a lint-free cloth.

2. Baking Soda Paste

  • Mix baking soda and water to form a paste.
  • Apply the paste to the affected areas.
  • Scrub gently with a nylon scrub pad or a soft brush.
  • Rinse with water and wipe dry.

3. Lemon Juice

  • Apply fresh lemon juice directly to the calcified areas.
  • Let it sit for a few minutes.
  • Scrub gently with a nylon scrub pad or a soft brush.
  • Rinse with water and wipe dry.

The best solution is prevention.  Try to keep your glass free of moisture while it is in storage, and ideally, it is not stored in the crate more than a few weeks before you can get to putting it up so no calcification occurs.