Understanding U/V light
Discover the often-overlooked impact of ultraviolet light on buildings. Learn why this natural phenomenon is crucial to consider for long-term preservation, especially for paintwork, and how We can help you to navigate these challenges.
What is U/V light and its impact on old buildings?
Ultraviolet (U/V) light is a form of electromagnetic radiation, invisible to the human eye, that is present in sunlight. For old buildings, U/V light plays a significant, often detrimental, role in their degradation. Its energy can cause chemical bonds at a molecular level in materials to break down, leading to fading, embrittlement, and overall deterioration. Understanding this phenomenon is vital for homeowners, trades, and specifiers involved in the care and conservation of these historical assets, ensuring appropriate protective measures are put in place.
The damaging effects of U/V light on paints
One of the most noticeable impacts of U/V light on old buildings is the damage it inflicts upon paintwork. U/V radiation breaks down the organic binders and pigments in paint, leading to a process known as photo-degradation. This results in discolouration, chalking, cracking, and ultimately, peeling of the paint layers. Over time, this damage compromises not only the aesthetic integrity but also the protective qualities of the paint, leaving the underlying building materials vulnerable to further decay. Recognising how U/V light damages paint is key to selecting appropriate, historically sympathetic, and U/V-resistant finishes.
Never assume
When dealing with period and listed buildings, it is critical to "never assume" that existing materials or past practices are inherently resistant to U/V damage. Modern understanding of material science, coupled with traditional knowledge, offers effective solutions for preservation. Always investigate the specific needs of your building and consult with experts to choose the most suitable protective coatings and conservation strategies. For guidance on U/V protection, compatible paints, or any other conservation challenge, do further research.