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The solar reflective paint applied to this upstand has shrunk as it has aged, resulting in severe surface cracking of the asphalt. In turn the cracked areas absorb more radiation, exacerbating the problem. |
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Asphalt hardens following exposure to UV light, rendering it less flexible. At points where movement occurs it gradually becomes less capable of responding and cracking increasingly develops. |
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Asphalt skirting has been taken across a parapet movement joint without provision for movement; it has cracked as a result. |
