70's weatherside / pinex- would dark paint in hot sun cause cracking?

last month
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I want to paint the exterior of my house, it is in good condition but i want it a dark colour. But friends warned me that their wooden boards split in months with dark paint. Does 70-s 'weetbix' weatherside do the same? am i safe to paint dark. I am in nelson and the sun can get very host any chance of it is a no no. Thanks