Noozer wrote:
House is about seven years old. It's a light brown colour (hickory is the
name). It has vinyls siding and I've noticed that it looks "chaulky"... Like
the oils in the plastic are drying out.

I haven't looked really close to it yet, but I'm wondering what might be
happening.

Located in Calgary, AB, Canada.

UV and other weathering, probably. May be able to wash it and restore
some color, may not depending on the particular vinyl...

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