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mLine 26:
Line 26: − Somewhat counter-intuitively, the survival of green roof planting is greater in winters with long deep sub-zero temperatures. Being shallow and very exposed to warming sunlight, green roofs thaw rapidly. Frequent freeze-thaw cycles in the early and late winter is associated higher loss of vegetation on green roofs.+ +
→Other freezing related concerns
Freezing temperatures can cause problems with pipes and cisterns exposed above the frost penetration line[http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/ee1f1756eacc00e18525808200628fbf/$FILE/OPSD3090.101%20Rev%231%20Nov2010.pdf]. This maybe a significant issue for [[Rainwater harvesting|rainwater harvesting systems]], including residential [[Rain Barrels|rain barrels]].
Freezing temperatures can cause problems with pipes and cisterns exposed above the frost penetration line[http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/ee1f1756eacc00e18525808200628fbf/$FILE/OPSD3090.101%20Rev%231%20Nov2010.pdf]. This maybe a significant issue for [[Rainwater harvesting|rainwater harvesting systems]], including residential [[Rain Barrels|rain barrels]].
<h3>Green Roofs</h3>
<h3>Green Roofs</h3>
The survival of [[Green roofs: Planting|green roof planting]] is greater in winters with long deep sub-zero temperatures. Being shallow and very exposed to warming sunlight, green roofs thaw rapidly. Frequent freeze-thaw cycles in the early and late winter are associated higher loss of vegetation on green roofs.
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