Ko te tapahi i te koranu konumohe, ngā rauemi hiato, me ētahi atu rauemi whare pākahiko me karo i ngā rohe nui rawa e pāngia ana e te wera. Ko te pūtake hau iti o Dukas (≤-20℃) ka ārai i te waikura i te wā tapahi, ā, i te whakakotahitanga me te whakahaere pēhanga tika, ka āwhina i ngā kamupene pūngao hou ki te whakapai ake i te ōritetanga me te haumaru o te hua.
Mā te whakauru i te pūwero tīwiri, te whakamaroke pouaka whakamātao, te tātari tika, me te tāke hau ki roto i te reti kotahi, ko te tāutanga ki te papaanga me hono noa i te pūtake hiko me te paipa hau matua, ā, ka oti te tāutanga me te whakatūnga i roto i te 30 meneti. Ki te whakatauritea ki te otinga momo-wehewehe, ka penapenahia te 60% o te wāhi papa, ā, ka whakaitihia ngā wāhi turuturu pea mā te 75%.