Airtight seals against water, air, wind, vapour and noise

Gaps which open up as a result of a discontinuity in a roof and/or an unsealed wall can give rise to the following problems:
• Ingress of heat in the summer
• Loss of heat in winter due to natural convection of warm air and
the ingress of cold air from the outside
• Condensation in the outer layers in winter, where warm air coming
from inside the building cools down and may condense
• Condensation in the inner layers in winter, where
humid air outside cools down and may condense
• Reduction in internal room comfort due to drafts
• Noise

The ideal solutions to avoid all those problems are: