• Are windows a common source of water infiltration?
  • What role do sealants play in the building envelope?
  • Does replacing exterior caulking always stop water infiltration?
  • What are flashings?
  • Why are transitions between building systems important?
  • What is an air barrier?
  • What is a vapour barrier or vapour-control layer?
  • What is thermal bridging?
  • Can thermal bridging cause condensation?
  • What causes condensation on interior walls or windows?