Before revision: Advantages Resist wind driven rain Insulation provided by slow moving air films and airgap Enables use of low cost nonrigid insulation batts Tie types A tie in a cavity wall is a used to secure the internal and external walls (or leaves)—constructed of bricks or cement blocks.
After revision: Advantages Resist wind driven rain Insulation provided by slow moving air films and airgap Enables use of insulation in the cavity if the cavity is designed for it Tie types A tie in a cavity wall is a used to secure the internal and external walls (or leaves)—constructed of bricks or cement blocks.