As discussed in Section 1.1, masonr

As discussed in Section 1.1, masonry walls are of two types: structural
walls and rainscreen veneer walls. Single wythe concrete block or
clay brick walls are the most common structural masonry walls: four
such single wythe wall systems are discussed below. Each type offers
different performance potential in terms of climatic factors, fire, thermal,
sound and seismic resistance; and construction and maintenance costs.
Furthermore, each wall system will have inherent aesthetic
characteristics. Additional treatments or finishes may be added to each
of these wall systems to develop them further.
Although masonry units do not have high thermal resistance, their high
mass provides a beneficial moderating influence on interior
temperatures. This "Mass Effect" provides better dynamic thermal
performance than a lightweight wall of the same R-value, and can
reduce heating and cooling loads – see Section 2.6.3 for further
information.