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Designing for Moisture Control
A number of practical strategies help architects and builders design effectively
for moisture control. These strategies depend on building materials that possess
the proper moisture management characteristics:
Preventing External Water Intrusion
The most important moisture control strategy is to prevent building assemblies
(walls and floors) from getting wet due to external water sources. In most
climates, the typical external source of water is rainfall. Strategies to
control water intrusion from rainfall blend the right building design with the
proper combination of building materials.
Controlling Internal Moisture Sources
Building assemblies must be prevented from getting wet due to moisture from
internal sources. The building's construction and selection of building
materials should allow building assemblies to breathe. Built-up moisture can
then be eliminated before causing any damage.
Allowing Building Assemblies to Dry Out
Intelligent design assumes that the building assemblies will get wet, so they
need to be able to dry out before damage occurs. This requires a design —
implemented with the appropriate building materials — that provides the
opportunity for building assemblies to do this.
Effective moisture control requires that individual building materials operate
together as a complete system. This is one of the most important factors in the
successful long-term performance of building assemblies.
Our Approach to Moisture Control Systems
The Fortifiber Building Systems Group designs building materials to operate as
integral parts in a complete Moisture Control System. This systems orientation
is reflected in the many things we do, including:
- Ongoing work with building scientists to develop new materials that
offer increased protection from water intrusion and moisture.
- Rigorous laboratory and field testing, which ensure complete
compatibility between our various elements in our Moisture Control Systems —
Weather-Resistive Barrier product line, flashing products and underslab
- The development of unique products that increase the effectiveness of
our Moisture Control Systems, such as Moistop Tape®, Moistop® Sealant and
This approach results in building materials that prove to be incredibly
effective in protecting walls and flooring systems against water intrusion and
moisture. It is one of the reasons we point to more than sixty years of proven
performance in the field, and why our customers have continued to specify the
use of our products — year after year — in over five million homes and
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