Exterior wall and window laboratory
Compare rain control, air control, insulation, conductive framing, glazing and interior surface conditions.
Reveal insulation gaps, conductive bridges, solar gains and surfaces likely to cross the dew point.
Glazing surface
Room-side condensation and between-pane fogging occur in different locations.
Open connected dossier →Same building. Different hidden stories.
Watch the pathway unfold
Each simulation separates trigger, transport route, visible symptom and verification.
A cold corner crosses the dew point
A conductive junction and limited air movement create a colder interior surface where moisture can condense.
Saturated masonry freezes and spalls
Water-filled pores expand during freezing and progressively detach the surface.
A wall cavity air loop cools one interior strip
Air movement within or through a wall bypasses insulation and creates localized cold surfaces.
Insulated glazing seal failure
Moisture enters the sealed cavity between panes and creates haze that cannot be wiped from room or exterior surfaces.
Seasonal framing movement reopens a drywall joint
Wood moisture and temperature cycles move framing enough to crack a weak finish joint without foundation failure.
Winter window condensation cycle
Indoor moisture meets cold glass, collects at edges and can wet seals, frames and nearby finishes.
See what the layer does to the material
Materials record exposure differently. Their response can reveal a pathway without proving the source.
Steel at a cold condensation point
High conductivity creates cold surfaces that collect moisture and initiate corrosion.
linear condensation, rust and staining below → ▧ConcreteConcrete in repeated freeze-thaw cycles
Saturated pores and weak surfaces can scale when water freezes repeatedly.
scaling, pop-outs and exposed aggregate → ▧SealantExterior sealant after UV aging
Loss of elasticity and adhesion opens edge gaps that admit wind-driven water.
surface cracking, edge separation and hardened beads → ▧GlassGlass below the indoor dew point
A transparent nonporous surface makes condensation visible before nearby porous materials show damage.
droplets, edge runs and repeated sill wetting → ▧Gypsum BoardGypsum board at a cold condensing surface
Intermittent surface moisture can support spotting and finish failure before the core is visibly damaged.
edge spotting, peeling and recurring marks → ▧InsulationInsulation compressed around services
Reduced thickness and gaps create localized heat-flow paths.
cold spots aligned with wiring, pipes or framing → ▧Mineral WoolMineral wool around a cold duct
The fibers do not feed decay but can hold water against metal and adjacent materials.
wet facings, corrosion and reduced thermal performance → ▧Painted SurfacePaint under repeated heat and age
Differential expansion and embrittlement create a network of cracks.
alligator cracking and exposed substrate →The diagram suggests routes.
The real trigger decides.
Describe what changed, where it happened and what weather or operating cycle came first.
