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House of RAMERK · Engineering Notes

REN-001MoistureBehaviour

Subject Moisture Movement in Building Structures
Intended use Observation · Prevention · Documentation
Status Living Engineering Note
Edition 1.0
OUTSIDEINSIDE RENDERDRAINAGEINSULATIONSTRUCTUREVAPOURFINISH RAINCAPILLARY MOISTUREVAPOURAIR LEAKAGE DEW-POINT ZONE SOURCE → PATH → ACCUMULATION → DRYING
The moisture path must be traced from its source to safe drying.
Document Passport
Code
REN-001
Series
Engineering Notes
Category
Building Physics
Status
Living Edition
Language
RUS / EST / ENG
Edition
1.0
Engineering Position

Moisture Is a
Process

A dry surface does not always mean a dry structure. House of RAMERK traces moisture from its source and path of movement through accumulation and safe drying, preserving evidence before concealed layers are closed.

01 · Principles

Moisture Is a Process

SourceRain, leaks, ground moisture, indoor humidity, and wet construction materials.
PathCapillary transport, air movement, diffusion, and gravity.
ExitDrainage, ventilation, diffusion, and controlled drying time.
Engineering Notes do not replace project-specific calculations, manufacturers’ requirements, or applicable regulations. They preserve the questions that must be asked before the work is accepted.
02 · Analysis

Moisture Behaviour

ConditionWhat It MeansTypical Consequence
Free WaterRainwater or leakage passing through openings and defective junctions.Rapid wetting, staining, deterioration, and corrosion.
Capillary RiseWater is drawn through pores and narrow joints.Rising damp and saturation of contact zones.
Air TransportMoist air passes through gaps and cools within the structure.Concealed condensation at discontinuities.
Vapour DiffusionWater vapour moves through materials because of differences in partial pressure.Seasonal moisture accumulation caused by an incorrect layer sequence.
Construction MoistureWater remaining in concrete, render, screed, timber, or insulation.Closing structures before they have dried safely.
03 · RAMERK On-Site Method

Observe Before Acceptance

Identify the Source

Differentiate external water, internal humidity, and residual construction moisture.

Trace the Path

Inspect penetrations, joints, flashings, roof edges, foundations, and air-leakage paths.

Measure Consistently

Record the instrument, method, location, environmental conditions, date, and reference point.

Confirm Drying Capacity

Before closing, confirm drainage, ventilation, and vapour permeability.

Preserve the Evidence

Photograph concealed layers and retain measurements in the project passport.

04 · Warning Signs

Signs Requiring Attention

Uneven DryingOne area remains darker, colder, or wetter than the surrounding surface.
Recurring StainsA stain returns after drying or rainfall, indicating that the source has not been eliminated.
Cold Interior SurfacesA low surface temperature may increase local relative humidity and the risk of mould.
Enclosed Wet LayersFinishes or membranes are installed before the substrate reaches an acceptable moisture level.
05 · On-Site Checklist

Before the Structure Is Closed

Water-drainage details are continuous and accessible for inspection.
Substrate moisture has been measured using the established method.
Timber and mineral materials show no signs of prolonged wetting.
Airtight and vapour-control layers are continuous at junctions.
A safe drying direction is maintained.
Photographs and measurements are retained in the project archive.
House of RAMERK · Engineering Notes

Keep water out.
Allow the structure to dry.

REN-001 preserves a shared engineering language for future projects.