Moisture is the most important natural agent responsible for deterioration of the building enclosure. The amount of water deposited on the above-grade building envelope by driving rain is generally larger than any other source, including condensation, in almost all cases. Rain deposition can result in staining, leakage, dimensional change, freeze-thaw damage, leaching, efflorescence, and biological deterioration. Water penetration of the cladding can cause similar problems within a wall. Vapour diffusion can also move water that penetrates or is stored in the cladding inward where it can cause serious wetting of framing, sheathing, etc. (Straube et al 1998a). Despite the importance of driving rain to building performance, there is a lack of quantitative data relating to the magnitude, duration, and frequency of rain deposition of on buildings. This data is especially important for use as input to those hourly hygrothermal building enclosure simulation packages such as WUFI (Kuenzel et al, 1997), that can properly model rain absorption. Complex CFD modelling packages which require detailed input of building and site geometry are not practical for most situations in design offices.

• wind driven rain

1. A review of rain control and design strategies
2. Drainage, ventilation drying and enclosure performance
3. Driving rain and building facades
4. Field testing of filled-cavity wall systems
5. Indoor air quality, healthy buildings, and breathing walls
6. Methodology and design of field experiments for monitoring the hygrothermal performance of wood frame enclosures
7. Moisture control in enclosure wall systems
8. Moisture fundamentals and mould
9. Moisture in buildings
10. Moisture movement in building enclosure wall systems
11. Overview of hygrothermal (HAM) analysis methods
12. Pressure moderation and rain penetration control
13. Rain control and screened wall systems
14. The influence of low-permeance vapor barriers on roof and wall performance
15. The role of hygrothermal modeling in practical building design: case studies
16. Vents, ventilation drying, and pressure moderation  

1. A review of rain control and design strategies
2. Development of design strategies for rainscreen sheathing membrane performance in wood frame walls
3. Drainage, ventilation drying and enclosure performance
4. Driving rain and building facades
5. Field testing of filled-cavity wall systems
6. Moisture movement in building enclosure wall systems
7. Overview of hygrothermal (HAM) analysis methods
8. Rain control and screened wall systems
9. The Ontario wall drying project
10. Uncertainty analysis for vapor pressure measurement
11. Ventilation drying in enclosure wall systems
12. Vents, ventilation drying, and pressure moderation