Moisture and fungal spore transport in outdoor air-ventilated crawl spaces in a cold climate

The objective of that study was to find out the important properties of ground covers, the optimal air change rates for the controlling of moisture conditions in an outdoor air-ventilated crawl space in a cold climate, and to estimate the acceptability of current moisture conditions in respect of material durability. In addition, factors affecting the transport indoors of possible pollutants from crawl spaces were studied.
The moisture conditions were calculated with a dynamic simulation model, which was validated against measured data.

Moisture conditions and energy consumption in heated crawl spaces in cold climates

The aim of that study was to find out if heating is the alternative for crawl space moisture control with a reasonable low energy consumption. Using a ground cover without thermal insulation and heating of the crawl space proved to be a good alternative method to control mold growth.

Moisture conditions in highly insulated outdoor ventilated crawl spaces in cold climates

The aims of that study were to find out how the thermal capacity, resistance, and the placement of insulation layers affect relative humidity in crawl spaces. The results show that there are two alternative ways to use ground covers in combination with air change to achieve acceptable conditions in crawl spaces.

On the crawl space moisture control in buildings

The aims of that study were on the one hand to find out how relative humidity can be reduced by optimal selection of ground covers and air change rates, and on the other hand to evaluate the acceptability of achieved moisture conditions by means of mould growth analyses. Two buildings (one relatively warm and the other relatively cold) were studied with the resistance-capacity network model. Simulations of thermal and moisture buffering effects of air change rates and various ground covers were made.

Microbial contamination of indoor air due to leakages from crawl space - a field study

The aim of that study was to find out if a potential air flow from crawl space has an influence on the indoor air quality : is there a potential risk for the first floor apartments ? A balanced ventilation system is recommended.

A study of area and personal airborne asbestos samples during abatement in a crawl space.

Air sample data were collected during asbestos abatement of two buildings using area and personal sampling methods. Abatement involved removal of pipe insulation from crawl spaces. The two sampling methods were compared to determine if there was a relationship between them. A relationship was observed between area and personal airborne samples in building 2 as determined by correlation and regression but is most likely due to chance. One major outlier was detected for both area and personal measurement sample data sets in building 2.

Crawlspace condensation.

Through the roof.


Moisture conditions of outdoor air ventilated crawl spaces in apartment buildings in a cold climate.

The effects of air change and ground covers on crawl space moisture balance in a cold climate are discussed in this paper. The objectives were to assess the suitability of outdoor air-ventilation in the crawl spaces of apartment buildings, to determine the optimum air change rate with and without ground covers, and the effect of the ground covers' thermal insulation on moisture behaviour. Measured data from the test building was used to develop the crawl space model in a modular simulation environment, where the parametric simulations were carried out.