The Swedish company ThermoGaia AB has sole sales rights in the Nordic region for ThermoShield® brand, which the company markets under its own brand Termoskydd. The paint is marketed with properties such as energy savings by heat reflection and solves moisture problems because the paint can both be diffusion open or closed due to climatic conditions and function like a variable vapor barrier. These unique features come from a combination of a special binder with ceramic beads. The unique properties of the color at varying humidity conditions are in particular of interest to study and evaluate, which is also the purpose of the this study. By experimentally creating two different closed climates with differentiated relative humidity between both sides of a material, concentration differences will occur in the prevailing vapor concentrations provided that constant temperature prevails. Variations in vapor levels create pressure differences that become the driving force of the moisture transport that takes place in the form of diffusion that occurs onedimensional. The method used in the study is a modified version of the standardized cup method. Periodic measurements of weight differences continued until stationary conditions were reached. The collected measurement data is then used to calculate the water vapor migration. The result of the study shows that the color has the ability to have a lower resistance if the surrounding climate has low relative humidity, the greater the concentration difference between the vapors. When the surrounding climate instead has a high relative humidity, the color showed a higher resistance when the greatest concentration difference occurs. The study's conclusion from the problem formulation is that the causal relationship between the relative humidity and water vapor migration for the color tends to change the resistance, depending on the vapor content of ambient air, provided that stationary conditions prevail.

Under uppvärmda byggnader med grundkonstruktionen betongplatta på mark sker ett värmeflöde ner i marken. Flödet kan liknas med bågformade pilar som strömmar från plattans mitt ut mot kanterna. Vid ökande plattstorlekar kommer värmeflödet från de centrala delarna att hindras på grund av markens ökande värmemotstånd. Värmen lagras då och en temperaturökning sker i marken. Om plattan är tillräckligt stor kommer temperaturen i marken stiga till den grad att risk för skadlig fuktdiffusion uppstår. Drivkraften för fuktflödet är skillnaden i ånghalter mellan den fuktiga marken och den torrare inomhusluften. Om en tät golvbeläggning appliceras på betongen finns det risk att fukten stängs in och leder till problem. De flesta golvbeläggningar har en kritisk relativ ånghalt att förhålla sig till innan golvet tar skada och beror på temperaturskillnaden över konstruktionen. En högsta tillåten relativ ånghalt på 85% under golvbeläggningen motsvarar med förenklingar en temperaturskillnad på 3°C. Avståndet från ytterkanten av plattan där marken uppnår en temperatur som skiljer sig 3°C eller mindre från inomhustemperaturen benämns som kritiska gränsen där skadlig fuktdiffusion kan uppstå. Genom att undvika en hög marktemperatur går det att skydda konstruktionen från fuktproblem. Hur temperaturfördelningen i marken under plattan påverkas vid succesivt ökande plattstorlekar undersöktes både stationärt och dynamiskt med handberäkningar och simuleringar. Plattorna simulerades för Malmö, Gävle och Kiruna. Resultaten visar hur isoleringsmängden tycks ha störst betydelse för temperaturfördelningen. Exempelvis för en plattkonstruktion med 300 mm underliggande isolering i Malmö visade det sig att risken för fuktproblem uppkommer först vid plattbredder på 90 meter, medan det med 100 mm isolering uppstår problem redan vid 40 meter eller större. En större mängd isolering kan alltså fungera som fullgott fuktskydd även för stora plattstorlekar. Temperaturvariationerna i utomhusluften över året leder till svängningar i temperaturen i marken under plattans yttre delar med ett inträningsdjup på cirka 10 meter. Årsvariationernas inverkan på marktemperaturen visade sig inte leda till tillräckligt höga temperaturer för att fuktproblem skulle uppstå i någon av plattorna i de undersökta städerna. / Underneath heated buildings with the foundation structure of a concrete slab on the ground, heat flows into the ground. The flow can be visualized as arc-shaped arrows that move from the center of the slab out towards the edges. With increasing slab sizes, the heat flow from the central parts will be reduced due to the increasing heat resistance of the soil. This will lead to a thermal build up in the ground under the slab with increasing temperature as a result. If the slab is large enough, the temperature in the ground will rise to the point where there is a risk of harmful moisture diffusion. The moisture flow is driven by the difference in the vapour content between the moist soil and the drier indoor air. If a non-permeable floor covering is applied to the concrete, there is a risk that the moisture will be trapped and lead to problems. Most floor coverings have a critical relative humidity that will lead to damage. It depends on the temperature difference through the structure. A maximum permissible relative humidity content of 85% under the floor covering corresponds to a temperature difference of 3°C. The distance from the outer edge of the slab where the ground reaches a temperature that differs 3°C or less from the indoor temperature is referred to as the critical limit at which harmful moisture diffusion can occur. By avoiding a high ground temperature, it is possible to protect the structure from moisture problems. How the temperature distribution in the ground under the slab is affected by successively increasing slab sizes is investigated both stationarily and dynamically with hand calculations and simulations. The slabs were simulated for Malmö, Gävle and Kiruna. The results show how the amount of insulation seems to have the greatest impact on the temperature distribution. For example, a slab structure with 300 mm underlying insulation in Malmö shows that the risk of moisture problems arises at slab widths over 90 meters, while with 100 mm insulation, problems already arise at 40 meters or larger. A thick layer of insulation can thus function as adequate moisture protection even on larger slabs. The temperature variations in the outdoor air over the year lead to fluctuations in the temperature of the ground under the outer parts of the slab with a penetration depth of about 10 meters. The impact of the annual variations in the soil temperature did not turn out to lead to sufficiently high temperatures for moisture problems to occur in any of the slabs in the investigated cities.

In spring 2023, two engineering students from Jönköping University collaborated with GBJ Bygg Jönköping to investigate the impact of moisture on cross-laminated timber (CLT) and its drying process. The study aimed to identify potential issues, damages, and propose mitigation methods. Through measurements and investigations, this study generated in-depth knowledge of moisture effects on CLT, ensuring proper material handling to avoid long-term negative consequences.The methodology involved quantitative investigations to obtain credible results. Experiments simulated the application of wet macadam on a CLT floor slab in a natural environment to measure time to reach an acceptable moisture content. Collaboration with GBJ Bygg provided access to information, materials, and simulation facilities. Two tests were conducted: immediate construction after placing washed macadam and a 9-day drying period before reconstruction. Results showed that direct macadam application led to high timber moisture content, while drying according to industry recommendations resulted in low moisture content without negative consequences. The drying process varied depending on reconstruction timing, and methods like extending macadam drying time were proposed to reduce damages and shorten the drying period.The discussion of results demonstrated data relevance with limited room for misinterpretation. However, the study's time frame limited complete results, and the lack of prior research on timber drying affected connections to previous studies. The clearest answer came from the 9-day drying test, showing a decrease in moisture content. Some measured values deviated, possibly due to measurement errors. Facility climate and construction execution posed potential error sources. Despite limitations, the experiment effectively addressed the study's purpose and research questions.