The construction industry stands in front of a challenge to decrease theirclimate footprint in order to build more environmentally friendly. There iscurrently a desire to investigate the possibility to use wood to a largerextent. Compared to the more conventional building materials, wood has ahigher risk of being damaged due to moisture, which can lead to moldgrowth. In Boverket’s Building Regulations its stated that buildings are tobe designed to ensure that conditions detrimental to human health areavoided.The report has investigated the moisture-technical possibilities of usingcross-laminated timber, CLT, instead of concrete in large-scaleconstructions.Moisture simulations of four different structural parts has been conductedwith concrete and CLT as the supporting structure. The simulations showedthat there is no theoretical risk of moisture damage. The study shows that itis possible to change the materials, but that the right conditions arerequired to protect and prevent the occurrence of moisture damages duringproduction. At present, there is no possibility to guarantee that moisturedamages on CLT is avoided without the use of weather protection. A wellworkedmoisture safety plan is essential for a moisture-proof productionphase, the use of industry standard ByggaF can be a valuable and vital toolto ensure it.