## 4 Findings
### Standard and Marine Service Conditions
\begin{table}
\begin{tabular}{l c c} \hline \hline \multirow{2}{*}{**Predicted Service Life and Performance Parameters**} & \multicolumn{2}{c}{**Service Conditions**} \\ \cline{2-3}  & **Standard** & **Marine Environment** \\ \hline Service life prediction MRCP\({}_{60\%}\) & 44 & 35 \\ Service life prediction MRCP\({}_{40\%}\) & 64 & 54 \\ Expected service life interval \({}^{\star}\) MRCP\({}_{60\%}\) & 39–50 & 30–40 \\ Expected service life interval \({}^{\star}\) MRCP\({}_{40\%}\) & 59–70 & 49–59 \\ Component performance interval expected \({}^{\star}\) at life expectancy of MRCP\({}_{60\%}\) & 52–69 & 55–65 \\ Component performance interval \({}^{\star}\) expected at life expectancy of MRCP\({}_{40\%}\) & 32–49 & 35–45 \\ \hline \hline \end{tabular}  
* \(p=0.80\) (\(p\)—statistical probability).  
\end{table} 
Table 6: Service life expectancy, PSLI, and predicted component performance interval, PCPI, of wet-fixed stone cladding. Figure 6: Deterioration pattern of wet-fixed exterior stone claddings in marine environment service conditions. according to Equation (1) gave values for the LELC = 0.94-0.97, indicating the moderate impact of the marine environment service regime on the service life expectancy of dry fixed exterior stone cladding. The service life expectancy of dry-fixed stone claddings subjected to standard conditions and marine environment are summarized in Table 7.  
The LELCs express the effects of the marine environment service conditions on the reference service life of wet- and dry-fixed stone claddings are presented in Table 8. These findings reveal the main differences in the impact of marine environment on the performance of the two fixing techniques under discussion, i.e., the dry-fixed stone cladding method is less vulnerable to the marine environment service conditions. This conclusion is derived from the finding that the LE of Dry-fixed cladding in marine environment (for MRCP = 60) is 55, whereas the wet-fixed stone cladding is 35, and the prediction intervals of the at probability of 0.8 are distinctive (47-63 years for dry-fixed stone and 30-40 years for wet fixed stone--see Figures 6 and 7 and Tables 6 and 7). Nevertheless, the durability of the dry-fixed cladding is highly dependent on the performance of the stone and the fixing details and, therefore is highly dependent on the adherence of the design and construction to the technical parameters of the cladding systems, such as anchors resistance, suitability between the stone and joints materials and boundary details, such as the facade cornice and drip-edge). Based on the data in Table 7, the degradation impact due to the exposure to marine environment conditions can be calculated according to Equation (3):  
\[EF_{A-B}=\frac{1-LELC_{A}}{1-LELC_{B}} \tag{3}\]  
where,  
EF\({}_{\rm A-B}\)--Coefficient expressing environmental conditions impact for alternative exterior cladding fixing techniques A (Wet-fixed) and B (Dry-fixed);  
LELC\({}_{\rm A}\) and LELC\({}_{\rm B}\)--Coefficients expressing the Life Expectancy Limiting ratio for Wet and Dry fixed stone claddings, respectively. From values presented in Table 7, EI\({}_{\rm A-B}\) for MRCP60% and MRCP40% can be calculated as 3.50 and 5.33, respectively. These findings reveal that the impact of marine environment service conditions on the deterioration of wet-fixed stone cladding is 3.5 to 5 times higher than on dry-fixed stone cladding.