b'ROOF ALTERATIONStion of the roof, non-destructive inves- loadrequirements,thentheroofisSTEP 4:tigationmustbeperformedfromtheconsidered a Climate Adaptable Roof.Verification of the Altered Condition very beginning. The results are validatedIf the resistance is lower than the futureOnce the necessary alteration has been withrandomizedtestcutsbeforetheclimate load requirements, then the alter- implemented,itisnecessarytoverify existing resistance is quantified throughation table is referred to. The assessmentthat the planned design was installed as destructive forensic investigation. Sinceoftheconditioncanbesummarized per specification. To achieve the verifi-commercial roofs have very large surfacein Figure 3. cation, the flow chart has to be imple-areas, there can be anomalies, and it isIn the event that the roof falls undermented once more to ensure the resis-importanttohaveaccurateinforma- the failed category, then partial compli-tion. To achieve this, a protocol is beingancewiththeflowchartisrequired.tanceofthealteredroofexceedsthe developed for test cuts to identify theThe alteration that must be followed isfuture climatic load by undertaking the size requirements, the frequency and aimplemented and verified to ensure thefollowing steps: confidence level for the results obtained.Incorporating future climatic data required climatic resistance is met.Theinformationextractedfromthein the design;forensicinvestigationwillbevalidated withfutureclimaticloadrequirementsSTEP 3: Selecting an appropriate alterationtodetermineiftheroofsresistanceDetermination of Alteration Optionsthat achieves a higher resistance exceeds the future climatic load require- Variousalterationoptionsarebeingthan the calculated load; and ments. If the resistance of the currentreviewed and will be discussed with allVerifying the field installation ofroof is greater than the future climaticprovincial roof contractor associations.the alteration. Figure 3: Flowchart for assessing the condition of existing roofs. 20 lROOFINGBClFALL 2022'