Prior to embarking on a DER project, it is important to remediate any hazardous conditions that will be affected (e.g. exposed or aggravated) by the planned DER work. Also, it is wise to ensure that there are not more serious problems lurking. A DER project - however worthy the goals may be - should not divert resources from where they are more urgently needed. Before embarking on a DER project, inspect and assess the building for:
The structural system must be structurally sound before high performance retrofit work can begin. Similarly, the electrical system must provide basic electrical safety. Ideally, the electrical system would be brought up to date with current code and brought into alignment with current and projected building needs. The presence of knob-and-tube wiring will preclude retrofit of the enclosure. Hazardous materials that will be affected by the DER work or that may impact the indoor air quality must be remediated and/or removed. Any water leaks, either weather-related leaks or plumbing system leaks should be repaired prior to the DER work unless the DER work will remove the source of the water leak (e.g. if the roof surface or leaking section of plumbing is to be replaced as part of the project). Any framing that shows signs of rot or decay should be replaced. This frequently applies to the framing sill in older buildings. Also, any framing that exhibits pre-conditions for rot or decay - i.e. damp wood - will require remediation. Past insect/pest damage must be evaluated for impact on the building. Current insect/pest activity must be remediated before DER work can proceed.
Follow applicable laws and industry procedures for mitigation of hazardous materials. Engage the services of a qualified professional when needed.