Preparation - Conduct pre-construction inspection to include an Infrared scan and document existing conditions. - Secure and protect all rooftop equipment to include the removal and replacement of the Lightning Arrest system as needed during the construction process. - Remove loose debris, dirt, and any materials that would inhibit adhesion or attachment of the new membrane. - Make minor repairs to existing membrane as needed for a smooth substrate (e.g., blisters, ponding areas, punctures). - Verify substrate suitability and slope for positive drainage. 3.2 Insulation/Separation Layer (if required) - Install a separator board or insulation (e.g., high-density Polyiso (polyisocyanurate) or cover board) per manufacturer’s requirements if the existing membrane is incompatible or uneven. - Secure board using approved mechanical fasteners or adhesive as specified. - Replace any wet, damaged, rigid roof insulation as needed. 3.3 Fleece-Back TPO Membrane Installation - Install fleece-back TPO membrane (minimum 60 mil thickness) over prepared substrate using approved low-rise foam adhesive or mechanical fastening system, as specified by the manufacturer, to include coverage of all parapet walls to terminate under the coping. - Ensure proper overlap and heat-weld all seams using hot-air welding equipment. - Perform probe testing of seams to verify weld integrity...
