2. Are bricks to be left out at supports to inspect and clean out the cavity? 3. Will a drag-board be used to help keep the cavity clean? 4. Is the insulation to be shoved into wet mortar parging and held in place by clips? 5. Are there open head joints and flashings at all masonry supports? 6. Are flashings extended out and exposed to create a drip? 7. Verify wall reinforcing and lintels do not extend through control joints. 8. Are masonry control joints in the facing and backup appropriately staggered? 9. Will wall cavity be closed off at all masonry openings? 10. Will wall cavity be sealed at corners and at roof line? Installer BCS c. Clean cavities (2" minimum preferred) in walls: (See SPECIFICATION FOR “GUIDE CONSTRUCTION OF EXTERIOR RAIN SCREEN WALL,” Pages VIII. 1-2.) Although small dimension, clean cavities are theoretically possible, a nominal 2" continuous clean air cavity in the exterior wall system between the insulation and the back of the face brick is needed to practically accomplish this objective. This will allow easy venting of the cavity as well as proper drainage, prevent mortar bridging, accommodate a board or other temporary device being placed in the cavity to keep it clean, and provide ease for the mason to grasp a facing unit and lay it in a bed of mortar without a hand contacting the parging, insulation or back-up masonry. It is quite remarkable how clean a mason can keep a 2 inch cavity when trying to do so. Back beveling of the mortar bed and minimum furrowing are
2. Are bricks to be left out at supports to inspect and clean out the cavity? 3. Will a drag-board be used to help keep the cavity clean? 4. Is the insulation to be shoved into wet mortar parging and held in place by clips? 5. Are there open head joints and flashings at all masonry supports? 6. Are flashings extended out and exposed to create a drip? 7. Verify wall reinforcing and lintels do not extend through control joints. 8. Are masonry control joints in the facing and backup appropriately staggered? 9. Will wall cavity be closed off at all masonry openings? 10. Will wall cavity be sealed at corners and at roof line? Installer BCS c. Clean cavities (2" minimum preferred) in walls: (See “GUIDE SPECIFICATION FOR CONSTRUCTION OF EXTERIOR RAIN SCREEN WALL,” Pages VIII. 1-2.) Although small dimension, clean cavities are theoretically possible, a nominal 2" continuous clean air cavity in the exterior wall system between the insulation and the back of the face brick is needed to practically accomplish this objective. This will allow easy venting of the cavity as well as proper drainage, prevent mortar bridging, accommodate a board or other temporary device being placed in the cavity to keep it clean, and provide ease for the mason to grasp a facing unit and lay it in a bed of mortar without a hand contacting the parging, insulation or back-up masonry. It is quite remarkable how clean a mason can keep a 2 inch cavity when trying to do so. Back beveling of the mortar bed and minimum furrowing are
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