Rockland Library Assessment Executive Summary

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Pearl Cunningham
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1 Rockland Library Assessment Executive Summary performed for City of Rockland, Maine 270 Pleasant Street Rockland, ME February 2, 2016 Civil & Structural Engineering 132 Brentwood Street Portland, ME GENERAL CONDITION OF MORTAR 1

lor, and aggregate. c. Large joints require higher mortar volume, deeper recesses, and more preparation than sawn stone.

2 - MOISTURE INTRUSION EXTERIOR MASONRY WALLS 1. GENERAL CONDITION OF MORTAR (repointing cuts too shallow) 1. GENERAL CONDITION OF MORTAR SUMMARY a. Recommend replacing mortar for entire building (new and old) b. Recommend mortar analysis to determine proper pointing mix, color, and aggregate. c. Large joints require higher mortar volume, deeper recesses, and more preparation than sawn stone. Typically need to cut back joint twice the width! d. Perform work as part of larger project at north and south parapets e. May consider separating buildings to ensure qualified masons working on 1904 building 2

3 2. GENERAL CONDITION PARAPETS AND CHEEK WALLS 2. GENERAL CONDITION PARAPETS AND CHEEK WALLS 3

4 2. GENERAL CONDITION PARAPETS AND CHEEK WALLS 3. NORTH WALL AND PARAPET 4

5 3. NORTH WALL AND PARAPET TOP FAILED LEAD FLASHING AT PARAPET EDGE; BOTTOM: FAILED LEAD WEATHERCAP SEALANT 3. NORTH WALL AND PARAPET TOP: LOOSE RUBBLE, NO TIE-BACK TO GRANITE EXTERIOR; BOTTOM: ROT AT END OF ROOF TRUSS MAY REQUIRE ADDITIONAL SHORING 5

6 3. NORTH WALL AND PARAPET TRUSS BOTTOM CHORD BEARING AT ADDITIONAL BRICK WYTHE IN ATTIC. 4. GUIDANCE ON PLANTINGS TRIM TREES THAT ENCROACH ON BUILDING EVERY OTHER YEAR 6

7 4. GUIDANCE ON PLANTINGS MINIMAL PLANT REMOVAL SOUTHWEST EXCEPT AT RAILING 4. GUIDANCE ON PLANTINGS TRIM BIRCH TREES TO MINIMIZE SHADING AND ROOF DEBRIS 7

8 5. SOUTH CHIMNEY WATER INTRUSION 5. SOUTH CHIMNEY WATER INTRUSION LIKELY BEST SOLUTION REBUILD TOP PARAPET RE-ROOF QUIET ROOM RE-ROOF BUILDING, REPAIR FLASHING 8

9 1. GENERAL CONDITION OF MORTAR 1. GENERAL CONDITION OF MORTAR 9

10 4. GUIDANCE ON PLANTINGS TRIM TREES EVERY OTHER YEAR 3. MORTAR FAILURE ON ACTIVE CHIMNEY Rebuild top 5 to 7 courses upper CMU block has failed 10

11 3. MORTAR FAILURE ON ACTIVE CHIMNEY Rebuild top 5 to 7 courses upper CMU block has failed 4. MORTAR FAILURE ON WEST ENTRANCE PARAPET Must assess and confirm if parapet is plumb 11

12 4. MORTAR FAILURE ON WEST ENTRANCE PARAPET Must confirm anchorage details 4. MORTAR FAILURE ON WEST ENTRANCE PARAPET Must confirm anchorage details 12

13 4. MORTAR FAILURE ON WEST ENTRANCE PARAPET 6. ROOF DRAINAGE AT CHILDREN S GARDEN 13

14 6. ROOF DRAINAGE AT CHILDREN S GARDEN 6. ROOF DRAINAGE AT CHILDREN S GARDEN 14

15 6. ROOF DRAINAGE AT CHILDREN S GARDEN 6. ROOF DRAINAGE AT CHILDREN S GARDEN Enlarge catchment; provide larger downspout from gutter 15

16 6. ROOF DRAINAGE AT CHILDREN S GARDEN Seal gaps around former interior drain 6. ROOF DRAINAGE AT CHILDREN S GARDEN Seal gaps around former interior drain 16

17 6. ROOF DRAINAGE AT CHILDREN S GARDEN Seal gaps around former interior drain 6. ROOF DRAINAGE AT CHILDREN S GARDEN Seal gaps around former interior drain 17

18 7. WINDOW SASH AND SILL DAMAGE REPLACE SILL AND SASH; UNIT IF NECESSARY 8. WINDOW HEADER DAMAGE REPLACE STEEL LINTEL HEADER 18

19 OPINION OF PROBABLE REHABILITATION COSTS OPINION OF PROBABLE REHABILITATION COSTS 19

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22 THANK YOU QUESTIONS? 22

Nathan Clifford School Building Conditions Assessment Report

Nathan Clifford School Building Conditions Assessment Report Submitted To: The City of Portland April 12, 2013 Prepared By: Winton Scott Architects Becker Structural Engineers, Inc. Conditions Assessment