Richard Nuhn by byprogressivethought

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									                                                                         ROOFING/STRUCTURAL/WATERPROOFING
 Richard A. Nuhn, P.E. Consultants                                       ENGINEERING/ANALYSIS/INVESTIGATIONS


 1913 Thayer Circle    !   Greensboro, NC 27407        !       336-855-1182 !   ricknuhn@m indspring.com



                            PROJECT FIELD REVIEW OF April 16, 2009

                                 Oak Ridge Elementary School


ADDRESS:     O ak R idge R oad, G reensboro, N C

CONTRACTOR: unknow n

ATTENDEES: Aldine Clinard,

W EATHER: O vercast, light rain, Tem ps in m id 60's

PURPOSE OF SITE VISIT: R eview gym nasium w all conditions that are of concern follow ing observation of
peeling paint on the east w all. G C S em ployees were present to provide a m anlift to access the upper levels
of the w all on the exterior and to rem ove w all panels as necessary to observe concealed conditions.




JOB SITE NOTES - June 16, 2009:
1.      The design of the G ym roof for storm w ater drainage utilizes 4 openings near the perim eter of the roof
        the tie-into downspouts that are recessed into the brick facade. The original downspouts are m ade
        of copper.

2.      Im m ediately under the roof perim eter is a sm all fascia overhang that conceals portions of the
        downspout assem bly. The m etal panel and plyw ood she athing w ere rem oved to allow visual
        exam ination of the copper dow nspout.

3.      The downspout has a 45 degree bend com ing off the m etal insert in the roof, follow ed by another -45
        degree bend to line up the roof opening with the downspout that extends to the ground. O ne of the
        joints in the 45 degree bend is leaking and w ater is present on the brick and m asonry block surfaces.
        W ater is actively dripping at this tim e.

4.      W ood m aterials used in the fram ing of the overhang in the area adjacent to the dow nspout w ere found
        to be intact and w ithout m oisture dam age.

5.      The underside of the roof deck and the supporting steel structure w as observed. No dam age to the
        roof deck or corrosion of the steel w as found.

6.      The east-side interior w alls of the gym w ere reviewed in the areas in line with the d ow nsp ou t. The
        paint has separated from the block surface and efflorescence w as ob served. It was noted that
        conditions w ere w orse w here there did not have block-filler/prim er under the finish coat of paint.

7.      There was one additional location on the east w all w here peeling paint was observed. The location
        did not line up directly w ith a roof dow nspout b ut w as nearly in line w ith an area of the brick face
        w here a patch had been m ade in the past. M issing m ortar or sealant w as ob served in the joint
        betw een the original brick and the repair.

8.      There were no roof leaks in the gym at this tim e.



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                                                                       ROOFING/STRUCTURAL/WATERPROOFING
 Richard A. Nuhn, P.E. Consultants                                     ENGINEERING/ANALYSIS/INVESTIGATIONS


 1913 Thayer Circle    !   Greensboro, NC 27407      !       336-855-1182 !    ricknuhn@m indspring.com


9.      The exterior brick facade w as review ed on the east w all and there w as no evidence of m oisture within
        the assem bly or efflorescence on the exterior.

10.     A t the conclusion of the field review , the plyw ood sheathing and the m etal panels were replaced
        tem porarily.


Sum m ary: The paint peeling is the result of m oisture build-up in the m asonry m aterials due to w ater leaking
from the dow nspout connectio ns. R epairs should be m ade to the dow nspout to create a w ater-tight joint.
O nce the m asonry is dry, the interior w all should be properly cleaned and prepared to receive new prim er and
finish coat.



Respectfully submitted,



Richard A. Nuhn, P.E.
Registered Professional Engineer




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