CF-TownC CHC-CS 860522 ARCHITECTURE
PLANNING · INTERIORS
May 22, 1986
Mr, Ed Powell
City Engineer
City of Coppell
P.O. Box 478
Coppell, Texas 75019
RE: Coppell Town Center
Project No, 8457
Dear Ed:
Attached herewith is a copy of a letter received from Manville Build-
ing Materials Corp. dated May 12, 1986 regarding the under roof deck
insulation at the Coppell Town Center project. This letter, from
Mr, F, Gene Smith of Manville Building Materials Corp. is in response to
some concerns I expressed with regard to the insulation being installed
at the above referenced project, indeed meeting the R-22 insulating
value.
As a brief explanation, some three weeks ago during a visit to the pro-
ject site, it was noted that there existed some problems with the insul-
ation which has been installed to the underside of the roof deck area.
Since that day, the General Contractor and his subcontractor, Whitman
Enterprises have begun corrective action to resolve this problems, The
following is a listing of the discrepancies noted.
1. The first problem which was noted is referenced in the letter which
we received from Mr. F. Gene Smith of Manville Building Materials
Corp. After reviewing the installation, we had questions as to
whether the 7" assembly of 2 layers of 3-1/2" insulation provided
the required R-22 insulating value, This question was raised due
to the fact that when you review the manufacturer's printed liter-
ature on the Manville insulation, the manufacturer states that to
obtain an R-22 insulating value, a 7-1/2" insulation back is re-
quired, Per Mr. Smith's letter of May 12, 1986 he confirms that
the insulation which is presently in place does indeed achieve the
R-22 insulating value.
2. During our site inspection it was noted that the General Contractor
had failed to install approximately 6500 sq. feet of insulation to
2850 Lincoln Plaza · 500 North Akard · LB 16 · Dallas, Texas 75201-3394 ° (214) 954-3100
McKinney Place · 3131 McKinney Avenue ° Suite 850 - LB 113 · Dallas, Texas 75204 · (214) 871-9100
Mr, Ed Powell
May 22, 1986
Page 2
the underside of the roof deck assembly. The areas noted were
above the main lobby area, library, City Manager's office, and
Finance Department. This item was reviewed with the General Con-
tractor, and as of this date, work is proceeding to resolve this
matter,
3, During our site inspection it was noted that the insulation sub-
contractor had installed a mixture of foil-faced bat insulation
and also Craft Paper faced insulation to the underside of the
roof deck area, As this area above the second floor ceiling is
considered a return-air plenum, Craft Paper faced insulation is
not allowed because of potential problems which could be encoun-
tered in the event of a fire in this area, At this time, the
insulation subcontractor is removing all Craft Paper faced insul-
ation from this area and replacing it with the required foil-back
insulation.
4. During our inspection it was noted that the application of 2 layers
of 3-1/2" insulation did not appear to be consistent throughout the
underside of the roof deck area. Another problem which was noted
was that in some instances 2 layers of foil-back insulation were
applied one on top of the other and this presents the potential for
a mildew problem in those areas. At this time the General Contrac-
tor and the insulation subcontractor are reviewing the entire
installation of insulation to the underside of the roof deck area
and are in the process of correcting the discrepancies noted above,
Should~have any questions or request additional information, please
d~~itate to contact me.
Richard J, Bertani
Director of Construction Administration
RJB/sdc
cc: Mr, Frank Procter Mr. Jack Waschitz
Mr, Larry Lieneke