HomeMy WebLinkAboutRes 2016-01-138 PD Roof RepairCITY OF ANNA, TEXAS
RESOLUTION NO. 2016-1-
A RESOLUTION OF THE CITY OF ANNA, TEXAS APPROVING AND AUTHORIZING THE
CITY MANAGER TO ALLOCATE A PORTION OF THE FY 2016 CONTINGENCY
ALLOCATION
WHEREAS, The City of Anna (the "City") maintains a contingency allocation for the use of
unforeseen items of expenditure;
WHEREAS, The roof of the Police Department/Municipal Annex building (the "annex roof")
experienced significant damage throughout October, November, and December resulting in
numerous leaks and failed repairs;
WHEREAS, The City Council (the "Council") sees the need to repair the annex roof;
WHEREAS, The City has obtained competitive quotes consistent with its purchasing policies
for services to be rendered; and,
WHEREAS, funds are available in the City's General Fund contingency allocation subject to
approval of the City Council;
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF ANNA,
TEXAS, THAT:
Section 1. Recitals Incorporated.
The recitals above are incorporated herein as if set forth in full for all purposes.
Section 2. Contingency Appropriation
Consistent with Section 7.08 of the Anna City Charter, the City Council hereby authorizes the
City Manager to transfer $24,907.32 from the FY 2016 General Fund Contingency
Appropriation to the General Fund for roof repairs to the Police Department/Municipal Annex.
,
PASSED by the City Council of the City of Anna, Texas, on this 12th day of January 2016.
ATTEST:
138
Office (817) 568-8300
November 2, 2015
Attn: Chief Kenneth Jenks
Anna Police Department
D & G QUALI TY ROOFING INC.
4305 FM 1187 Suite 100
Burleson TX, 76028
FAX (817) 568-0029
Re : Flat Roof Report, Police Station, Anna TX
Chief Jenks ,
On October 26 , 2015 , I conducted an inspection of your police station. Below are my findings.
ID
There are several leaks noted throughout the building including the Utilities Dept.
The leaks were widespread and numerous and seem to have been occurring for some time.
Even some light fixtures show stains and water from recent rains.
It is possible that some light fixtures have been shorted out due to rainwater entering the
building envelope . Leaks have been ongoing and chronic for some time .
The existing roofing system is a single ply Thermoplastic Olefyn (TPO) membrane
approximately 45 mil in thickness mechanically attached and heat welded at the seams. The
TPO membrane appears to be installed over a mechanically attached 3" polyisocayanurate rigid
board insulation tapered to the back of the building where overflow scuppers allow drainage off
the roof. The perimeter has a 6" to 1' parapet wall where the membrane terminates. The
membrane termination is a fold-over application with aluminum or PVC clad termination bar
underneath. All pipe penetrations are done with TPO cones with metal bands and pitch pockets
are pre-formed TPO clad metal mechanically welded into the field membrane and filled with
pitch pan filler. There are four 1 O to 20 ton BTUs that are roof mounted on curbs and flashed in
with TPO membrane and pre-formed TPO corner patches. HVAC drainage is accomplished with
PVC piping onto the field membrane . Conduit stanchions are adhered to the membrane.
Rooftop gravity vents are also on curbs and flashed in with TPO membrane to the field.
In many areas of the field, the membrane is detaching and allowing water through to the roof
deck and subsequently into the building envelope. There are several reasons why this may be
happening: Either the temperature of the welder used at the time was set too low, the robot
used in the application was set at too fast of a speed, or high winds have worked the membrane
seams to a point where they are detaching. A combination of these issues might also cause the
seams to detach as well. In any case, the problem exists throughout the field.
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As can be seen here, the seams have become corrupted with dirt and grime and would
eliminate the possibility of a re-weld . The seams would need to be cut out and replaced.
In addition to the issues with the field membrane, it should be noted that the membrane
termination at the walls could be done better. Instead of a fold-over design as seen here, a more
preferable installation would have coping cap installed over the parapet wall concealing the
membrane edge and making water tight.
Although this is an accepted way of terminating membrane at the perimeter, care should be
taken by personnel servicing the HVACs to avoid tearing holes in this edge.
Conclusion:
The membrane at this roof is failing at this time. Leaks that are occurring will continue to occur,
get worse and more numerous . The failure could be caused by a single or combination of cool
welding, fast welding and/or high winds working the seams to failure.
Recommendations:
There are three ways to bring this roof back to water tight status: Full replacement, repairing, or
retrofitting.
1. A new roof will be expensive but should give you a 15 to 20 year warranty on material
and 2 year worksmanship warranty. This will entail removing rooftop HVACs after
evacuating Freon and gas (This will require a 60 ft crane since they are located in the
middle of the field), removing old insulation board and membrane, all curbs, cant strips,
pipe boots and pvc piping. Installing new insulation, cant strips, curbs, membrane and
disposing of all trade related material in approved waste sight.
2. A repair would still require removing rooftop BTUs since the detached seams run under
the unit skirt and to the other side of the curb. Then all seams cut out and new strips
welded over the voids left by the cut outs. There can be no warranty on this work since
the existing membrane has weathered to a point where welding would be spotty at best.
3. The best alternative for the City of Anna would be to retrofit the roof with a high solids
silicone coating that would seal in all areas where rain incursion is happening. The
existing membrane will be power washed with an environmentally friendly cleaner to
prepare for coating. Then a white silicone coating up to 25 mil thick will be added
throughout the entire roof system up to and including the top of the parapet walls to
make the whole system monolithic. We have used this alternative with great success on
schools, churches, government buildings and apartment complexes.
Silicone retrofitting would be less than half the cost of new roof, will not require tear off of
membrane and insulation board, removing HVACs or dump fees for old roofing product. It would
cost less in labor and material costs and you will receive 50 year material warranty and 5 year
worksmanship warranty
Bearing this in mind I think the most cost effective, value added solution is to retrofit with high
solids silicone.
Proposal:
1. Power wash all flat roof area including parapet walls, and curbs with cleaner to prepare
for new coating.
2. Coat all flat roof areas with high solids white silicone up to 25 mil thickness
3. Remove trade related debris and leave jobsite clean and under warranty.
4. Material comes with 50 year warranty and workmanship comes with a 5 year warranty
with options to extend for a further 5 years at $.OS per square foot. This can be done
every 5 years up to 20 years total.
Benefits of this type of roofing system:
• Comes with a Manufacturer warranty of 50 years on material.
• D & G Quality Roofing gives a 5 year labor warranty. And in addition, every 5 years we can
inspect roof and give another 5 year warranty for a small fee. (.05 cents per sq ft . Up to 20 years.)
• Withstands permanent ponding water .
• This qualifies your roof as a COOL roof system. (many cities have rebates)
• White silicone roof system is a highly reflective material that can contribute up to 7 LEED points
to building efficiency.
• Will reduce air conditioning energy use, in turn A/C will run less thereby extending their life.
• Overall UV reflectivity and radiant barrier of this system brings down utility costs thereby
making this a cost-effective, value-added system that will pay for itself within 7 years.
Total cost:
Tips Discount 14%:
Total:
$28,962.00
$ 4,054.68
$24,907.32
Terms: 1/3 upon signing($ 8,302.44) and remainder upon completion($ 16,604.88)
Total anticipated time to complete: 5 weekdays barring weather or other interruptions
I hope this helps with your decision on how to resolve these leak issues, Chief Jenks. I know it
isn't the best news, but at least we caught it now before mold starts growing in walls and
ceilings and all your electricals start shorting out. If you have any questions, please let me know.
Thanks for your time,
g~H~
Senior Estimator
D & G Quality Roofing, Inc
4305 FM 1187 Ste. I 00
Burleson, Tx.76028
469-446-0563 c
817-568-8300 w
Residential & Commercial Roofing
HUB, WBENC, SBE Certified
•
December 28, 2015
ANNA (CITY OF)
Philip Sanders
111 N. Powell Pkwy
Anna, TX 75409
RE :
Awarded Vendor Contract -D&G Quality Roofing Inc
Contract #2042414, Trades, Labor and Materials-2014
Awarded April 24, 2014 effective through April 28, 2016
TO WHOM IT MAY CONCERN :
4845 US Hwy 271 N, Pittsburg, TX 75686
Tel (866)-413-6574
The lnterlocal Purchasing System (TIPS) verifies that D&G Quality Roofing Inc is an Awarded Vendor for The
lnterlocal Purchasing System {TIPS), and is authorized to perform work under Contract #2042414.
The RS Means line item estimate from D&G Quality Roofing Inc prepared for ANNA (CITY OF) in the amount of
$24,907.32 has been reviewed by TIPS and found to be within the parameters of the awarded contract listed
above . Purchase Order 013954, dated December 28, 2015, has been approved and forwarded to D&G Quality
Roofing Inc for processing.
If you have any questions, you may reach me at (866)-413-6574 or by email to david.mabe@tips-usa.com.
Sincerely,
David Mabe
Coordinator of Construction Contracts