Current through September 24, 2024
THE POLICY
In an attempt to alleviate various problems regarding
low-sloping roofs and to standardize plans and specifications, the Bureau as
the Owner has set forth the following policy for roofing new and existing
buildings. The following guidelines delineate the Bureau's Roofing Policy and
related forms.
Roof Policy Elements
* Roof Requirements
* Roof Guarantee
* Roof Slopes
* Roof Substrate
* Roof Insulation
* Roof Top Equipment
* Flashings
* Roof Planning and Surveying
* Roofing Asbestos Testing
* Roofing Bid Documents
* Quality Assurance
* Prebid Roofing Conference
* Preroofing Conference
* Roof Inspection
* Roof Bond |
A.
ROOF REQUIREMENTS
1. The
following three (3) types of roofing systems are approved. Any other type of
roof system must have written approval from the Owner:
a. A four-ply fiberglass and bitumen
hot-mopped applied built-up roofing system.
b. A modified bitumen roofing system shall be
hot-mopped applied.
c. A single-ply
polymeric roofing system including EPDM (ethylene propylene diene monomer); SPE
(chlorosulfonated polyethylene); and CPA (copolymer alloy) can be loose laid,
adhered or mechanically attached.
2. It shall be the responsibility of the
Professional to choose the type of roof which will best suit the Project and to
specify that the roof be furnished, installed and guaranteed as a system which
may include vapor retarders, insulation, fasteners, bitumen, felts, membranes,
flashings and/or other items which are required by the proposed design. All
materials used in the roofing system shall be specified to meet the latest
available American Standards of Testing Materials (ASTM) for individual
components of the roofing system. Certification from the roofing Manufacturer
shall be furnished at the pre-roofing conference as well as when the material
is delivered to the job site.
B.
ROOF GUARANTEE
1. The four-ply built-up roof system and the
modified bitumen system shall have a twenty (20) year unlimited Manufacturer's
guarantee for water tightness covering material and Workmanship on the entire
system.
2. The single-ply
polymeric system shall have a fifteen (15) year unlimited Manufacturer's
guarantee for water tightness covering material and Workmanship on the entire
system.
3. In addition to the
above guarantee, the General Contractor and/or the Roofing Contractor shall
provide a written guarantee agreeing to keep the roof free of leaks for a
period of two (2) years beginning at the time of acceptance of the Project by
the Owner.
C.
ROOF SLOPES
1. All roof
construction on new buildings shall have a built-in minimum slope to drains or
eaves of a quarter of an inch (1/4") per foot.
2. All replacement roofs shall have a minimum
slope of a quarter of an inch (1/4") per foot where feasible, however in no
case shall the slope be less than one sixteenth of an inch (1/16") per foot.
D.
ROOF
SUBSTRATE
1. The type roof system
selected shall be compatible with the substrate and shall be approved by the
roofing material Manufacturer.
E.
ROOF INSULATION
1. Roof insulation shall be of the type
approved and guaranteed by the roofing Manufacturer for the roof assembly in
which it is to be used. The required minimum "R" value shall be specified.
2. On replacement roof projects
which do no have a sloping deck, tapered insulation shall be used where
feasible.
F.
ROOF
TOP EQUIPMENT
1. On all new
construction, the installation of equipment on roofs shall not be permitted.
Where equipment must be installed on a roof, such as kitchen exhaust hood, it
shall be approved by the Owner and shall be installed in accordance with the
National Roofing Contractors Association (NRCA) design details which shall be
such that reroofing can be easily accomplished without the removal of the
equipment.
2. Where equipment must
be periodically serviced, easy access and traffic pads shall be provided.
G.
FLASHINGS
1. Flashings shall be
included in the Roof Warranty and shall be applied by an applicator approved by
the Manufacturer of the roofing material.
2. In reroofing projects existing metal
flashings which are not to be replaced may be exempted from the Warranty.
H.
ROOF PLANNING
AND SURVEYING
1. A report shall be
prepared by the Professional which shall include the following items:
a. New Construction
(1) Fire Code protection requirement and the
required hourly fire resistance rating of the assembly
(2) UL roof assembly number
(3) Type of roofing and flashing system
recommended with justification for its use
(4) Roof Area
(5) Cost Estimate
b. Existing Construction
(1) Determination of roof construction (core
where necessary)
(2) Asbestos
survey and testing
(3) Visual roof
analysis inspection
(4) Moisture
analysis
(5) Code requirements (UL
roof assembly number, if applicable)
(6) Provide Class A type roof, or match
existing roof
(7) Recommendations
by the Professional as to repair or reroof
(8) Cost Estimate
c. The necessary forms to complete the roof
analysis and inspection are included in Appendix 400.
2. Two (2) copies of this report
will be submitted to the Bureau.
I.
ROOFING ASBESTOS TESTING
1. All testing should be conducted and
performed as stated in the ACM Abatement Policy. [See
Section 400.4.]
J.
ROOFING BID DOCUMENTS
1. For new construction and complete tear-off
of existing roofs, the Professional shall specify in the Bid Documents the roof
as a system and shall include all items which are to be covered under the Roof
Warranty.
2. When required, the
Professional shall state in the Section, Instructions to
Bidders, that upon award of Contract the General Contractor and/or
Roofing Contractor shall provide the Owner with the installed price of the
roofing system. If more than one (1) building is involved, each building shall
be listed separately.
3. Items to
be included/stated in Bid Documents:
a.
Prebid Conference: This conference is to be set at least seven (7) days prior
to the bid opening. The date is to be stated in the specifications.
b. Installer Submittals: Within five (5) days
after bids have been opened, the low Bidder shall provide the Bureau with a
letter from the Manufacturer of the roofing system stating that the low Bidder
is an authorized installer. The letter should also list three (3) projects
installed by the low Bidder's firm which used the type roofing specified in the
Bid Documents. The Roofing Contractor shall also provide a sample copy of the
Manufacturer's Roof Warranty.
c.
Roofing Manufacturer: The Bidder is to state the name of the Manufacturer of
the roofing system to be install.
4. Removal of ACM will be a part of the
Contract and must be incorporated into the Bid Documents. [See Section
400.]
K.
QUALITY ASSURANCE
1. The Roofing
Contractor shall have been in business not less than five (5) years.
2. Within five (5) days after bids have been
received, the low bidder shall provide the Owner with the following
information:
a. A letter from the Roofing
Manufacturer stating that the bidder is an authorized installer.
b. A sample copy of the Manufacturer's
Warranty for the specified roofing system. A list of three (3) projects
installed by his firm which used the type of roofing system specified.
L.
PREBID ROOFING CONFERENCE
1. At
least seven (7) days prior to bidding of a reroofing project, a prebid
conference shall be held at the Project site. Attendance is not a prerequisite
for bidding; however, it is strongly recommended.
M.
PREROOFING CONFERENCE
1. On new and reroofing projects, prior to
ordering roofing materials, a preroofing conference shall be initiated by the
Professional.
2. At such time, the
Roofing Contractor shall provide a list of materials to be used, Manufacturer's
installation instructions as well as the Manufacturer's certification
confirming that the materials to be used on the Project meet the specified
American Standard Testing Materials [ASTM] Standards and a statement that the
materials can be warranted by the Roofing Manufacturer.
3. On reroofing projects, the following
personnel shall be in attendance:
a.
Professional
b. Owner's Staff
Inspector
c. Using Agency's
Representative
d. Roofing
Contractor
e. Roofing
Manufacturer's Representative
4. On new roofing projects, the following
personnel shall be in attendance:
a.
Professional
b. Owner's Staff
Inspector
c. Using Agency's
Representative
d. Roofing
Manufacturer's Representative
e.
General Contractor
f. Roofing
Contractor
g. Deck Contractor
h. Mechanical Contractor
N.
ROOF INSPECTION
1. Inspections
shall be made by the Manufacturer's technical representative, as necessary, to
obtain the Roof Guarantee.
2. The
Professional, or Representative, shall inspect the roof as the Work progresses.
In particular, inspections shall be at the following times and followed by a
letter of confirmation:
a. Inspect the
substrate before any roofing is done.
b. Inspect at the beginning of roofing
installation to assure the approved materials are being properly installed.
c. Inspect, as necessary, the Work
as it progresses, or when a problem arises.
d. Inspection at the completion of the Work
in order to give final acceptance of the Project.
O.
ROOF BOND
1. The Professional shall submit to the Owner
the original Roof Bond and include all Close-out Documents.
2. The Bond will be in the name of the Bureau
of Building, Grounds and Real Property Management acting on behalf of the State
of Mississippi as the Owner.