HomeMy WebLinkAboutLETTER FROM MANUFACTURERPABRIGATQIRS
CANNED
St Luc eCounty
To Whom It May Concern:
As outlined in the Florida Building Code, Extreme Metal Fabricators, LLC will accept the installation of metal
roofing panels over one layer of shingles or modified roofing, assuming all requirements of Florida Building
Code 5`" Edition (2017) Section 1510 Reroofing, 1510.3 Recovering versus replacement" and/or Florida
Buiding Code a Edition (2017) Residential Section 905.10 and Retooling Section 907" have been met.
It is important to ensure the existing substrate is not deteriorated, there is no entrapped moisture, meets all
code requirements, and to install an approved separator underlayment between the existing roofing and the
metal panels, such as those that comply with ASTM D226 Type I or Type 11 or ASTM D 1970, or ASTM D
4869. The roofing contractor of record must verify the aforementioned requirements. Having confirmed code
requirements, installation in this manner is approved by Extreme Metal Fabricators, LLC as the manufacturer.
Plywood sheathing must be minimum 15/32" CDX plywood or 3/4" wood plank, solid decking, fastened per
FBC requirements. The wood substrate must be inspected to ensure that it has not deteriorated and is
acceptable as a suitable substrate for additional roofing. Fasteners used should penetrate minimum'/4"
through structural decking or a minimum of 1" penetration into a thicker wood substrate, to insure pull-out
values remain the same.
Consideration should be given to the unevenness of the underlying shingles, which may telegraph through the
new metal panels. As in all metal roofing, 'oil canning" is an inherent condition that can occur in the panels.
Care should be taken during the installation, to observe the metal panels as they are installed, and adjust
installation procedures, if possible, to help to minimize "oil canning". "Oil Canning" is an aesthetic issue not a
structural issue, and not a cause for rejection.
The energy savings that is normally observed after a new metal roof replaces the previously shingled roof,
may be negated due to the underlying shingles holding heat energy much longer than a metal panel installed
without shingles beneath it.
It is important to comply with all requirements of the Florida Building Code, Fire Rating requirements, and local
code requirements. As always, authorities having jurisdiction, (building department) should be consulted, and
approve your demolition and reroof installation methods, prior to beginning work.
Extreme Metal Fabricators, LLC
9 21605W Poma Drive Palm City, FL 34990 (772) 872-8034 (Phone) (772)872-8035 (Fax)
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Limitations: FL17O22.1 6V - imp (26GA Steel), 249, Wide Roc _anel - Details
-
1. Undedayment to be compliance with current Florida Building Code (FBC)2017 Weed.
2. Minimum slope Uo be compliant with Florida Building Code 2017 61i ad., and per with Manufacturer's installation reference.
3. Products are compliant for State of Florida product approval per Rule 81G203. Compliance Method: 1-D
4. Engineering analysis for °project specific approval by local authorities 6IG2 -3. Co is allowed by other registered engineers.
5. Fire classification is not part of this acceptance. Shear diaphragm values are outside this report
6. Support framing in compliance w/FBC 2017 6'" ed., Chapter 22 for Steel, Chapter 23 for Wood and Chapter 16 for
Structural Loading.
7. This report does not imply warranty, installation, recommended product use outside of this report
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