Consult the roofing manufacturer s technical.
Fm roof membrane approval design a.
All roof wall substrates are to be a wood or primed roof board suitable for adhering the roof wall flashings as approved by the roofing system manufacturer.
For all ballasted racking systems where the stands sit on the finished roof membrane provide an additional membrane layer or slip sheet to prevent damage.
Fm approvals work has driven the evolution of many types of roofing systems and certainly has played a big role in the development of the high performance fastening systems we use today.
Until recently the biggest news on the wind design front was the approval of ansi spri fm 4435 es 1 wind design standard for edge systems used with low slope roofing systems let s call it 4435 es 1 for short.
General roofing design criteria.
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Fastener to be fm global approved.
Designed to help roofing professionals roofnav provides easy access to all roofing related information from the fm approvals approval guide and related installation recommendations from relevant fm global property loss prevention data sheets.
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Install wood cants that are not pressure treated against decay around parapet perimeters.
Neither fm approvals nor fm global are building code making bodies but fm approved roofing systems are often specified so it s important that specifiers and designers understand fm approval s role and the wind ratings.
Only mechanically fastened or fully adhered systems should be used.
As stated earlier fm approvals requirements are specified carte blanche by many designers on buildings that are not fm global insured.
Roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most.
Refer to the nrca roofing manual and fm global property loss prevention data sheets.
Roofnav is a complimentary tool from fm approvals that provides access to the most up to date fm approved roofing products and assemblies.
No ballasted systems will be allowed on single ply roof systems.
Which is designed with 23 pounds per square foot of uplift would require an fm approved class 1 60 system design and follow the requirements of data sheet 1 29 for corner and perimeter enhancements.
A common mistake made when these documents are not followed is that roof edge fascias end up being inadequately secured says judd peterson aia president of judd allen group edina minn.
