Cold Sto
orage
e Rooffing
Req
quirements for TPO and P
PVC
Co
ommercia
al
Upd
dated: 03
3/16
Qu
uality You
u Can Tru
ust…
Frrom North
h America
a’s
La
argest Ro
oofing
Ma
anufacturrer!™
www.gaf.com oofing COLD
D STORAGE Ro
Re
equirem
ments f
for TPO
O and PVC (Comm
mercial)) Guarante
ee Coverage FFor TPO and P
PVC Adhered
d Insta
allations Years* TPO and PVC ((New)
20 d 80 mil TPO EvverGuard 60 and
®
EvverGuard Fleece‐‐back 60 and 80 m
mil TPO ®
EvverGuard 60 and
d 80 mil PVC ®
EvverGuard Fleece‐‐back 60 and 80 m
mil PVC ®
EvverGuard Extreme
e 60 and 80 mil T
TPO and PVC XK available ®
*Maximum G
Guarantee Avaailable
The followingg requiremen
nts and restriictions apply: 1.
Availableeforadheredm
membraneroofingsystemss
only.
msonly.Not
2. Availableefornewandttear‐offsystem
availableforrecoversyystems.
umof2layerssofinsulationis
3. Aminimu
required..Thetoplayeerofinsulation
nistobe
adheredaandmaybean
napprovedco
overboard.
4. Standard
dindustryrooffingpracticesmustbe
followed..Buildingenvelopespecificcations
provided
dbythedesign
nerforsealinggofall
penetratiionsandedgesmustbefollo
owed.
5. EverGuarrd®TPOaccessoriesmustb
beusedwith
EverGuarrd®TPOsysteemsonly.
6. EverGuarrdExtreme®TPOaccessoriesmustbe
usedwith
hEverGuardE
Extreme®TPO
Osystemsonly.
7. EverGuarrd®PVCaccesssoriesmustb
beusedwith
EverGuarrd®PVCsysteemsonly.
8. Requiresinspectionaft
fterallworkisscompleted.
9. EverGuarrd®TPO45andPVC50milmembranes
arenotelligibleforcold
dstorageguarrantee
coverage.
10. Foraddittionalinformaationoncoldsstorage
installatio
ons,pleaseco
onsultGAFTecchnical
Services.
GAFF’s guarantee d
does not cover damage resultting from any tthird‐party prooducts or systeems which are attached to orr thru GAF’s EverrGuard® TPO, EEverGuard Extreme® TPO or EverGuard® PV
VC membrane s. See guarantee for complette coverage an
nd restrictions. N
Note: EExtremes in intternal temperaature/humidityy are often asso
ociated with coold storage/freeezer buildingss and food processing plants. W
What makes th
hese building applications unusual is that th
he pronouncedd difference in vapor pressurre between thee building interior and the
e exterior can cause a pronounced vapor fllow through thhe roof assemb
bly. This can reesult in a signifiicant build‐up o
of condensatio
on within the ro
oof assembly, aand severe detterioration of bboth the roof aassembly itselff and the structural deck. R
Relevant design considerations include: 
Attention
n to vapor‐tight seal between
n roof and side
e walls/penetraations; 
Utilization of closed‐cell foam insulatiion and stainle
ess steel fastenners to minimizze potential forr condensation
n related degradatiion of roof systtem; 
Limitation
n of penetratio
ons through ro
oof deck; 
Avoidancce of roof syste
em attachmentt through any vvapor retarderr.