Eave Protection & Underlayment (Architectural Metal Roofing)

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Eave Protection & Underlayment (Architectural Metal Roofing)

Revision as of 17:34, 6 September 2016 by James Klassen (talk | contribs)
For reference, consult the RoofStar Guarantee Standards for ASM Roof Systems eave protection, underlayment and valleys.

Eave protection is used to protect the eave and valley areas of water-shedding roofs from ice dam damage. An ice dam usually forms when the interior heat of the building warms the snow on the roof, causing it to melt and run down to the eaves. Normally, eaves extend past the exterior face of the building and are not heated from the inside. This allows the water to freeze and form an ice dam. As the ice dam grows, it forms a barrier that prevents water from draining off the edge of the eaves. The water backs up behind the dam and gradually forces its way under the primary roof covering (asphalt shingles, metal panels, cedar shakes or shingles, etc.), where it warms and melts (the result of heat leakage through discontinuities in the air barrier system). Liquid water then leaks through the roof deck and into the structure. The results can range from minor staining to severe water damage to the structural members.

Eave protection membranes are designed to prevent the water from reaching the deck and leaking into the structure. These materials are self-adhering and manufactured with a rubberized asphaltic compound, or with butyl. Properly formulated and installed, these sheets have the potential to perform a long time. Slope and climate conditions are considerations for selection; refer to the Standard for further information and guidance.

Underlayment is used in the field areas of the roof (where eave protection is not required) to provide a secondary protection beneath the roof covering, during weather events that might force water underneath.


Notice to Reader
* Eave and Valley Protection - Some of the materials listed in the columns for eave or valley protection must be installed in multiple layers because, by themselves, they are too thin to satisfy the material requirements published in the Standard for Architectural Sheet Metal (ASM) Roof Systems. Consult the product manufacturer for appropriate application requirements, and the Standard for multiple layering requirements. If multi-layering is not permitted by the manufacturer, select a product with suitable thickness that may be applied in a single layer.
Underlayment - While some materials listed as underlayments are nail-applied, their acceptability is dependent on roof slope. Refer to Part 8 in the Standard for Architectural Sheet Metal (ASM) Roof Systems before specifying or installing nail-applied materials; nail-applied underlayments are not permitted on slopes less than 1:3 (4" in 12").

Manufacturer Product Name Product Type Top Surface Separation
Layer
Eaves &
Valleys*
Under-
layment
Nominal Thickness
mm (mil)
Application Method
Click up/down arrows to sort
Various No. 30 Asphalt Felt Felt underlayment Non-woven Felt X X Nail-applied
Building Products of Canada Corp. Gripgard SBS-modified Bituminous X Self-adhering
Building Products of Canada Corp. Weathertex (SA) SBS-modified Bituminous Sanded X 1.5 (60) Self-adhering
CertainTeed LLC DiamondDeck Polymeric Synthetic Polymer X N/A Nail-applied
CertainTeed LLC RoofRunner AIR Polymeric Synthetic Polymer X 0.56 (22) Nail-applied
CertainTeed LLC WinterGuard Pro SBS Modified Bituminous Synthetic Polymer 1.14 (45) Self-adhering
Elevate (fomerly Firestone) Clad-Gard SA SBS-modified Bituminous Woven Polyethylene 1.00 (40) Self-adhering
Elevate (fomerly Firestone) Clad-Gard MA SBS-modified Bituminous X N/A Self-adhering
FT Synthetics PLATINUM Polymeric Polyolefin X 0.50 (20) Nail-applied
FT Synthetics SILVER Polymeric Polyolefin X 0.30 (12) Nail-applied
FT Synthetics PLATINUM HT-SA Polymeric GRIPSPOT TM 1.04 (41) Self-adhering
FT Synthetics Platinum HT-B Polymeric GRIPSPOT TM * 1.04 (41) Self-adhering
FT Synthetics Cobalt Ultra Polymeric GRIPSPOT TM 1.04 (41) Self-adhering
GAF Canada ULC Stormguard SBS-modified Bituminous X 1.02 (40) Self-adhering
GAF Canada ULC Deck Armor Polymeric X Nail-applied
GAF Canada ULC FeltBuster Polymeric non-slip X Nail-applied
Garland Canada Inc. R-Mer Seal polymer/rubberized asphalt adhesive Slip-resist. Polymer 1.14 (45) Self-adhering
Garland Canada Inc. Viking UDL Metal polymer/rubberized asphalt adhesive Polyester 1.52 (60) Self-adhering
HAL Industries Inc. “Super” Tilemate G100 FW SBS-modified Bituminous Woven Polypropylene 1.00 (40) Self-adhering
Henry Company Canada Blueskin PE 200 HT SBS-modified Bituminous Polyethylene 1.00 (40) Self-adhering
Henry Company Canada Blueskin RF 200 SBS-modified Bituminous Slip-resistant Film 1.00 (40) Self-adhering
Henry Company Canada Eaveguard SBS-modified Bituminous Sanded X 1.30 (50) Self-adhering
IKO Industries Ltd. Stormshield Ice and Water Protector SBS-modified Bituminous Sanded X 1.08 (43) Self-adhering
IKO Industries Ltd. 44 Stormshield Ice and Water Protector SBS-modified Bituminous Sanded X 1.08 (43) Self-adhering
IKO Industries Ltd. Armourgard Ice and Water Protector SBS-modified Bituminous Sanded X 1.4 (53) Self-adhering
KPNE Products Ltd. ULTRASeal SA HT Polymeric/Self-adhering butyl Slip-resist. polymer X 1.14 (45) Self-adhering
Malarkey Roofing Products Right Start™ UDL SBS-modified Bituminous Sanded X X 1.40 (55) Nail-applied
Malarkey Roofing Products Arctic Seal Ice & Water Guard SBS-modified Bituminous Sanded X X 1.52 (60) Self-adhering
Malarkey Roofing Products Secure Start Plus Polymeric Slip-resist. polymer X Nail-applied
Malarkey Roofing Products Secure Start SG Polymeric Smooth polymeric X Nail-applied
Malarkey Roofing Products Secure Start Permeable Polymeric Polymeric X Nail-applied
Owens Corning Canada LP Titanium UDL 25 Polymeric Synthetic (not stated) X 0.38 (15) Nail-applied
Owens Corning Canada LP Titanium UDL 30 Polymeric Synthetic (not stated) X 0.63 (25) Nail-applied
Owens Corning Canada LP Titanium UDL 50 Polymeric Synthetic (not stated) X 0.75 (30) Nail-applied
Owens Corning Canada LP Titanium PSU 30 SBS-modified Bituminous Synthetic Polymer 1.10 (45) Self-adhering
Owens Corning Canada LP RhinoRoof U20 Polymeric Not Stated X X 0.18 (7) Nail-applied
Polyglass USA, Inc. Polystick MTS Proprietary Compound Fibreglass mat X 1.50 (60) Self-adhering
Protecto Wrap Company Jiffy Seal Ice and Water Guard HT SBS-modified Bituminous Woven polyolefin 1.00 (40) Self-adhering
Protecto Wrap Company Jiffy Seal Butyl Ice and Water Guard HT SBS-modified Bituminous Woven polyolefin 0.75 (30) Self-adhering
Sentry Building Innovations Roofnado AnchorDeck Polymeric Not Stated X Nail-applied
Sentry Building Innovations Roofnado LapLock PSU (HT) Polymeric/Self-adhered underside Polymeric Self-adhering
Sentry Building Innovations StormTread XW Polymeric Not Stated X Nail-applied
Sentry Building Innovations Sahara (underlayment) Polymeric Not Stated X Nail-applied
Sentry Building Innovations Sahara AnchorDeck (underlayment) Polymeric Not Stated X Nail-applied
Siplast Paradiene 20 EG SA SBS-modified Bituminous Not Stated X 3.00 (118) Self-adhering
Soprema Inc. Lastobond 195 SBS-modified Bituminous Sanded X 1.60 (63) Self-adhering
Soprema Inc. Lastobond 240 SBS-modified Bituminous Sanded X 1.60 (63) Self-adhering
Soprema Inc. Lastobond Shield SBS-modified Bituminous Woven polyethylene 1.00 (40) Self-adhering
Soprema Inc. Lastobond Shield HT SBS-modified Bituminous Woven polyethylene 1.00 (40) Self-adhering
Soprema Inc. Sopraseal Stick 1100 T SBS-modified Bituminous Woven polyethylene 1.00 (40) Self-adhering
Soprema Inc. Sopraply Stick Duo SBS-modified Bituminous Sanded X 3.00 (120) Self-adhering
Soprema Inc. Lastobond Stick VP SBS-modified Bituminous Trilaminar polypropylene X 0.6 (24) Self-adhering
VaproShield LLC SlopeShield Plus Self-Adhered Polymeric Trilaminar polypropylene X 0.51 (20) Self-adhering


Accepted Materials


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