Eave Protection & Underlayment (Architectural Metal Roofing)
Eave Protection & Underlayment (Architectural Metal Roofing)
- 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 |