A. Follow shingle manufacturer's recommendations for acceptable roof
deck material
B. Broom clean deck surfaces under eave protection and underlayment
prior to their application
3.3. INSTALLATION — EAVE ICE DAM PROTECTION
A. Place eave edge and gable metal edge flashing tight with fascia boards.
Weather-lap joints 2 inches (50mm). Secure flange with nails spaced 8 inches (200
mm) on center.
B. Apply CertainTeed “WinterGuard” Waterproofing Shingle Underlayment as
eave protection in accordance with manufacturer’s instructions.
**NOTE** Change dimensions below to 48 inches (1220 mm) or greater for low slope roofs or
severe climatic conditions.
C. Extend eave protection membrane minimum 24 inches (640 mm) up slope
beyond interior face of exterior wall.
3.4. INSTALLATION — PROTECTIVE UNDERLAYMENT
**NOTE* Delete first three paragraphs below if all roof slopes are greater than 4:12 Otherwise,
select either complete WinterGuard underlayment, Roofers Select, Diamond Deck or D4869
underlayment in combination with eave ice damn protection.
A. Roof Slopes between 2:12 and 4:12: Apply one layer of “WinterGuard” over
all areas not protected by WinterGuard at eaves, with end and edges weather
lapped minimum of 19 inches (480 mm) Stagger end laps each consecutive
layer. Nail in place
B. Roof Slopes between 2:12 and 4:12: Apply two layers of Roofer’s Select or
D4869 underlayment over areas not protected my WinterGuard at eaves, with
ends and edges weather-lapped 19 inches (480 mm) .Stagger end laps each
consecutive layer. Nail in place.
C. Roof Slopes between 2:12 and 4:12 — Use of Diamond Deck Synthetic
Roofing Underlayment. Follow manufacturer's printed instructions for low
slope application of this product. Do not use staples on this product.
D. Roof Slopes 4:12 or Greater: Install one layer of asphalt felt shingle
underlayment perpendicular to slope of roof and lap minimum 4 inches (100
mm) over eave protection.
E. Weather-lap and seal watertight with asphalt roofing cement items projecting
through or mounted on roof. Avoid contact or solvent-based cements with
WinterGuard and Diamond Deck
3.5. INSTALLATION — VALLEY PROTECTION
A. For “closed-cut,” “woven,” and “open” valleys, first place one ply of
WinterGuard, minimum 36 inches (910 mm) wide, centered over valleys. Lap
joints minimum of 6 inches (152 mm) Follow instructions of shingle an
waterproofing membrane manufacturer.
3.6 INSTALLATON — METAL FLASHING
A. Weather-lap joints minimum 2 inches (50 mm).
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