Cambridge

Cambridge is a laminated, two-piece asphalt shingle made by IKO for steep-slope roofing in the United States. It is built on a fiberglass reinforcement with a thick asphalt coating and carries a Class 3 impact resistance rating.

It is made in the Advantage size, so three bundles cover one square (100 square feet). The data sheet is dated 10/2026. Cambridge belongs to IKO's architectural shingle range, and a regional Cambridge Cool Colors Plus product is separate from it.

The shingle has a fiberglass core, FastLock sealant and built-in blue-green algae resistance. FastLock is IKO's proprietary sealant, and the shingle is sized to True Square Advantage.

• Class 3 impact resistance rating
• Full square coverage from three bundles
• Advantage size
• Blue-green algae resistance
• Proprietary FastLock sealant

• Length: 40 7/8 in. (1,038 mm)
• Width: 13 3/4 in. (349 mm)
• Exposure: 5 7/8 in. (149 mm)
• Shingles per square: 60

• Bundles per pallet: 60
• Pallet size: 40 x 53 1/2 in. (102 x 136 cm)
• Shingles per bundle: 20
• Coverage per bundle: 33.3 ft.2 (3.1 m2)
• Coverage per three bundles: 100 ft.2 (9.29 m2)
• Stock number, U.S.: 4261XXX
• XXX is the numerical color code
• Stock number, Canada: 4262XXX

Cambridge is offered in eight colors. The ZIP or postal code lookup on the IKO page filters Cambridge colors by region.

• Dual Black
• Weatherwood
• Charcoal Gray
• Driftwood
• Dual Gray
• Dual Brown
• Earthtone Cedar
• Harvard Slate

• ASTM D3462 and ASTM D3018 product standards
• ASTM D3161 Class F wind resistance
• ASTM D7158 Class H wind resistance
• ASTM E108 / UL 790 Class A fire resistance, when installed over an approved underlayment
• CAN/ULC S107 Class A fire resistance (Canada), when installed over an approved underlayment
• CSA A123.5 product standard (Canada)
• FM 4473 / UL 2218 Class 3 impact resistance
• Miami-Dade County and Florida Building Code High-Velocity Hurricane Zone approvals, which apply only to shingles available in the southeast U.S. market
• Texas Department of Insurance wind details are referenced

Residential property owners can use the Class 3 rating to obtain a residential insurance reduction, if one is available. The rating is tested to FM 4473 and UL 2218 and does not guarantee impact resistance against hail.

The Cambridge limited warranty term is Limited Lifetime, counted from completion of installation for as long as the owner owns the building. Hail damage to Cambridge shingles is outside the limited warranty.

• Limited wind warranty: 110 mph (177 km/h)
• Limited High Wind Warranty upgrade: 130 mph (210 km/h), which requires the High Wind Application
• Limited algae resistance warranty: 10 years (blue-green algae)

• Exposure to the weather: 5 7/8 in.
• Course offsets: 10 inches
• Nails go in the nail line so that they penetrate both shingle layers
• Open metal valleys are used
• Not applied to roof slopes below 2:12
• Slopes from 2:12 to less than 4:12 count as low slope and use the special underlayment requirements in the IKO application instructions
• Standard application: 4 nails per shingle
• Steep slope applications: 6 nails per shingle
• Excessive roofing cement can cause blistering
• Fire resistance ratings apply over an approved underlayment

IKO lists these accessories with Cambridge:

• EdgeSeal, for a stronger bond along drip edges
• IKO GoldSeam roof sealing tape, for vulnerable areas
• Stormtite synthetic underlayment
• IKO StormShield ice and water protector