CertainTeed Landmark Pro and Owens Corning Duration are closely matched in price and quality for a Florida reroof. Landmark Pro is slightly heavier, which can be a sensible tie-breaker when the rest of the roofing scope is equal.
That comparison becomes more involved on a 35-year-old home with 13 gables, a 7/12 roof pitch, two attic spaces, a large existing gable vent, and soffit intake. On a roof like this, the shingle is only one part of the decision. Underlayment, ridge venting, intake, and possible concealed wood repairs all need a clear scope.
Landmark Pro and Duration have a small gap
Landmark Pro and Duration were characterized as very similar products with a very similar price. Landmark Pro is a little heavier. If two proposals have comparable materials, ventilation work, and repair pricing, that added weight may favor Landmark Pro.
Some roofers work with Owens Corning products, while others use CertainTeed products. Both manufacturers offer multiple product tiers. Compare the full material list rather than assuming that every underlayment paired with a shingle brand is equivalent.
Name the underlayment and peel-and-stick scope
Breathable synthetic felt was identified as a common underlayment choice. A water-resistant liner and peel-and-stick material were also raised as possible products in a reroof scope. Those terms should not be treated as interchangeable: the proposal should name the actual underlayment product and separately state where, if anywhere, peel-and-stick material will be installed.
The concern about vapor was that a more water-resistant product might prevent vapor from escaping. Breathable underlayments were described as common, and paying more for a different underlayment was not presented as automatically worthwhile. The useful comparison is the specific product and installation area listed in each proposal.
Sixty to 70 feet of ridge vent needs a roof-specific plan
Ridge venting can be efficient in Florida because heat collects near the roof peak. It is not, however, a stand-alone change. Adding ridge vent also requires adequate intake, and additional intake options may be needed when soffit intake is insufficient.
Replacing 60 to 70 feet of ridge with venting while leaving a large gable vent open raises an intake-and-exhaust question that needs calculation. The two attic spaces and 13 gables make a roof-specific ventilation layout especially important.
Keep the key scope items together when comparing proposals: the named underlayment, any peel-and-stick locations, ridge-vent length, intake work, ventilation calculations, and stated pricing for potential wood repairs.
Set expectations for hidden wood conditions
Decking and related wood conditions can be difficult to see until shingles are removed. A 35-year-old home without active leaks may not have rot, but deterioration can appear around fascia, drip edge, flashing, or other concealed areas.
Ask for stated pricing or a defined method for handling possible wood work after tear-off. That makes it easier to evaluate potential work such as decking repairs or fascia replacement without leaving all added costs undefined.
Choose the more complete roofing scope
If Landmark Pro and Duration proposals match on the named underlayment, ventilation design, intake work, and potential wood-repair pricing, Landmark Pro's slightly heavier construction can break the tie. If those scope details differ, resolve them before focusing on a small difference between shingle prices.
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Source: Home Owner Morning Brew Show: Whats the best Roofing shingle in Florida?
FAQ
Is CertainTeed Landmark Pro better than Owens Corning Duration?
The products are closely matched in price and quality. Landmark Pro is slightly heavier, which can be a deciding preference when the underlayment, ventilation work, and repair terms are otherwise comparable.
Should a Florida reroof use breathable synthetic felt or peel-and-stick material?
Breathable synthetic felt was identified as a common underlayment. Peel-and-stick material should be listed separately by product and installation location because it is not simply another name for synthetic felt or a general water-resistant liner.
Can ridge vent be added when a roof already has a large gable vent?
It may be possible, but ridge exhaust and intake need to be calculated together. A roof with 60 to 70 feet of potential ridge vent, a large gable vent, two attic spaces, and many gables needs a roof-specific ventilation plan.
What should a reroof proposal say about ventilation?
It should identify the ridge-vent length, the intake work, and the calculations supporting the intake-and-exhaust arrangement. This is particularly important when the roof has separate attic spaces or existing gable venting.
How should a reroof proposal handle wood damage found after tear-off?
Concealed decking, fascia, drip-edge, or flashing-related wood conditions may not be visible before shingles are removed. Request stated pricing or a defined process for potential wood work so added costs are clearer if repairs are needed.
