Quote Originally Posted by Papajamba View Post
Gusto ko rin sana asphalt shingles kasi maganda tingnan but nung nalaman ko na poor performance pala sya sa hot climates, metal long span na lang pinalagay namin.


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Shingles poor in the tropics? Where did you hear that, sir? They don't corrode & when installed to factory specs, they hold the factory material warranty assigned to that particular variant, 20/30/50years....
I've seen metal roofs suffer way more typhoon damage than properly applied asphalt shingles. These are the reasons why top tropical resorts specify them.
Again, key here is to strictly follow the minimum roof slope, the proper underlay material & thickness, the proper moisture barrier, & the correct proportion of ridge ventilation. Improper install, cost/short-cutting may have given this type of roofing the false negative impression.
Amongst the available notable brands we've tried, IKO from North America has been the most consistent. Guess, them being the lone vertical roofing & waterproofing conglomerate got its pluses. Even IKO's granules are produced in-house. Owens & Certainteed outsource their raw materials from 3M & other companies. Some of their lines come from different plants, too. Consistency of batches over time come into play when the roofing will require sectional repairs or overlay.
Where metal roofs have the advantage over shingles? The latter requires a high minimum slope of 15°. Shingles can't do flat roofs. And, where you have a secondary & lower shingled roof, avoid it used as a relay to heavy water volume from roof valleys above them to avoid visible wear patches long term. Those said valleys above lower roofs, we normally apply selective sectional welded stainless gutters.
Roofing material choice(shingles/tiles/metal) is usually dictated by application, design intention & cost. When properly done, all these can perform to expectations.


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