Why use a metal roof?
Few will argue that a metal roof, when installed properly, adds a certain design element to a building. Metal roofing led the way by turning a traditionally bland, boring part of the building into a feature worth highlighting.
In reality, the metal panels simply “shed” water away from your roof - they are not watertight.
Water can find its ways under metal panels. To prevent water infiltration, metal systems generally have to install a water barrier membrane under the panels and around penetrations.
Essentially, this forces you to purchase two separate systems - one for looks and one for protecting against water.
PVC Roofing Is a Watertight Alternative
Sika's Décor Roof System uses the proven Sarnafil G 410 thermoplastic vinyl membrane, a time-tested product that has proved its ability to withstand weather extremes in all climates around the world.
The G 410 membrane is hot-air welded to produce watertight seams that are even stronger than the membrane itself. And where penetrations and detailing are a common source of leakage on metal roofs, Décor's hot-air welded flashings remain watertight.
However, that statement refers to the metal panels themselves. Those roofs haven't necessarily kept water out of the building for hundreds of years.
And with so many options to choose from in metal thickness, corrosion coatings and paint types - on steel or aluminum panels - this old perception is no longer the reality.
Various levels of metal panel performance are available, and premature rusting and paint peeling are real possibilities if the wrong level is chosen.
If Performance is Mandatory - Think PVC
Manufacturing high-quality roofing systems for over 50 years, Sika has more experience than any other North American thermoplastic membrane manufacturer. Our roofs have proved their worth consistently, again and again, regardless of climate.
Decor's Sarnafil membrane offers a long-lasting solution that does not rust or corrode. In addition, you'll get the peace of mind of watertight integrity with hot-air welded seams and permanent watertight flashing and detailing.
How Difficult is it to flash details on a metal roof?
Simply put, flashing details with metal is hard. It is a difficult material to bend, form and cut. On simple, straightforward buildings with few to no areas requiring metal to be flashed, metal panels can be a cost-effective solution.
Unfortunately, many of today's buildings have numerous areas that need to be flashed, such as roofline transitions, penetrations, valleys and dormers.
Flashing metal is labor intensive, difficult to keep watertight and requires an additional waterproofing layer in these critical areas, adding to the system cost.
Caulking can help keep the water out in some areas, but it will eventually break down over time due to the elements and constant expanding and contracting of the metal.
In other words, it requires constant maintenance.
Save Time and Money with PVC
Decor's Sarnafil membrane is flexible and easy to work with, which makes flashing a breeze. Because the seams are hot-air welded to maintain watertight integrity, an additional waterproofing layer is not necessary. All of these add up to labor and material savings.
Take Your Roof to the next Level with Sika Sarnafil
Décor Roof Systems deliver...
Aesthetics - the beauty of a metal roof, but the watertight integrity of a hot-air welded membrane
Design Flexibility - express your creativity as never before - regardless of roof slope, shape or complexity
Proven Performance - Sarnafil membranes span more than 50 years of delivering long-lasting, proven performance around the world
Low Life-Cycle Costs - minimal maintenance requirements and exceptional system longevity drive costs down
Request a Décor Sample Kit
To learn more about the Sarnafil Décor Roof System or to request a Décor Sample Kit, please call 800-576-2368.