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Special Feature: Tile Rooftops



Tile Rooftops

Energy efficiency is another trait not often associated with roof coverings.
The tile roofs create a natural air space that makes them the ideal choice
for use in hot desert climates. The lighter colored tiles dominate the
selections available in areas where reflectivity can have a significant
effect on the heat absorption of roofs. There are also numerous accessories,
such as foil sheets and venting apparatus, which can be incorporated into
a tile installation to enhance air circulation and add to tile's effectiveness
as a heat barrier.
This same air permeability also helps a tile roof resist the wind uplift
forces in severe windstorms and hurricanes. Extensive testing has shown
that tiles can sustain in excess of 140 Mile per hour winds which would
strip off most other materials long before the lOO mph threshold is of
a hurricane is reached..
Tile fastening techniques have proven equally effective in resisting
the destructive forces of major earthquakes as well. In fact, following
the recent Northridge, California in the US and Kobe, Japan earthquakes,
thorough investigations showed that properly installed tile roofs sustained
little or no damage in either quake.
The operative phrase here is "properly installed", because in any major
disaster, such as an earthquake or hurricane, the roof coverings, or entire
structure for that matter, only perform up to expectations if they are
properly installed and constructed.
Since tile roofs have amassed such a fine track record over the years,
it is only natural for the owner of a tile roof to have expectations of
that fine performance when conditions demand it. This is also the desire
of tile manufacturers whose reputation rides on the performance of their
products.
The fact is, based on their individual durability, tile roofs can last
for periods of time that are totally unattainable by any other product
other than slate or stone. The key then, is to match an installation method
that Matches tile's ability to provide long-term protection and serviceability
The National Tile Roof Manufacturers Association (NTRMA) is an organization
of tile manufacturers and their associates who have been working quietly
yet steadily towards improving the standards of application and production
of roof tiles for the past 15 years. Relatively unknown to the general
public, the NTRMA has focused its attention on issues regarding tile performance
and works closely with all related code agencies and research groups dedicated
to improving the standards of the construction industry.
Because building practices evolved differently in America, traditional
methods of tile application as they are applied in other parts of the world,
may not be applicable here. Solid sheeted roof decks, wood frame construction
and specific building codes have made it necessary for tile manufacturers
to pattern their application recommendations after local practices and
product availability. Tile roofs were usually installed using methods and
materials that were already in place, based on whatever material was commonly
being used prior to tile's arrival, and while the resourceful roofer generally
made it work, it rarely resembled the more permanent assemblies that are
the norm in areas with stronger tile traditions.
The NTRMA has recognized that, if tile is to become the dominant roofing
material on the North American continent, attention needs to be paid to
establishing responsible and available guidelines to proper tile application.
Individual members are actively working to identify the best practices
in different regions of operation with the intention of developing standards
for the industry to follow. Efforts are ongoing with local building officials
and roofing associations to determine what constitutes the best roofing
practice in any given area based on climate conditions and local building
practices.
While it is expected that tile roof applications will continue to evolve
with the advent of new product innovation and code changes, there is already
a wealth of information available for interested homeowner's use.
Did you know that manufacturers have come up with a tile that is light weight and is strong enough to stand on it?
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