Thursday, December 18, 2008

Durability of Liquid Roof Coatings

Liquid Roof is a liquid elastometric copolymer rubber coating that has excellent elongation, tensile strength, UV resistance and durability. Cures to a hard white or light gray rubber heat reflecting coating!
The material factors that influence durability are complex and related to the chemical composition of the liquid constituents, the thickness of the system as well as the type and density of the reinforcement. Central to the long-term success of liquid-applied waterproofing systems is preparation of the substrate and achieving the required membrane thickness.
Typically, manufacturers only guarantee their products when applied by approved and trained installers. This is not surprising as standards of application by squeegee, roller, brush or spray are very demanding; layers are measured to tenths of a millimetre and avoidance of air holes is essential. The weather conditions in which the liquid is laid are critical as are the times between application of coats.

Other key durability issues include:

  • Ensuring the substrate construction and condition is free from material which may impair the bond, create thin spots or penetrations in the coating.
  • Provision for moisture removal of damp substrates.
  • Ensuring there are no point loads on the roof.
  • Specifying a system suited to the expected traffic load.
  • Appropriate detailing at edges, verges, upstands, outlets, movement joints and day joints.

Liquid-applied coating that forms the waterproofing layer of an inverted roof should not require replacement during the life of the building, provided it is fully protected from ultra-violet radiation and extreme temperature variations by a loading layer above it.

By increasing the longevity of roof materials by using liquid roof coatings, organizations can avoid a substantial amount of roofing waste. There are an estimated 11 million tons of asphalt roofing waste going into landfills every year. Using liquid roof coatings can greatly increase the life of existing roof materials (particularly roof coatings) and reduce the amount of torn-off roofing waste going into landfills. The roofing waste that remains can be recycled into road mixes using existing processes already operating.

Saturday, December 6, 2008

Make Your Old Roof like a New One

People Use to do a very dump thing when they saw any defect or leakage they go for roof replacement instead of roof repair. There are so many products in the market which given a guarantee of roof leaks repair and other repair. Couple of products are liquid roof and liquid rubber. We can use liquid roof and liquid rubber on the roof. After cleaning the roof if we apply it to the roof we can get our roof as like a new one.
Most people in USA who are coming from the North are surprised by the idea of roof cleaning - and even more surprised by the fact that many communities in Florida require it. Reasons for cleaning include aesthetics, property values, energy efficiency, and increased longevity of the roof.
A quality roof should last upwards of 30 years if cared for and maintained properly. Unfortunately, many roofs here in Florida (and increasingly throughout the US) are subjected to unnecessary stress while cleaning the greatly reduces the life expectancy of the roof. With repeated roof cleaning comes certain pitfalls that every homeowner, property manager, and professional cleaner should be aware of in order to avoid damage to property, unnecessary repair costs, and the premature replacement of the roof.
How Black Roof Can Be Cleaned:
The black stinks on roof mostly found in the areas where moisture settles on shingles.
Typical roof cleaning methods involve either pressure cleaning or chemical solutions containing Chlorine Bleach or Sodium Hydroxide. If used properly, these methods will clean the roof with minimal adverse impact - but the effects can be very temporary and will generally have to be repeated every 6-18 months in order to maintain the appearance of the roof.
Best Cleaning Method:
There are lots of roof cleaning methods with advantages and disadvantages.
A - Pressure cleaning is an option that should only be used on a concrete, barrel tile, or metal roofs.
B - Sodium Hydroxide based cleaners are generally advertised as safer for the landscaping, but sodium hydroxide is caustic, very toxic, and care should also be used to protect employees and surrounding property. Sodium hydroxide is also a very effective degreaser. So high levels of sodium hydroxide in a cleaning product can cause damage to an asphalt shingle roof that can be irreversible.
Well cleaning the roof with these methods are not permanent solution. Roof will need the cleaning in the next year. So if you do cleaning once then you need to maintain it properly so that you can avoid future cleaning of the roof.