Radiant Heat Barrier HeatBLOC Systems (Residential & Commercial)
Much like the foil faced radiant barrier roof decking used in new construction, HeatBloc-ULTRA is a metallic spray on coating that is applied on the attic side of your roof decking. It is comprised of a water-based mixture that when installed offers low emissivity or (Low-E). It is a great cost effective solution for existing homes that can reduce your heating and cooling costs significantly. Oftentimes, HeatBloc Ultra is the only radiant barrier solution that can be applied safely and effectively in enclosed areas.
Testing has shown that HeatBloc Ultra provides some of the best e-factors reported, outperforming every spray on radiant barrier competitor at .19. In addition, it reflects up to 81 percent of the radiant heat attempting to infiltrate buildings and homes.
Heatbloc And Roofing Shingles – What are the effects?
Most shingle manufacturers have come to the conclusion that there are virtually no negative affects on roofing shingles and installation of radiant barrier systems will not void the warranty on your shingles. It is still recommended to contact the shingle manufacturer to check their requirements and confirm that doing this type of home improvement will not affect your warranty in any way. You can read more info here: PDF Report.
In order to get the full performance value out of a green roofing material such as HeatBloc-ULTRA, it should be applied per the manufacturer specs. Solid, even coats should be applied to all non-insulated surfaces including gable end walls. This will ensure that the proper radiant barrier is in place reflecting up to 81% of the radiant heat getting into the attic space.
Reducing the heat load in the attic space has a two-fold effect on the HVAC system. Heatbloc Ultra reduces the amount of heat entering the conditioned space which reduces the amount of work the HVAC system has to do to constantly keep the desired temperature inside. In addition to that, since all the HVAC ducting is in the attic, it will reduce the heat load on the air conditioning ducts within the attic making it easier for the system to supply cool air.
Benefits & Features of HeatBLOC Radiant Barrier Coatings:
- Highly Reflective, Low-E (Low Emissivity) technology.
- Good Permeability, will not trap moisture in the wood.
- Can be easily applied with a sprayer or rolled on like paint.
- Will not interfere with cell phones or electrical signals includingTV antenna’s.
- Adds efficiency to your existing insulation.
- Least invasive and most economical approach to remodeling with a radiant barrier system.
- Will increase value of your home or building.
We Install Blown-In Insulation
In addition to installing radiant barrier systems, we can also add blown in insulation to your home for improved energy efficiency. Call for more details. We will meet at your home to evaluate and assess your needs and provide a free quote for installation of both HeatBLOC and insulation.
What is HeatBLOC?
HeatBLOC is a sprayed on metallic, water-based coating with Low-E (Low emissivity) properties. Once properly applied to certain materials such as oriented strand board (OSB), plywood, or other roof decking materials, HeatBLOC reduces the material’s emissivity on the surface to approximately .25 or less. This essentially stops over seventy-five percent of the radiant heat attempting to infiltrate the home. This product has been classified by ASTM as an IRCC or (Interior Radiation Control Coating).
How Does HeatBLOC Radiant Barrier Work?
Because certain building materials like brick, wood, and sheet rock have higher surface emissivity ratings around .7 to .95, they tend to pass this radiant heat to the cooler surfaces penetrating the roof deck and attic spaces. HeatBLOC radiant barrier systems work by lowering this emissivity (to below .23) on the surface, therefore transferring less heat through other materials.
What is a radiant barrier?
There are 3 ways for heat to penetrate a building enclosure: radiation, conduction and convection. Radiant barriers address the radiant heat transferred by electromagnetic waves, a process known as thermal radiation. Thermal radiation is an invisible form of light that moves through air spaces from a hotter surface to a cooler surface. Hotter surfaces like your roof decking radiate heat into the attic space which is cooler and eventually into the building. A radiant heat barrier reflects this heat back to the outside of the house keeping the inside much cooler.
What is Emissivity?
Emissivity in a nutshell, is a surface’s ability to transfer or emit heat energy that comes in the form of electromagnetic radiation (long wave). This is measured by giving it a value of 0-1. The less effective a surface is at stopping heat from being transferred the higher this number will be. For example, most wood surfaces have an emissivity rating of around .90 Therefore, when wood get hotter than the other surfaces around it, it has the tendency to transfer approximately 90% of that heat energy via radiation. By applying HeatBLOC to non-porous surfaces, it decreases the emissivity of the surface to around .25 sometimes less. This in turn reflects about 25 percent of the heat energy.
What is the lifespan of HeatBLOC? Will it degrade over time?
One of the many benefits of HeatBLOC is that it has no loss of effectiveness as it ages like many other materials. Foil faced materials can tear and foil chip products tend to collect dust reducing the effectiveness of the product. With HeatBLOC, as long as the surface it is applied to remains in good shape and is free of obstructions, it will only need to be applied one time!
Do radiant barriers prevent heat loss?
Radiant barriers are mainly designed to reflect heat out. However, there have been studies done at the University of Kansas that reported up to a 15 percent reduction in the heat that is lost through the attic space when radiant heat barriers were in use.
What is the recommended coverage rate for HeatBLOC Ultra?
Depending on how porous the surface of the substrate is, around 325 to 50 sq. ft. of coverage is recommended for the application of HeatBLOC Ultra.
Can HeatBLOC be applied to walls?
Yes. Since most of the heat gain or loss it through the roof, it is more effective in those areas. However, it can be applied to wall surfaces as long as there is at least 3/4″ air space between the HeatBLOC material and any other material (ie. insulation)
Can HeatBLOC be used in “vent-skin” type construction?
Yes. With this type of roof construction, HeatBloc Ultra can be applied to the bottom side of the outermost skin facing downwards into the vent channel. Sidewall applications it should be installed on the inside, again facing the vent channel.
Can HeatBLOC be used with radiant heating systems?
Yes. When installed behind wood stoves or on wall surfaces that are next to ceiling mounted radiant heating systems, it reflects heat very well.
Is it important to have good attic ventilation?
Yes. Radiant barrier systems work independently by controlling the radiant heat load. However, a well ventilated attic will help in controlling the convective heat. Making use of good ventilation with a radiant heat barrier will only improve heating and cooling costs.
Do radiant barriers have an “R” value?
No. An R-value is only given to insulating systems and solid type insulation materials that help stop the other forms of heat transfer. However, testing has shown that HeatBLOC can help increase the effectiveness of insulation anywhere from 87% – 98% respectively.
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