Types Of Roofing Insulation

The process of selecting roofing insulation has become a more difficult task

As there are now many different types, qualities on offer. Each and every company will tell you that their insulation is the best, whilst another could possibly claim that theirs is the least expensive, etc. All companies agree however, that roof insulation provides a substantial return on investment. This return though varies from company to company and from building to building. In this article we look at some of the benefits and disadvantages of roof insulation. These may include:

Rigid Versus Conduit Roofing Insulation: Rigid insulation is the type that is commonly placed on homes and businesses. This is where a rigid foam is fitted over the existing roof system. There are a number of benefits to using this type of roofing insulation. The main benefit is that it does provide a degree of protection against heat loss and increase the energy efficiency of the structure.

type of roofing insulation most widely recommended for domestic use


Conduit Roofing Insulation: The workable version of roofing insulation, this form uses a wiper system between two pieces of rigid foam. Again the main benefit is the thermal resistance – with the foam acting as a working platform which slows down or breaks up the transfer of thermal energy to the external environment. If thermal bridging exists then this is an ideal solution. Of course there are other benefits such as thermal resistance. However this is not considered to be significant enough to outweigh the cost of installing the foam.

Spray Coated Roofing Insulation: One of the easiest forms of roofing insulation to install, this method uses a coating of either silica or aluminum. As with rigid insulation, this forms a protective shield against heat transfer. The difference lies in the fact that the silica coating is applied to both the flat roof surface and the rafters. On the other hand, aluminum is only sprayed on the roof surface. Spray coating is commonly used for insulating roofs in the hot tropical regions. However, it was originally developed for use in space shuttles.

Direct Water Insulation: This is the most effective form of insulation as the board contains vapor pockets. These are so small that direct water contact is impossible. These types of insulations have the added benefit of being able to withstand extreme temperatures of up to minus forty degrees Celsius. Also they can withstand direct liquid pressures as high as four feet, while rigid insulation boards can only withstand pressures of up to twenty-five pounds per square foot. This particular insulation can also withstand freezing and thawing temperatures of up to minus four degrees Celsius.

Xps Insulation: The most common form of insulation found today is extruded polystyrene. It is comprised of twelve tiny beads that are interconnected by six wires that form a liquid. The tiny beads are sprayed onto the roof surface and bond together into a solid block. This material can also be extruded at a higher density, which results in a larger and stronger piece of board. The XPS board has high thermal resistance and is therefore popular for use in thermal bridging systems and underlayment.

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