What Is Polyurethane Foam?

Spray Foam Insulation

What is Polyurethane Foam?

Spray Polyurethane Foam is an insulation product that is spray-applied in situ at a building site. Two liquid components, MDI(A) and polyol blend(B) are mixed under pressure and sprayed onto a roof or wall cavity. The reacting liquids expand and solidify into a foam matrix creating a seamless seal. Spray Polyurethane Foam adheres well to the area it is applied to, providing an air barrier that prevents thermal leaks.

Click on the picture below to open a larger version.

Rigid Foam Insulation

SPF: The right choice for residential buildings

SPF seals walls and cavities to save the homeowner money on heating and cooling expenses. Not only does it provide thermal protection, it stops moisture and air barriers mitigating dangerous mould and wood rot of the structure.

Energy Efficiency – Superior performance and value

  • Spray Foam reduces energy bills by up to 40%
  • Spray Foam has a higher R value and better performance than traditional insulation because it stops air leaks that can reduce R values by 25-40%
  • Polyurethane Foam expands and fills every space and crack preventing conditioned air from leaking out.

Healthier and Quieter – Improved air quality and comfort

  • By expanding to fill every crack and crevice Polyurethane Foam stops air leakage in and out, and prevents pollutants, dust, and allergen infiltration
  • Polyurethane Foam does not support mould and mildew
  • As an effective barrier, keeps moisture out and prevents it from forming condensation
  • With its sealing power foam reduces noise pollution. The air seals to absorb sound at varying frequencies. The Foam dampens sound vibrations transmitted through solid materials

Durable & Dependable – Lasting strength and value

  • Polyurethane Foam does not settle, sag, shrink or deteriorate. It says in place providing value year after year
  • Spray Foam adds structural strength. It does not have fasteners or seams which can reduce strength
  • Spray Foam walls have three times greater racking strength

Retrofitting and Renovation

Many existing buildings have no or minimal insulation. Polyurethane Foam is the insulant of choice for retrofitting a building due to its excellent thermal conductivity and many other benefits.

Limit loss of space

A common renovation challenge is the restricted amount of space available to fit the insulation. The excellent thermal conductivity of rigid polyurethane makes it one of the thinnest, least bulky solutions. Polyurethane insulation therefore minimises the loss of living and working space, which is especially important in cases where internal insulation is the only option. If the external building perimeter is limited, for example, due to neighbouring buildings, roof overhang or regulatory restraints, thin Polyurethane insulation solutions are an excellent choice to optimize space.

Improve air tightness and eliminating cold bridges

Many older buildings have areas where insulation is reduced (thermal bridging), for example, at joints and around windows, doors and gaps in the building envelope. These can all lead to air leakage. Cold bridges and air leakages can cause condensation. This is easily overcome by filling these gaps with Polyurethane Foam, which adheres extremely well to almost all building materials. Furthermore, a continuous layer of insulating foam can be sprayed onto floors, walls and roofs making the whole building envelope seamlessly airtight.

Increase living comfort

Consistent temperature control and air tightness increases living comfort considerably. Rigid Polyurethane Foam is one of the most effective insulants to achieve this: warm in winter and cool in summer, without adding to heating or cooling costs. In addition, insulation makes walls and floors warmer to the touch. Use of Polyurethane Foam eliminates draughts and the formation of condensation, which can lead to mould growth and the deterioration of building fabrics.

Achieve a better energy label

Some EU countries have introduced energy labels that rate buildings according to their level of insulation and energy consumption. This is a very important factor for buyers or tenants: the better the label, the more energy efficient the house and the lower the energy bill. Furthermore, a dwelling with a good energy label might have a higher market value when sold. Not only is Rigid Polyurethane Foam Insulation one of the most effective insulants, it is also strong, chemically resistant and has long-life performance.

Alan and the team at Advanced Foam & Coatings only use quality polyurethane foam supplied by Huntsman.

Foam Coating


Spray Foam Insulation Services

About Advanced Foam & Coatings

Insulation Wiki