Frequently Asked Questions
Our aim is to ensure you get the best materials and the best customer service possible. To help us in this aim we have provided some answers to the most frequently asked questions. If you can’t find an answer to your question here, please don’t hesitate to contact us and talk with our professional customer service team.
FAQ - YBS Insulation
Unlike traditional insulation which uses thermal conductivity, Foil Insulation use core thermal resistance and thermal resistance gained via low e cavities
The amount of insulation required in your application will vary depending on the type of insulation and target u-value, please feel free to contact our customer service team on 01909 721662
FAQ - U-Value
A U value is a measure of heat loss in a building element such as a wall, floor or roof. It can also be referred to as an ‘overall heat transfer co-efficient’ and measures how well parts of a building transfer heat. This means that the higher the U value the worse the thermal performance of the building envelope. A low U value usually indicates high levels of insulation. They are useful as a way of predicting the composite behaviour of an entire building element rather than relying on the properties of individual materials.
U values are important because they form the basis of any energy or carbon reduction standard. In practice, nearly every external building element has to comply with thermal standards that are expressed as a maximum U value. Knowledge of how to simply calculate U values at an early stage in the design process, avoids expensive re-working later on in a project. It allows the designer to test the feasibility of their project at an early stage to ensure it is fit for purpose and will comply with regulatory frameworks.
To calculate the U value of a building element such as a wall, floor or roof, we need to know the build-up of that element. Each building material should be positioned properly in sequence. The properties of each element / building material is required to enable us to calculate the overall u-value as accurately as possible.
Thermal resistance is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow. Thermal resistance is the reciprocal of thermal conductance.
A measure of the ability of a material to transfer heat. Given two surfaces on either side of the material with a temperature difference between them, the thermal conductivity is the heat energy transferred per unit time and per unit surface area, divided by the temperature difference. It is measured in watts per degree Kelvin.
A low emissivity (low e or low thermal emissivity) refers to a surface condition that emits low levels of radiant thermal (heat) energy. All materials absorb, reflect and emit radiant energy, but here, the primary concern is a special wavelength interval of radiant energy.
Emissivity is the value given to materials based on the ratio of heat emitted compared to a blackbody, on a scale from zero to one. A blackbody would have an emissivity of 1 and a perfect reflector would have a value of 0.
Reflectivity is inversely related to emissivity and when added together their total should equal 1 for an opaque material. Therefore, if asphalt has a thermal emissivity value of 0.90, its thermal reflectance value would be 0.10. This means that it absorbs and emits 90 percent of radiant thermal energy and reflects only 10 percent. Conversely, a low-e material such as aluminium foil has a thermal emissivity value of 0.03 and a thermal reflectance value of 0.97, meaning it reflects 97 percent of radiant thermal energy and emits only 3 percent. Low-emissivity building materials include window glass manufactured with metal-oxide coatings as well as housewrap materials, reflective thermal insulations and other forms of radiant thermal barriers.
FAQ - Multi-Foil Insulation
Unlike traditional insulation (PIR or Mineral Fibre) which work by trapping within it structure, multi-foils work by utilising the core thermal resistance and thermal resistance gained from the reflective foil surfaces.
SuperQuilt or ThermaQuilt are both insulating vapour control layers when installed in a roof or wall application as the inner most layer, with all overlaps taped and sealed removing the need for an additional VCL.
BreathQuilt is a 2 in 1 insulating breathable multi-foil, which works by allowing moisture within the construction to pass freely, removing the need for an additional breathable membrane.
FAQ - Foil Membranes
Unlike traditional insulation (PIR or Mineral Fibre) which work by trapping within it structure, foil membranes work by utilising the core thermal resistance and thermal resistance gained from the reflective foil surfaces.
YBS Foiltec and Airtec are both insulating vapour control layers when installed in a roof or wall application as the innermost layer, with all overlaps taped and sealed removing the need for an additional VCL.
FAQ - Cavity Closers
Cavity closers (Easi-Close) are available in two profiles (50mm to 100mm and 100mm to 150mm) and can be cut to fit various size cavities removing the need to order or stock specific sized cavity closers.
YBS Insulation at a glance
Years Manufacturing Insulation
Metres of insulation manufactured per year
of our products