Mineral fibre insulation

Explore our series of white papers and topics investigating why mineral fibre may not be the ideal choice for a number of applications.

Cavity walls

We carried out a photographic survey of a number of sites using mineral fibre full fill batt cavity wall insulation. The survey uncovered a series of poor site practices which can lead to water penetration of the mineral fibre insulation. The effects are shown in detail in the white paper which can be downloaded below.

Timber frame walls

We used an independent cost model to compare two insulation solutions used to achieve a U-value of 0.27 W/m²·K in timber frame walls. The model compared Kingspan Kooltherm K12 Framing Board and mineral fibre insulation. The study's methods, results and conclusion are shown in detail in the white paper, which can be downloaded below.


We commissioned the BDA to conduct a series of tests to simulate the effect of pedestrian traffic on a flat roof installed with a series of insulation materials. If an unsuitable insulant is chosen for the level of pedestrian traffic on a particular flat roof, this could lead to the collapse of the insulation material. The study's methods, results and conclusions are shown in detail in the white paper, which can be downloaded below.

Loft insulation

Along with other authorities, we looked at a selection of subjects concerning loft insulation.

Firstly, we gained permission from a West Midlands local authority to survey ventilation and condensation with recent insulation upgrades. Secondly, we commissioned the School of Architecture, Planning and Landscape at the University of Newcastle Upon Tyne to carry out research into the effects of air infiltration and insulation application defects in ventilated lofts. Lastly, we gained permission to carry out a roof survey of pubicly owned properties so as to assess and record the condition of the loft insulation installed. View the results of all three tests in the white papers below.


In recent times, many claims have been made about the benefits of breathable constructions in general and in particular of breathable insulation. 

The basic argument that is presumed is that if constructions do not breathe then moisture will become trapped within a construction or within a building. This moisture may lead to surface condensation, mould growth and exacerbated dust mite populations, which may in turn lead to an increase in asthma.

It has been argued that breathability has not been given much consideration because of the poor breathability of widely used synthetic building materials. In order to verify these claims, Cambridge Architectural Research Ltd (CAR) carried out a study of moisture transfer and the significance of breathability in buildings. 

Mineral fibre in cavity walls

Mineral fibre in timber frame walls

Mineral fibre and walkability

Loft insulation: Workmanship, ventilation and condensation

Loft insulation: Compaction, settlement and heat loss

Loft insulation: Cold bridging, ventilation and heat loss at the eaves

Breathability: A white paper

Kingspan Insulation Ltd

For queries relating to insulation boards, cavity closers or membranes.





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