Insulating a flat roof...

Improved thermal efficiency has positive effects on the environment through reduced energy usage. There are different options with their own benefits depending on the roof type you are constructing.

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The insulation for flat roofs is commonly produced as rigid boards making them easy to handle and install with the variety of waterproofing types and systems. Ordinarily, polyisocyanurate (PIR) insulation is used within warm roof construction as it has excellent dimensional stability and compressive strength, which enables it to withstand foot traffic without depression. Within an inverted roof construction the insulation needs to be able to endure a ‘buried’ scenario beneath ballast or a green roof without detriment to its properties or insulating capability; and so forms of polystyrene are utilised.

Bauder Warm Roof Insulation

Our principal manufactured insulation is BauderPIR which is both strong and inert and has a high compressive strength making it suitable for all kinds of load  bearing decks. 

BauderVIP is a vacuum insulation panel designed to provide high thermal performance in areas with limited installation height and is ideally suited for roof terrace applications. 

BauderROCK is our mineral fibre insulation with exceptional acoustic and fire resistance properties. The insulant is considerably heavier than PIR and may not be suitable for all warm roof constructions.

BauderGLAS is a non combustible cellular glass insulation that gives high compressive performance.

Fire performance of warm roof insulations

Bauder insulations within a warm roof construction all achieve the fire rating pertinent to the waterproofing system, as mentioned previously, so BauderPIR, BauderROCK and BauderGLASS are protected by the cap sheet, ad therefore not exposed, because it is the cap sheet that has to perform against external fire exposure.  Therefore, all Bauder warm roof insulants conform to Building Regulations in the same way.

Bauder Inverted Roof Insulation

Our Expanded Polystyrene and Extruded Polystyrene inverted roof insulations are designed to sit on top of our waterproofing systems. The insulation is always ballasted to stabilise it against wind uplift and flotation which can comprise items such as pebbles, paving or a green roof.

Fire performance of inverted insulations

Bauder inverted insulation is specified in buried scenarios and are fully covered with paving slabs etc and meet current Building Regulations without testing, again with the exception of being used in the construction of a 'Specified Attachment'.


Insulating a roof?