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Warm roof insulation

Warm roof insulation

Rigid board insulation is located above the structural deck and is suitable for most building types. Tapered insulation can create falls for the roof.

Overview

In a warm roof construction, the principal thermal insulation layer is located above the structural decking, resulting in the structural deck and support structure being at a temperature close to that of the interior of the building. In the case of a flat roof, insulation is usually in the form of either a rigid board above the deck.

It is necessary to incorporate a vapour control layer beneath the insulation to prevent moisture vapour from being forced into the insulation through thermal pressure from within the building. The waterproofing membranes are placed over the insulation to completely encapsulate it.

Read more about thermal design

Spotlight: BauderECO FF flatboard insulation

Our first step towards a sustainable future without compromising the quality and established long-term performance of our PIR insulation is in BauderECO FF.

Utilising the biomass balance approach, our ECO FF insulation is manufactured from 80% biomass and renewable inorganic materials. This is the start of our journey towards removing the use of fossil raw materials in Bauder insulation products.

Embodied carbon

Low embodied carbon compared to standard PIR insulation that uses 100% raw material from conventional fossil fuel derivatives based on the biomass balance approach. ECO FF is manufactured using renewable raw materials derived from biomass waste and residues from, for example, agricultural production, crop or food processing.

Certification

ECO FF holds REDcert2 sustainability certification: REDcert2-904-39352401. This is third party auditing for the use of sustainable materials in the chemical industry. This is for the chemicals used to make this PIR insulation and the finished product itself.

BBA certification is in progress to verify our performance data and, upon successful completion of testing will be added to our current PIR certificate.

Achieving thermal performance

The flatboards are available in three thicknesses to meet different thermal requirements or U-values.

  • 125 mm achieves an approximate U-value of 0.18 Wm2K.
  • 160 mm achieves an approximate U-value of 0.14 Wm2K.
  • 205 mm (two boards 125 + 80 mm) achieves an approximate U-value of 0.11 Wm2K.
Waterproofing compatibility

The ECO FF insulation has been tested and can be incorporated in to warm roof construction when specifying our Bauder Total Roof System including the system’s green roof scenarios, and Bauder Thermofol PVC single ply system.

Fire performance

ECO FF has the same fire performance of our conventional PIR insulation.

Use within green roofs, biosolar and solar PV solutions

Specifying ECO FF is easy for all these solutions, particularly within our BTRS system where the BauderPLANT E root resistant cap sheet will be incorporated for all green roof and PV solutions. If weight loading is a factor for the project, then the Bauder Thermofol PVC system for extensive green roofs, biosolar and solar PV is a consideration.

Spotlight: BauderPIR FA tapered insulation

Our innovative tapered insulation solution is faced on both sides with black aluminium foil to increase thermal efficiency and is available in various thicknesses to achieve the required fall and achieve the desired thermal requirements. The unique ridge and valley infill boards are combined in conjunction with the Bauder FA Tapered boards to simplify the scheme and installation.

Every tapered scheme we produce is designed to match the needs of the project and meet building regulations for the thermal performance of the roof.

Design of roof falls

Our technical department will design the bespoke tapered insulation scheme in accordance with the latest versions of BS 6229 for falls on flat roof surfaces and BS 5250 for control of condensation in a building. All our layout schemes are designed for minimal waste. 

Meeting Part L

Different layout designs will embrace location of outlets or drainage system and insulation thicknesses and maximum build up heights to deliver the thermal performance required. Our technical team will provide bespoke U-value calculations in accordance with BS 6946 Annex E (Calculation method) to confirm the thickness required and/or U value achieved.

Innovative solution

The unique ridge and valley infill boards are combined in conjunction with the Bauder FA Tapered boards to simplify the scheme and installation. Most tapered schemes will start with the use of a 3-board, 70-90 mm at its lowest point, to meet thermal requirements under building regulations.

Multi layered schemes

Multi-layered schemes are easily created to deliver falls over large roof areas and the tapered boards are used in a step-and-repeat manner. In these situations the BauderPIR FA-TE 160mm foil-faced boards are used to form the required base layer beneath the tapered boards.

Waterproofing compatibility

The FA Tapered Insulation can be incorporated in to all our warm roof construction waterproofing solutions, reinforced bitumen membrane systems, single ply and cold liquid applied.

Installation simplicity

The boards are easy to handle and quick to install and follow a bespoke layout plan provided to the installing approved roofing contractor. Only one ridge and one infill valley size is required for the whole tapered scheme.  Traditionally, many ridges or valleys are required for the same application.

Watch our BauderPIR FA Tapered Insulation video to learn more about how the solution improves drainage falls on a roof.

Your tapered roof project commands our attention

We will produce initial tapered proposals with drainage points for your roof plan before progressing the selected design to a full tapered scheme to accompany the finalised waterproofing specification. This service complements our flat roof service and is without charge.

Working with you to understand

Working with you to understand

Our technical managers are based nationwide and understand designing new build and refurbishment flat roofs with tapered insulation to provide falls to the roof and are supported by a team of Technical Support Assistants so you can be assured of a successful specification and project delivery.  We work with you to understand:

Our service to you

Our service to you

Our technical department will produce initial tapered proposals with drainage points for your roof plan before progressing the selected design to a full tapered scheme to accompany the finalised waterproofing specification. This service complements our flat roof service and is without charge.

Nigel Blacklock, Technical Director

Tapered insulation has been increasing in popularity over the past 40 years, but with the recommendation that flat gutters in the body of a roof should be avoided in the 2018 changes to BS6229, there has been an even bigger growth in the popularity of tapered insulation. There has also been a noticeable move towards direct drainage to the outlets and less use of gutters with falls, this is because it is usually on average thinner and therefore more cost effective.

Nigel Blacklock, Technical Director
Specification resources available in the technical centre

Contact us today about your project

Each project is unique in its requirements, and we have lots of resources and examples of our work available to help guide you. If you are looking for a warm roof solution for your project and not sure which type of insulation will right for the building's requirements, then get in touch with our team to discuss your project’s individual needs.