System Components

Primers, Sealants & Adhesives

The first classification grouping within the component table, primers sealants and adhesives. Used in the initial stages of roof assembly construction, and periodically throughout the installation process. Comprised of modified bitumen and/or synthetic compounds.

Air & Vapour Control Layers

A classification of low permeability material, usually a waterproof membrane, to control the movement of air and water vapour and reduce the risk of interstitial condensation. Installed continuous, with sealed overlaps in accordance with BS 5250 and BS EN ISO 13788

Insulation

Thermoplastic or thermoset polyurethane (PU), polyisocyanurate (PIR), expanded polystyrene (EPS), extruded polystyrene (XPS), spun mineral wool (MW), cellular glass (CG) or vacuum formed foil encapsulated panel (VIP) materials for use in a warm or inverted roof system assembly.

Base & Underlayers

A mixed component classification grouping comprised of reinforced bitumen membrane (RBM) waterproof layers which are laid first, perforated RBM layers laid to achieve partial bonding, or waterproof RBM layers that are applied between the base/first layer, top layer or capsheet. Installed by torching, pour and roll, cold adhered or hot air welding installation technique.

Reinforcements & Tape

Material components installed at slab and deck junctions, abutments, movement joints, change of angle and/or structure to complete a robust and durable roof waterproofing system assembly.

Capsheets & Top Layers

The uppermost waterproof layer in a roof assembly, comprised of reinforced polymer modified bitumen incorporating a self-protected ceramic granule or mineral slate finish (capsheet) or un-protected (top layer), requiring the application of surface protection such as cold-bonded stone chippings, loose laid ballast, paving slabs, living roof or blue roof finishes.

Self Adhesive Membranes

A classification of components with unique flame free application and bonding characteristics. This component grouping contains first layers, underlayers, top layers and self-protected capsheets, installed by flame free, self-adhered/heat activated, cold-bonding or hot air welding techniques.

Synthetic Membranes

Manufactured from PVC-p (Polyvinyl Chloride) and reinforced with glass fibre or spun bonded polyester to create a lightweight, flexible waterproof layer suitable for application in a mechanically fixed or cold-adhered roof system assembly.

Liquid Membranes

The most recent addition to our component table. Cold applied liquid membrane waterproof layers compliant to European Technical Approval Guidance (ETAG) 005, liquid applied roof waterproofing kits. A classification including polymer modified bitumen emulsions, single or two component aliphatic or aromatic quick cure polyurethanes and rapid cure methacrylates.

Roof Finishes

Roof finishing component classifications include all types of specialist accessory material that are used to finish a roof system assembly. Specified for functional, design, planning, sustainability and or aesthetic requirements.

Product Datasheets for Solar PV systems (panels, inverters, frames, cables and ancillaries) are available upon request from Axter Ltd's Technical Support Team, email: [email protected], telephone: 01473 935008.

Living Roofs

Created when a planting scheme is established on a roof structure to achieve environmental, sustainability, agricultural and social benefit. Living roof classifications can be separated into extensive, intensive, biodiverse and modular classes.

Accessories

A comprehensive range of rooftop accessory components to ensure compatibility and single source responsibility for the roof system assembly.

Separation & Filter Layers

A robust material layer or layers installed continuous with overlaps, to protect the waterproofing from material incompatibility and prevent fines from damaging the waterproof layer or blocking the roof drainage system.

Walkway & Protection

Flexible, robust and in some instances reusable layers that can be applied to a completed roof system assembly to delineate access routes and/or to provide protection to the primary waterproof layer during and post installation.

Geomembranes

Robust, impermeable, flexible bitumen membrane layer or layers named Coletanche^®, for use in environmental and geological protection, mining and civil engineering industrial sectors.

Roof System Assemblies

A unique combination of components, ordered in a specified arrangement, to create a roof assembly with distinct performance attributes such as use, durability, guarantee or aesthetic.