As a benefit of membership, the following Technical Notes may be downloaded at no charge in .pdf format. Non-members of CWCT may purchase Technical Notes here.
Technical Notes have been written by CWCT and reviewed by experts in the field. They present an overview of each subject, provide guidance and give further sources of information.
These publications are intended for use only by appropriately qualified designers, specifiers and others (with relevant experience) in each case having regard to the particular circumstances and requirements of each case, and exercising professional judgement including the reasonable skill and care to be expected of a professional of the relevant discipline, in that context.
CWCT accepts no duty of care, obligation or liability, whatsoever, to its members or others, in relation to the use of these publications for any purpose.
| Number | Title |
| TN112 | Overhead glazing (12 pp) (supersedes TN68) |
| TN111 | Designing building facades to manage the risk of interstitial condensation (14 pp) |
| TN110 | Designing building facades to manage the risk of surface condensation and mould growth (25 pp) |
| TN109 | Thermal bridges within SAP and NCM calculations (24 pp) |
| TN108 | Thermal bridges (Psi and Chi values) (26 pp) |
| TN107 | Thermal transmittance (U-values) for built-up walls (50 pp) |
| TN106 | Fundamentals of heat transfer (24 pp) (supersedes TN46) |
| TN105 | England 2021 Building Regulation Overview – Energy performance (13 pp) |
| TN104 | Cladding Test Specimens (17 pp) |
| TN103 | Test samples for stick curtain walling (10 pp) |
| TN102 | Decision tables for site watertightness testing of walls (9 pp) |
| TN101 | Investigating water leakage through the building envelope (10 pp) |
| TN100 | Methods of testing glass balustrades (in preparation) |
| TN99 | Design of glazed barriers (10 pp) |
| TN98 | Fire performance of facades - Guide to the requirements of UK Building Regulations (17 p) - supersedes TN73 |
| TN97 | Selection of access equipment for facade maintenance (5 pp) |
| TN96 | Assessing cradle and suspended access equipment loads (11 pp) |
| TN95 | Weathertightness of windows, doors, window assemblies and curtain walls (12 pp) |
| TN94 | Shadow boxes (7 pp) |
| TN93 | Building information modelling - Principles for building envelopes (10 pp) |
| TN92 | Simplified method for assessing glazing in Class 2 roofs (3 pp) |
| TN91 | Structural performance of systemised walls - bracket calculations (in preparation) |
| TN90 | Structural performance of systemised walls - Bracket requirements and principles (10 pp) - supersedes TN28 |
| TN89 | Structural performance of systemised walls - Open profiles (8 pp) |
| TN88 | Structural performance of systemised walls - Buckling and torsion (13 pp) |
| TN87 | Structural performance of systemised walls - Closed profiles (17 pp) |
| TN86 | Structural performance of systemised walls - Connections (10 pp) |
| TN85 | Structural performance of systemised walls - Design charts and profile data (9 pp) |
| TN84 | Structural performance of systemised walls - Introduction (9 pp) |
| TN83 | Interfaces and joints - breathable seals (in preparation) |
| TN82 | Interfaces and joints - sealant movement joints (in preparation) |
| TN81 | Interfaces and joints - sealant materials (in preparation) |
| TN80 | Interfaces and joints - thermal performance (in preparation) |
| TN79 | Interfaces and joints - air permeability and water penetration resistance (in preparation) |
| TN78 | Interfaces and joints - introduction (7pp) |
| TN77 | Assessment and certification of rainscreen systems (4 pp) |
| TN76 | Impact performance of building envelopes: method for impact testing cladding panels (6 pp) - supersedes TN52 |
| TN75 | Impact performance of building envelopes: guidance on specification (10 pp) - supersedes TN52 |
| TN74 | Ventilation (14 pp) - supersedes TN32 |
| TN73 | Fire performance of curtain walls and rainscreens - replaced by TN 98 |
| TN72 | External shading devices (14 pp) |
| TN71 | Standards and performance classification of windows and doors (11 pp) |
| TN70 | Thermal and moisture performance of cavities in building envelopes (6 pp) |
| TN69 | Selection of glass to prevent falls from height (8 pp) |
| TN68 | Overhead glazing (8 pp) |
| TN67 | Safety and fragility of overhead glazing: testing and assessment (5 pp) - supersedes TN42 |
| TN66 | Safety and fragility of overhead glazing: guidance on specification (11 pp) - supersedes TN42 |
| TN65 | Thermal fracture of glass (6pp) |
| TN64 | Gaskets (12 pp) |
| TN63 | Glass breakage (10 pp) |
| TN62 | Specification of insulating glass units (10 pp) |
| TN61 | Glass types (9 pp) |
| TN60 | Performance of externally rendered cladding systems (6 pp) |
| TN59 | Introduction to externally rendered cladding systems (6 pp) |
| TN58 | Repairs to glass (3 pp) |
| TN57 | Cladding movement (7 pp) |
| TN56 | Accommodation of structural movement (12 pp) |
| TN55 | Movement accommodation in building envelopes (6 pp) |
| TN54 | Self-cleaning glass (8 pp) |
| TN53 | Method statements for the construction of building envelopes (11pp) |
| TN52 | Impact performance of cladding (10 pp) - replaced by TN75 and TN76 |
| TN51 | Environmental control glasses (12 pp) |
| TN50 | Solar gain and shading (16 pp) |
| TN49 | U-value of curtain walls (5 pp) |
| TN48 | U-values of windows (7 pp) |
| TN47 | Overall building envelope U-values (9 pp) |
| TN46 | Introduction to building energy transfer (10 pp) - replaced by TN106 |
| TN45 | Thermography and facades (9 pp) |
| TN44 | Whole building air leakage tests (7 pp) |
| TN43 | Film backed glass (6 pp) |
| TN42 | Safety and fragility of glazed roofing - replaced by TN66/TN67 |
| TN41 | Site testing for watertightness (6 pp) |
| TN40 | Sound environment behind a building envelope (5 pp) |
| TN39 | Sound transmission through building envelopes (5 pp) |
| TN38 | Acoustic performance of windows (7 pp) |
| TN37 | Introduction to building envelope acoustics (8 pp) |
| TN36 | Assessing the appearance of metals and finishes (6 pp) |
| TN35 | Assessing the appearance of glass (14 pp) |
| TN34 | Assessing the appearance of new curtain walling (4 pp) |
| TN33 | Breather membranes and vapour control layers in walls (6 pp) |
| TN32 | Ventilation (6 pp) - replaced by TN74 |
| TN31 | Pressure effects on insulated glazing units (6 pp) |
| TN30 | Cladding of buildings subject to earthquakes (5 pp) |
| TN29 | Design of curtain wall brackets (7 pp) |
| TN28 | Performance requirements for curtain wall brackets - replaced by TN90 |
| TN27 | Structural design of stick curtain walling - sample calculations (8 pp) |
| TN26 | Introduction to structural design of stick curtain walling (6 pp) |
| TN25 | Selection of applied finishes for metal (7 pp) |
| TN24 | Corrosion (7 pp) |
| TN23 | Cladding metals 2 - non-ferrous metals (7 pp) |
| TN22 | Cladding metals 1- ferrous metals (7 pp) |
| TN21 | Tolerance, fit and appearance of cladding (8 pp) |
| TN20 | Design of sealant joints (6 pp) |
| TN19 | Selection and use of sealants ( (7 pp) |
| TN18 | Gaskets - replaced by TN64 |
| TN17 | Weathertightness and drainage (7 pp) |
| TN16 | Joints in the building envelope (7 pp) |
| TN15 | Cladding types (7 pp) |
| TN14 | Curtain wall types (7 pp) |
| TN13 | Glass breakage (6 pp) - partially replaced by TN63 |
| TN12 | Specification of hermetically sealed glass units (7 pp) - replaced by TN62 |
| TN11 | Glass types (7 pp) - replaced by TN61 |
| TN10 | Superseded - replaced by TN41 |
| TN09 | Testing pressures (4 pp) |
| TN08 | Selection of windows - a checklist for specifiers (8 pp) |
| TN07 | Threat resistant fenestration (9 pp) |
| TN06 | Pressure-equalisation (9 pp) |
| TN05 | Wind tunnel testing (4 pp) |
| TN04 | Issues relating to wind loading on tall buildings (10 pp) |
| TN03 | Wind loading on wall cladding and windows of low rise buildings (12 pp) |
| TN02 | Introduction to wind loading on cladding (8 pp) |
| TN01 | Representing air leakage through windows and glazed cladding systems (8 pp) |