The WWA Standard for manufacturing wood windows and window - PowerPoint PPT Presentation

Wood Knowledge Wales and Bron Afron Community Housing The Case For Wood Windows The WWA Standard for manufacturing wood windows and window performance Kevin Underwood Wood Window Alliance

Introduction  Requirements for WWA timber windows  Other factors affecting high performance windows  Considerations for extending service life and reducing maintenance costs.

Timber Window Accreditation Scheme  The Wood Window Alliance technical specification for windows has developed from the requirements of the TWAS.

Whole life analysis of timber windows Whole Life Analysis of timber, modified timber and aluminium-clad timber windows: Service Life Planning (SLP), Whole Life Costing (WLC) and Life Cycle Assessment (LCA) Dr Gillian F. Menzies Institute for Building and Urban Design Heriot Watt University June 2013

Product Testing, European Standard  BS EN 14351-1:2006+A2:2016  Windows and Doors  Product Standard  Performance characteristics  Part 1 Windows and External Pedestrian Doorsets

Declaration of Performance and CE Label Any declaration for a performance characteristic that is an “essential characteristic” from Annex ZA of the product standard must be made first on the DoP. http://www.bwf.org.uk/publications/ce-marking

Product Testing, British Standard  BS 644  Timber Windows and Doorsets  Fully Finished factory-assembled windows and doorsets of various types  Specification

Product Testing Clause Heading Sub-clause Heading Part Clause Additional information Other referenced standards 10 Security 10.1 Basic 3 5.13.1 BS 6375- Security 3:2009 Annex A 10.2 Enhanced 3 5.13.2 PAS 24 Security 11 Safety in case of 11.1 Fire 3 5.2.3 Test and BS EN 14600 fire resistance classification 11.2 Reaction to 3 5.2.1 material of roof Test and BS EN fire windows only classification 13501-1 Performance Approved levels Document B 12 Safety in use 12.1 Impact 2 5.4 Test BS EN 13049 resistance Classification BS 6375-2 (see below) 12.2 Safety 2 5.3 Load bearing Test BS EN 14609 Devices (see capacity Performance BS EN 14351 below) level

Product Testing Test BS EN 1026 13 Weathertightness 1 6 Air Classification BS EN 12207 permeability 7 Weathertightn Test BS EN 1027 ess Classification BS EN 12208 8 Resistance to Test BS EN 12211 wind Classification BES N 12210 14 Operation and 2 5.1 Operating Test BS EN 12046-1 strength forces Classification BS EN 13115 characteristics 5.2.1 Resistance to Test BS EN 14609 static torsion Classification BS EN 13115 5.2.2 Racking Test BS EN 14608 Classification BS EN 13115 5.3 Load-bearing Test BS EN 14609 capacity of Classification 350 N threshold safety devices 5.4 Impact Test BS EN 13049 resistance Classification Table 2 BS 6375-2 5.5 Resistance to Test BS EN 1191 repeated Performance Min. 10000 opening and cycles closing As specified in BS EN 12400 Class 2

Product Testing 15 Hygiene, health Ventilation N/ Test BS EN 13141-1 and the device A Classification BS EN 13142 environment 16 Acoustic 3 5.5 Tested BS EN ISO 140-3 Performance Evaluated BS EN 717-1 17 Energy Thermal 3 5.6 Calculation General BS EN ISO conservation Transmitta method 10077-1 nce Numerical BS EN ISO method 10077-2 Hot box method Windows and BS EN ISO doors 12567-1 Roof windows BS EN ISO 12567-2

Quality Management Systems  BS EN ISO 9001:2015 – QMS  Factory Production Control  CE Marking – constancy of performance  Continuous Improvement

Tolerances  Prescriptive Tolerances in Standards  Process Variation  Effects on performance

Safety  BS 8213-1  Windows, doors and rooflights  Part1 Design for safety in use and during cleaning of windows, including door-height windows and roof windows  Code of practice

Installation  BS 8213-4:2016  Windows and doors.  Code of practice for the survey and installation of windows and external doorsets

European Timber Regulations  Regulation (EU) 995/2010  laying down the obligations of operators who place timber and timber products on the market http://ec.europa.eu/environment/forests/timber_regulation.htm 

Chain of Custody  Forest Stewardship Council  Programme for the Endorsement of Forest Certification

European Biocidal Products Regulation  Regulation (EU) 528/2012  concerning the making available on the market and use of biocidal products http://www.hse.gov.uk/biocides/basics.htm 

REACH  Regulation (EC) No 1907/2006  concerning the R egistration, E valuation, A uthorisation and Restriction of Ch emicals (REACH), establishing a European Chemicals Agency http://ec.europa.eu/environment/chemicals/reach/reach_en.htm  http://www.hse.gov.uk/reach/index.htm 

Smoke Toxicity The study aims at evaluating the need to regulate on toxicity of smoke generated by construction products in fire within the framework of Regulation (EU) No 305/2011 and the possible impacts of any such measures.

Emissions of VOCs COMMISSION DELEGATED REGULATION on the classification of performance of construction products in relation to their emissions of volatile organic compounds into indoor air

What is an EPD? An Environmental Product Declaration (EPD) communicates verifiable, accurate, non-misleading environmental information for products and their applications, thereby supporting scientifically based, fair choices and stimulating the potential for market driven continuous environmental improvement.

Environmental Product Declarations (EPD)  http://www.bwf.org.uk/toolkit/environmental- waste-management/what-is-a-life-cycle- assessment

Materials Health Cradle to Cradle Certified™ Banned List of Chemicals Chemicals and substances that are banned for use in Cradle to Cradle Certified™ products as intentional inputs above 1000 ppm (0.1%) by weight. These are materials which have a tendency to accumulate in the biosphere and lead to irreversible negative human health effects or have hazardous characteristics associated with their manufacture, use, or disposal. http://www.c2ccertified.org/resources/detail/cradle-to-cradle- certified-banned-list-of-chemicals Question to suppliers Please confirm that the products you supply to us do not use any of the materials listed in their production.

Materials Health Feasibility Study A wooden window frame, can be eligible for certification on a Silver level.

Biophilic Design Interior design expert Oliver Heath (pictured right), and Ed Suttie, Research Director at BRE Centre for Sustainable Products (left).

Biophilic Design The term ‘biophilia’ refers to the adaption or design of a building to the environment, rather than the other way around. The meaning of the word biophilia is a love for nature and it is considered by some to be the missing part of sustainable design. Biophilic design aims to create strong connections between nature and manmade environments which can have benefits for health and wellbeing.

The Circular Economy A Circular economy has the potential to give rise to much more resilient economies with more abundant resources and a healthier environment

BIM Building Information Modelling Land Rover BAR Team HQ Portsmouth BIM Level 2

SERVOWOOD Reasons for coating wood  Protection  Durability  Weather resistance  Appearance  Colour  Gloss and sheen  Texture  Enhanced performance  Fire resistance  Fungal and algal resistance  Coating to protect from substrate interactions :  Moisture movement  Interface problems e.g. adhesion  Chemicals in wood such as: tannin and resins

SERVOWOOD Research Laboratories and Natural weathering Sites

SERVOWOOD Weathering Tests Accelerated Weathering  UV-A fluorescent testing (2,000 hours). Natural Weathering  Traditional 45 degree exposure rig facing South. New Multifaceted Exposure Ring (MFER)  Allows exposure at zero, 45 and 90 degrees and N, S, E and W orientation.  Includes artificial wetting and heating.

SERVOWOOD Results – fungal growth

Coating Service Life

Factors that can affect coating performance Orientation of grain for coated surface – flat sawn or quarter sawn  Angle of coated surface – vertical, 15 degrees to horizontal, less than 15 degrees to horizontal etc.  Radius of arris (sharp) edges – 0mm, 1.5 to 3mm, greater than 3mm etc.  Surface quality – machined finish or sanded finish   Denibbing or sanding? – is process too heavy  Leave primer and undercoat to “absorb” the nibs? End-grain sealing – assessment of method used (materials and application)   Movement of timber  Flexibility of adhesive Tannin/extractive staining Idigbo not so much sapele  What do people use? Redwood, sapele, grandis, iroko 