A building’s thermal performance is now as important an aspect of the building’s design and construction as its structure. Energy prices and climate change are often cited as the principal reasons for the increased energy and CO2 reduction standards required of our built environment. Less known is the fact that insulation can also play a major role in our health, safety, comfort and wellbeing.
When higher levels of thermal performance are required, this has a significant impact on building physics and other dynamic elements of a building’s performance.
Woodfibre insulation has a number of properties that enables it to provide a multifunctional role within the construction of a home. When specified and installed correctly, woodfibre provides protection against summertime overheating, enhanced acoustic performance and moisture control. The latter provides a building fabric with additional insurance against potential moisture problems that could otherwise undermine the integrity of the building and the health of the occupants.
Woodfibre is highly sustainable, locking up considerably more CO2 than is produced in manufacture. It can therefore play an essential part of a strategy for mitigating climate change.
This document provides information for specifiers and procurement specialists working on social housing projects. It is designed to help with the specification of wood fibre insulation within a social housing context. It provides performance criteria and indicates what needs to be considered when specifying woodfibre insulation.
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Design & Specification
Zero Carbon Homes—Zero Carbon Timber Solutions for Wales
What is the zero carbon timber housing solution for Wales?
This document proposes a range of timber build solutions. Results are based on the analysis of an appropriate and future proofed definition for ‘zero carbon’, followed by design and calculation to develop an understanding of the quantifiable factors of embodied and operational carbon. Using a fabric first approach, an examination of existing and alternative timber construction methods, materials and systems offers a range of developed timber solutions that are capable of meeting the target fabric specification. These include information on whole carbon emission and offsetting calculations for a range of key typologies demonstrating the routes to Zero.
The detailed report presents findings from the Home-Grown Homes Project including actions for further detailed design, training and skills, technical development and testing, design and modelling tools. These may be relevant for designers, manufacturers, specifiers and clients.
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Wooden Windows-Specification guidance for timber windows
Windows provide an outlook on the world. They help set the tone and character for a building and the area in which it stands. Windows define natural lighting levels and thermal comfort essential for the wellbeing of residents. They offer sound protection and keep homes safe from intrusion. Windows are an essential part of the building fabric and as such contribute to a development’s overall energy performance.
Modern factory-finished timber windows have a better environmental performance than any other window material. They have a longer service life and lower whole life costs than uPVC windows. Wooden windows can be repaired and recoated throughout their lifetime and are the best option for achieving zero carbon buildings. They can be sourced from local manufacturers using home-grown timber and support economic recovery in Wales.
The multiple benefits wooden windows deliver over their life-span in terms of maintenance, durability, embodied carbon, and other social and environmental aspects make them excellent value for money.
This document provides information for specifiers and procurement specialists working on social housing projects. It is designed to help with the specification of low-carbon timber windows in a social housing context. It provides performance criteria and indicates what needs to be considered to achieve these in practice. Windows are an essential element of the building fabric and should not be discussed in isolation. They should be considered very early in the design process when deciding what build system to use.
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Building Performance Evaluation Guide
New homes often fail to meet low-energy targets, and to satisfy residents with fundamental issues such as ease of use, summer comfort and energy costs. There is little Building Performance Evaluation (BPE) happening routinely on projects to close the performance gap. A step change is needed to transition to net zero carbon while making our homes comfortable, healthy and enjoyable.
This guidance is aimed at housing clients, and anyone interested in Building Performance Evaluation (BPE) who want to evaluate and improve the performance of homes.
Its purpose is to provide an introduction to applying BPE in practice on projects, with:
- Information for clients and project managers to gain an overview of the benefits of BPE, what the main BPE techniques can do, how to procure it, and the main activities to plan throughout a project from design to occupancy
- Guidance on the main BPE techniques available
- Tools for day-to-day use on projects, complemented by more detailed guidance, examples and references.
This guidance recommends a “core” BPE scope for clients and project teams wanting to understand and improve the performance of their homes. This provides a holistic look at performance, including people, the indoor environment, fabric performance, energy use and water use. It highlights how BPE techniques can work together, and the interactions between energy performance, people, and the indoor environment. It limits the involvement of experts and expensive equipment. Instead, the aim is to embed building performance throughout the project stages and empower project teams to deliver high performance.
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Cover image: © shutterstock.com / NDAB Creativity
Timber Cladding—Specification Guidance for Social Housing
Timber cladding has become increasingly popular, mainly for its sustainability credentials and low environmental impact: It has a low carbon footprint as it requires less energy to produce than any other construction material and helps lock carbon into the building fabric. It is made from renewable material – wood – and can be reused, recycled or used as fuel at the end of its service life. Timber cladding is widely available from sustainably managed forests and can be sourced locally.
With correct detailing, proper installation and appropriate materials, timber cladding will provide a long lasting decorative and functional façade to any type of development, new build or existing stock.
This document provides information for specifiers and procurement specialists working on social housing projects. It is designed to help with the strategic selection of timber cladding as an external rainscreen in a social housing context. It provides performance criteria for specifying timber cladding and indicates what needs to be considered to achieve these in practice. The document highlights performance benefits across a range of intended design outcomes and is designed to help ensure that timber cladding is used appropriately. Timber cladding should not be viewed in isolation and should be considered very early on in the design process when specifying details and deciding on what build system to use.
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Making the Right Choices—A Guide to Improving the Build Quality of New Build Timber Frame Social Housing
Making the right decisions for the benefit of a building’s long term performance and user experience can be compromised by cost, lack of experience, and poor understanding of timber frame construction.
This guide aims to highlight some of the key points to consider along the pathway of designing, constructing and maintaining timber frame housing.
These points have been compiled reflecting on experience gained by delivering BMTRADA’s frameCHECK on-site quality consultancy service.
By helping the reader understand more about the consequences of some of the decisions to be made during construction.
This report has been compiled as part of the Home-Grown Homes Project, which looked into the way that timber is specified and used in construction, with its focus being on manufacturing. The aim of this document is to help all those involved with timber frame construction to deliver better performing and longer lasting homes.
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Embodied Carbon Guidance for Welsh Social Housing Developers, their design teams, contractors and suppliers
This guidance has been written for those wanting to both increase their knowledge of Embodied Carbon in the housing sector and to understand how to reduce it. The target audience encompasses key stakeholders within Welsh social housing organisations including development and asset managers, their design teams, contractors and suppliers.
Clear and authoritative guidance is provided on how to procure and undertake an Embodied Carbon assessment, what benchmarks can be set, tools that can be used and how Embodied Carbon can be reduced. Examples are provided to show how others have tackled Embodied Carbon within their organisations and projects, with a focus on housing. Where relevant, other guidance and useful information is signposted.
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Authors: This guidance has been produced for Woodknowledge Wales on behalf of the Home-Grown Homes project. The document was authored by Jane Anderson of ConstructionLCA Ltd together with Katherine Adams, The Alliance for Sustainable Building Products.
Publication date: December 2020
Sustainable Construction Timber – Ivor Davies 2016
FC Scotland have released a new publication by Ivor Davies, Sustainable Construction Timber – Sourcing and Specifying Local Timber. This is an invaluable new tool that will help clients understand how to procure homegrown timber.
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