Due for completion this month, the £1.1-million development must comply with Level 3 of the Code for Sustainable Homes, in addition to the revisions to Part L1A of the Building Regulations. Parkfield House Developments therefore needed an insulation solution that would meet the acoustic and energy efficiency requirements.
Installing Isover glass mineral wool insulation provides the opportunity to gain up to 27 credits in the Materials, Pollution, Energy and CO,,and Health and Wellbeing categories of the Code for Sustainable Homes. Parkfield House Developments specified and installed Isover’s Hi-Cav 32 100mm in the cavity walls, with Isover Acoustic Partition Roll (APR 1200) used in the internal partitions and Isover RD Party Wall Roll used in the separating walls to meet the performance levels required.
To meet Level 3, a 25 per cent improvement on 2006 Building Regulations energy efficiency standards is required. Bob Dolby of Parkfield House Developments comments: “Using Isover insulation materials enabled us to easily meet 2010 Part L1A Building Regulations, Code Level 3 of the CfSH and also meet Part E acoustic legislation targets with a Robust Details approved construction. As well as enhanced thermal and acoustic performance it will also help to improve living comfort and reduce energy bills for residents. We have used Isover insulation on previous projects and have always been very happy with the efficiency of the products and the ease with which they can be installed.”
Designed to satisfy the more stringent thermal performance required from Part L Building Regulations for 2010 and beyond, Isover Hi-Cav 32 glass mineral wool slab is installed during construction to fully fill the cavity between two masonry leaves in external walls. Easy to handle, cut and install, the strong yet resilient insulating slab is available in a variety of thicknesses in a 1200mm x 454mm dimension, compatible with conventional wall tie spacing. Capable of achieving u-values as low as 0.24 within an overall 300mm wall width, well within the 0.30 limit specified by Part L, no increase in house footprint is required.
Offering time and associated cost savings for housebuilders, Isover RD Party Wall Roll reduces the need for vertical butt joints to provide fast and efficient insulation and maximise acoustic performance in separating constructions. It has been approved for use in E-WM-17 Robust Detail constructions, which are guaranteed to exceed Part E Building Regulations, achieving a minimum 50dB (DnT,w + Ctr) using Isover RD Party Wall Roll in nominal 75mm or 100mm design cavities. Its use also eliminates the need for pre-completion sound testing.
E-WM-17 incorporating Isover RD Party Wall Roll delivers 3 credits under ‘Health & Wellbeing Hea 2 Sound Insulation’ for the Code for Sustainable Homes or 4 credits for BRE EcoHomes. The E-WM-17 construction achieves a B element rating in accordance with the BRE Green Guide to Specification 2008. The construction is drylined with gypsum boards directly to the inner face of the blockwork using a ‘dot and dab’ finish. This process eliminates the need to apply a sand and cement render, making Isover’s E-WM-17 RD Party Wall Roll system the fourth Isover robust detail construction to eliminate the need for wet trades on site, offering more cost-effective and accurate complete-job costs.
Glass mineral wool is a totally non-combustible material and Isover RD Party Wall Roll, manufactured under a Quality Assurance Scheme in accordance with EN ISO 19001: 2008, has gained a Euroclass A1 fire rating.
Isover offers a range of high performance insulation products designed to meet thermal, acoustic and fire safety requirements for the built environment. The company is committed to continuously improving the way in which its products and processes impact on the natural environment and seeks to ensure that, when in situ, its products use less materials, less energy and produce less emissions. It is the only glass mineral wool manufacturer to achieve the maximum possible recycled content, 86 per cent, using recycled glass that would otherwise go to landfill.
The company’s market-leading efficiency means less energy is used in the manufacturing process and the use of Isover insulation helps to reduce emissions. Over a typical 50 year lifespan of a building Isover insulation will save 300 tonnes of CO,,, which equates to over 375 times more CO,,than is needed for its manufacture. Products also boastODP (Ozone Depletion Potential) and GWP (Global Warming Potential) ratings of zero and the company recently achieved ISO14001:2004 certification at its Runcorn manufacturing site, reinforcing its ongoing commitment to environmental sustainability.