roofing
“To install a rooflight in a roof you will often need to cut part of one or more of the roof ’s rafters or joists away. You will need to fit a new support for the cut ends of the rafter or joist in question”
and safety. There are two sets of building regulations for
roofs - work on an existing roof and the construction of a new roof. Be sure to pay particular attention to Parts J
and L of Building Regulations; these deal with energy efficiency, thermal insulation and the protection of buildings against the threat of fire. Approval under the Building Regulations will
generally be needed for the installation of a new rooflight for the following reasons: •To install a new rooflight, the roof structure will often need to be altered to create the opening.
•The roof will have to be able to carry the weight of the new skylight. If the roof is not able to do so it will need to be strengthened prior to installation.
•Any rooflight installed must prove it has sufficient insulation against heat loss with effective energy performance.
•In the event a skylight is in close proximity to a boundary, its fire performance must also be taken into consideration.
To install a rooflight in a roof you will often need
to cut part of one or more of the roof’s rafters or joists away. You will need to fit a new support for the cut ends of the rafter or joist in question. Adjacent rafters or joists may also need strengthening, as they will be supporting the load transferred from the cut rafters or joists. Any room that a skylight is designed to serve will also need to be well ventilated. This can be
achieved using the skylight itself for both rapid and background venting. In terms of energy performance, any window or
door must comply with the minimum requirements of the Building Regulations in relation to the amount of heat that can pass through a window or door, including the frame. This is known and measured as a U-Value. This U-Value should not be exceeded.
The roofers best kept secret
The roofers best kept secret is finally out. Aquaseal Liquid Roof from Everbuild – a Sika company – is a new, 1-component, easy to use, all weather roofing system, ideal for waterproofing flat and pitched roofs. Creating a solid waterproof membrane which covers the entire area without any seams, Liquid Roof is applied in two coats straight from the tin and has a moisture triggered curing system to allow fast curing. Liquid Roof is completely rain resistant after just 10 minutes and will even cure if a pool of water forms on top of it, perfect for the unpredictable British weather. Suitable for use on a variety of substrates including concrete, mortar, brick and stone, Liquid Roof can be used on new roofs as well as refurbishing old. Available in slate grey colour in 7kg and 21kg tins, Liquid Roof will leave you with a professional looking, fully waterproof roof in just five easy steps. For further information on Aquaseal Liquid Roof or any other products from the Everbuild or Sika ranges, contact your local representative, call the sales office, or visit the company website.
0113 240 2424
www.everbuild.co.uk
Why choose Dryseal over ‘wet-lay’ GRP?
Fast becoming the specification choice for a growing number of Housing Associations, Dryseal is the unique component based fibreglass or glass reinforced polyester (GRP) roofing system from Hambleside Danelaw. Unlike ‘wet lay’ systems, the Dryseal system is supplied pre-cured and ready to install. All Dryseal GRP trims and membrane are manufactured under strict BS EN ISO 9001 and 14001 quality and environmental controls and then supplied via our network of fully trained Approved Contractors for installation on site. Dryseal should not be confused with ‘wet lay’ systems, which comprise fibreglass reinforcement saturated with liquid resin hand laid on site. Wet lay systems have greater potential for error as the process relies on fair weather from the outset. Liquid resin containing a catalyst is applied directly to a completely dry new roof deck. Dryseal is one of the most advanced GRP roofing systems available and comes with an insured guarantee which covers the water tightness of the system for 20 years, with an expected life of 30 years.
01327 701 900
www.dryseal.org www.housingmmonline.co.uk | HMM March 2016 | 45
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