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| Chiltern Dynamics invests in vertical sliding sash window |
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The standard has only recently been extended to cover this type of window but as Chiltern Dynamics Deputy Test Manager Vincent Kerrigan explained, we decided to commission the rig early, to be ready as soon as the revised standard was published. The first manufacturer to pass the test programme was sash specialist Masterframe Ltd. The testing includes:
Mr Kerrigan said, ‘There is no doubt that this is a tough standard, but it is also fair. The very design of vertical sliding sash windows means that they do have unique points to overcome with regard to security, such as the robustness of the sash lock and issues with regard to tilt/latch systems.’ Chiltern Dynamics can work with clients from the design stage and will help them extend their scope if they wish. ‘We are not designers, but we know windows and the areas of weakness that a test will uncover. We will therefore work closely with the manufacturer to ensure that obvious weaknesses are ironed out before the test takes place.’ The advent of security-tested sash windows is good news for designers working on Secured by Design developments. To be accepted, all ground floor windows and those easily accessible above ground floor must have the necessary test evidence, which manufacturers can now offer if they pass the BS 7950 test programme. ‘There has been a good deal of interest from manufacturers since Masterframe announced their success at Interbuild,’ Mr Kerrigan added.
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Chiltern Dynamics has invested in a testing rig for vertically sliding sash windows to meet demand from manufacturers who wish to undergo the rigorous testing required by BS 7950:1997 for enhanced security performance of windows for domestic applications.