In a comprehensive review Nico have re-examined all our recommended friction hinge weights and sizes and issued new guidelines for fabricators. Earlier parameters were based on traditional window sizes and weights – as these have changed we feel it is sensible to review and reissue our technical guidelines. As a result many products are now approved for larger and heavier sashes, and up to date information has now been posted on the appropriate product pages on our website. Download pages have been updated, and hard copy material will follow with the next print run.