<b><b>Recent regulation changes have fuelled the war of words between timber and plastic window manufacturers. Tim Palmer looks at the implications of the ongoing standard changes</b></b><br><b>Criticism against the window industry for burying its head in the sand over recent regulation changes is refuted strongly by manufacturers who say the majority of the industry has been working hard to educate and prepare not only themselves but their customers about new requirements. </b><br><b>A Schuco spokesman said: &amp;“The suggestion pre-April that most window systems would be obsolete in under a year was an exaggeration. Schuco products are made for the Continent and therefore already comply with generally much lower U-values.</b><br><b>&amp;“The challenge isn&amp;’t reacting to the threat of obsolete products, but of being proactive in creating awareness throughout the supply chain of how to select the correct glazing products and systems in order to meet reduced U-values.&amp;”</b><br><b><b>part l compliance</b></b><br> Companies such as timber window manufacturer Mumford and Wood have invested in software to ensure Part L compliance as md John Mumford explains. &amp;“All products must be computer simulated on software to BS EN ISO 10077-2 to calculate the whole product U-value based on a standard product sample size of 1230 wide x 1480 high; …