<b><b>Regulation changes are driving innovation throughout construction. Tim Palmer looks at damp proofing, cavity trays and lintels - three hidden but vital home ingredients which are feeling the effect of new rules</b></b><br><b>&amp;“The recent rush of amendments to Building Regulations has led to a mass reassessment of the portfolios of all building product manufacturers keen to ensure that their customers comply with new criteria. We&amp;’ve not seen the last of these changes and this, along with other factors such as changes in construction practices, will lead to further product development and improvement.&amp;” </b><br><b><b>development pressure</b></b><br> Dennis Coward, development manager at lintel producer Catnic (see box below), speaks for many when describing the pressure manufacturers, even in traditionally &amp;“quiet&amp;” sectors, are under to develop. Simon Brown of dpc manufacturer Ruberoid agrees: &amp;“Some changes, especially in Scotland, have forced companies to improve products. While current regulations state door and window openings as a whole should have 30 minutes fire resistance, a review is likely in England and Wales which may state that individual products making up the opening construction should carry 30 minutes resistance. <p></p><p>&amp;“We&amp;’ve anticipated this - Ruberclose FR, an insulated, fire-retardant dpc for use around windows and doors, is basically three products …