| abstract |
Construction element to form an expansion joint (202), in which the construction element acts as a physical and chemical barrier to hinder the entry of insects into the interior of a structure, the construction element comprising a polymeric foam containing at least an insecticide (201) substantially distributed throughout the polymeric foam; wherein the polymeric foam has a cell size of about 0.5 to 2mm, optionally 0.5mm to 1mm; wherein the polymeric foam has a density of at least 16 kg/m3; wherein the insecticide concentration is between 0.25 and 2% by weight; and wherein the polymeric foam is optionally a closed cell polymeric foam, wherein the polymeric foam comprises linear low density polyethylene (LLDPE) and low melting point ethylene-vinyl acetate (EVA), characterized in that, in on at least one outer surface of the building element there is a waterproof adhesive (203) attached thereto and a removable cover (204) releasably attached to the adhesive whereby the removable cover is adapted to be removed upon application of the element of construction. |