Just had a replacement Patio Door fitted. This was brought in from the existing position of the old door. As a result -from the outside - part of the Cavity Wall Closer was exposed and this has been covered with Trim and sealant. Is this correct to have the Cavity wall closer exposed to the outside elements although be it sealed with a plastic trim and sealant. Only just done and I my worries are that there may be very time a problem with damp. Also as this is fitted to an extension - would outside noise travel through the walls.