We have an internal spiral staircase that we want to temporarily close to separate the levels and reduce noise between floors. Scope of Works: - Remove part of the handrail and balustrade as needed around the top part of the opening only. - Build a framed, insulated cover panel (cassette) to fit the opening: - Pine frame with cross members - MDF sheet on both the top and bottom glued and screwed - Acoustic insulation batts filling the cavity - Acoustic sealant around framing We will be doing rubbish disposal.