Paragraph 2 Items to be included in insulation works
Subject to the provisions of paragraph 5, the insulation works shall include—
the conversion to double windows of all existing qualifying windows in each room in which there are to be insulation works or, if that is not practicable in the opinion of the responsible authority, the replacement by new double windows of all such existing qualifying windows, and such conversion or replacement shall be in accordance with the specifications set out in paragraph 6;
the provision and installation in each room in which there are to be insulation works, of ventilation as specified in paragraph 3; and
the provision of either—
a second door behind or in front of any external door opening directly into an eligible room—
the shortest horizontal distance between the 2 doors being not less than 150 millimetres, at least one of the doors being weather-stripped, and any glazing in the second door which reaches to less than 1,500 millimetres from the floor having glass of a thickness as set out in Table 1 below; and
the ceiling and walls between the two doors being lined with sound-absorbent material;
or, where in the opinion of the responsible authority it is not practicable to provide a second door—
a new door in place of the existing qualifying door, the replacement door being a new exterior quality door having a solid core and being not less than 44 millimetres thick, any glazed panel in the door having a minimum thickness as set out in Table 1 below (with the total glazed area not exceeding 50 per centum of the area of the door), the door opening being effectively sealed (including threshold seals), keyholes having covers on both sides, and any letterbox having flaps on both sides with effective seals and positive closers:
provided that a claimant for insulation work who desires to refuse an offer of a second door or a replacement door may do so without prejudicing his right to the carrying out of other insulation work or to a grant.