I frequently am asked whether homeowners and contractors should remove roof shingles from a home’s roof before a new metal roof is installed. Ma| Filed under: Articles, Roofing Installation Tile battens are secured directly to the panel using proprietary fixings as recommended by the liner tray manufacturerHome | Roofing Information | Remove Roof Shingles Before Installing a Metal Roof? Remove Roof Shingles Before Installing a Metal Roof? The system is fixed to horizontal steel purlins. This detail shows the use of a metal pre-formed liner tray system with insulation ‘sandwiched’ between lower and upper metal panels. Roof Structure – Pre-formed insulated liner tray system (Advice should be sought from the liner tray Tile battens are then nailed to the counterbattens in the usual way.Ī suspended ceiling system is used (not shown). Permeable underlay is laid over the upstands and counterbattens are secured to the upstands using proprietary fixings as recommended by the liner tray manufacturer. Rigid insulation is positioned between the upstands of the liner tray. This detail shows the use of a metal liner tray system fixed to horizontal steel purlins. Roof Structure – insulated liner tray system This is a variation on detail (5) incorporating an additional layer of insulation between the rafters and ceiling. Insulation is fitted between the rafters.Ī 25mm wide continuous ventilation gap is required at low level and a 5mm wide continuous ventilation gap is required is required at high level. This detail shows a sloping ceiling and uses a vapour permeable underlay without roof space ventilation and is suitable where there is a room in the roof space. Roof structure – insulation at rafter with vapour permeable underlay (V2) Counterbattens are used between the rafters and plasterboard to reduce the number of perforations through the vapour control layer. Insulation is fitted between the rafters.Ī 25mm wide continuous ventilation gap is required at low level and a 5mm wide continuous ventilation gap is required at high level. This detail shows a sloping ceiling and uses a vapour permeable underlay without roof space ventilation and is suitable where there is a room in the roof space. Roof structure – insulation at rafter with vapour permeable underlay (V1) Counterbattens can be used to provide this gap.Ī 25mm wide continuous ventilation gap is required at low level and a 5mm wide continuous ventilation gap is required at high level. It is recommended that there is a minimum 50mm gap between the insulation and the underlay. Insulation is fitted between the rafters. This detail shows a sloping ceiling and uses a non-vapour permeable underlay and is suitable where there is a room in the roof space. Roof structure – insulation at rafter with impermeable underlay Low and high level ventilation should be provide to the batten cavity. To provide this a minimum 25mm deep counterbatten should be fixed over the rafters. It is recommended that there is a minimum 50mm gap between the underlay and the tiles to allow adequate air movement in the batten cavity. This roof detail shows a horizontal ceiling and using a vapour permeable underlay without roof space ventilation. Roof with insulation at ceiling with vapour permeable underlay Ventilation should be provided into the roof space in accordance with Building Regulation F2 and British Standard BS 5250. This is a traditional roof detail with a ventilated roof space and horizontal ceiling. Roof with insulation at ceiling with impermeable underlay Nevertheless, the range of examples given below should meet the needs of most new and replacement roofs. It would not be possible to illustrate every combination of roof structure and tile fixing method. Clay tiles can be put on a wide range of substructures.
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