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Application of Combustion Appliance and Fuel Storage Regulations
69NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
(1) Any provision in regulations 70 to 74 and 77 which applies to a combustion appliance, shall also apply where solid fuel is intended to burn directly on a hearth without the installation of any app
dwellingnon-domesticcoastalruralFlue discharge clearances for readily ignitable roofs
3.13NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Where a flue discharges onto, or in close proximity to, a roof with a surface that is readily ignitable, such as thatch or shingles, the clearances to the flue outlet should be increased to that shown
fire-safetycoastalruralconservationRisk of spontaneous combustion in thatched roofs
3.13NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
It should be noted that thatched roofs can sometimes be vulnerable to spontaneous combustion caused by heat transferred from flues building up in thick layers of thatch in contact with the chimney. To
fire-safetyruralconservationAlternative flue liner materials for thatched roofs
3.13NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Non-metallic chimneys and cast in-situ flue liners can also be used provided the heat transfer to the thatch is assessed in relation to the depth of thatch and risk of spontaneous combustion.
fire-safetyruralconservationDiagram 3.2 - Flue outlet positions for readily ignitable roofs
Diagram 3.2NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Location of flue outlet A: not less than 1800 mm vertically above the weather surface and not less than 600 mm above the ridge. B: not less than 1800 mm vertically above the weather surface and not le
fire-safetycoastalruralconservation