Match it to the appliance, fuel, flue diameter and chimney system. Use manufacturer and competent-installer advice rather than choosing by shape alone.
Chimney Products for Weathering, Repair and Venting
Chimney work has to manage combustion gases, heat and weather at the same time. MacBlair stocks roof-level chimney components for repair and construction projects where the flue system, terminal and surrounding masonry have been specified.
Products must match the appliance, fuel, flue diameter and chimney construction. Do not reduce a flue or change terminal type by appearance alone. Existing chimneys should be inspected for blockages, damaged liners, loose masonry and water entry before new parts are fitted.
Weather the roof junction with correctly detailed chimney flashings and make good the surrounding slates or tiles. Any compatible jointing product must come from the specified roofing sealant system. Installation and appliance commissioning should be completed by a competent person for the fuel type.
Chimney FAQ's
An unused flue often still needs controlled ventilation to prevent condensation. Use a closure detail designed for disused chimneys and check Building Regulations.
Possible causes include damaged flaunching, flashing, masonry, terminal or condensation. A competent inspection should identify the source before repair.
Yes, it should be inspected and swept as part of checking the flue route, condition and suitability for the proposed appliance.
Sealant may provide a limited repair only where approved. Split flashing, failed chases or movement usually need proper replacement or refitting.