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Sealing siding to a stone fireplace

user-7075008 | Posted in General Questions on

We are installing shou sugi ban siding over r zip sheathing. We will fur out behind the siding with 3/4 ” solid furring. My question is …what is the best way to seal the siding and sheathing where it meets a stone chimney . This is an old house and we removed all the siding and sheathing down to framing… but there is still old siding  partially  behind the chimney.  The stone is an irregular surface.  Ideas?

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  1. GBA Editor
    Brian Pontolilo | | #1

    It's common for building inspectors to call for at least a 1 inch air space between masonry chimneys and combustible materials and I have heard of them calling for more. So, exterior chimneys on gable end walls like yours are often freestanding, if they are not anchored to the framing with some sort of metal strap which is sometimes done in high-wind zones. Is there a reason why you want to seal the sheathing and siding to the chimney?

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