Attach backing plate to silicon flue collar

Cut your silicon flue collar to the correct diameter based on your flue size. It is VERY IMPORTANT that this cut is done cleanly in one smooth cut with no jagged or rough edges as these will become a point of weakness where it will in th future split.

Place backing plate behind silicon flue collar and drill holes to attach the two together. We recommend eight holes and bolts. North, South, East and West with one more in-between each. Insert a bolt in each hole as it is drilled. IMPORTANT: No matter how hard you try to drill  holes equidistantly you will not succeed. This means the holes will only align in the backing plate and flue collar in the exact orientation as when they were originally drilled. Add a piece of masking tape to the same hole in the flue collar and backing plate to ensure easy and correct alignment for later in the process.

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Cut Hole in rain cap

Seperate the silicon flue collar and backing plate. With the rain cap correctly positioned on the yurt and all ropes tightened fast, decide which of the triangular opening in the crown wheel the flue will exit through. Traditionally this would be one of the two closest to the door. Other locations will bring the hot flue too close to the crown supports. Place the backing plate against the PVC of the rain cap in the triangular section you have decided the flue will exit through. Ensure the INSIDE CIRCLE is an equal distance from all woodwork as the inner circle represents where the hot flue will pass. Once you are confident it is in the correct position use a pen to draw a circle on the rain cap following the INSIDE edge of the backing plate. Remove rain cap and cut this circel out of the rain cap 2-3mm bigger than the circle drawn. 

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Attaching Silicon flue collar & backing plate to rain cap

Place backing plate on rain cap with the inner circle equidistant over the circle you have just cut. Use a marker pen to mark the holes you previously drilled in the backing plate onto the rain cap. IMPORTANT: Before you remove the backing plate from the rain cap add another piece of tape to the rain cap that aligns with the piece previously attached to the backing plate in order to easily align again later. The eight points you marked onto the rain cap now need to be drilled in order for the bolts to pass through. Drilling produces a nice clean hole. Ensure the hole is only just big enough for your bolts to pass through. A nice tight fit is preffered to a loose one. Placing a piece of wood behind each hole when drilling will help. 

With all holes drilled you can now place the silicon flue collar on the outerside of the rain cap and the backing plate on the inside. Using the tape on all three items to correctly align the holes you can now insert the eight bolts, attach nuts as loosly as possible at this point as you do not want to clamp the flue collar onto the rain cap at this point. With all eight bolts in place you will now inject silicon sealer between the silicon flue collar and rain cap. With a good thick bead of silicon sealer between the two surfaces you can now tighten the bolts together. This will squeeze silicon sealer out, remove excess but also try to use any excess to create a smooth seal between the outer edge of the silicon flue collar and the rain cap. Remove all excess from the inner circle. 

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Finally

Once silicon sealer has had time to set replace rain cap on the yurt in roughly the correct position. Insert flue through the silicon flue collar. Wetting flue collar with water and sometimes a small dab of washing up liquid can help as it should be a tight fit. If you are going to install a rain cowl on the top of the flue puipe now i the time to do it. Ensure flue and rain cap are in the correct position before tieing off all ropes. Once in the correct position you can now attach the support bracket to the flue and position the "feet" of the support bracket against the inside edge of the crown wheel. Screw support bracket to the crown wheel. 

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Check for any leaks the first time it rains. 

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Allow silicon sealer to dry 100% before lighting stove. increase temperature in stove slowly in order to observe installlation is correct. 

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