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Video Highlights
0:16 First step in installing a DuraPlus Chimney System
0:27 How to find the center for opening
2:24 Test hole in the ceiling
3:49 Checking the test hole in the attic
4:18 Check clearance for support box
4:46 Mark and Cut the opening
5:17 Measuring for support framing
5:54 Framing in the support box
6:41 How to secure the support box to the frame
7:27 Building a chaise around the chimney pipe
11:23 Installing the Flashing
13:40 Check to make sure the flashing is centered before securing
14:15 Securing the flashing to the roof
16:51 Installing the Storm Collar

Joe walks you through installation of DuraPlus Chimney Pipe.

Place wood stove according to the manufacturer's guidelines with the flue collar between the rafters or joists above, if possible. Measure from the wall to the center of the flue collar, then measure the same point from the wall at the ceiling. Use a plumb bob ensure correct positioning of the center point on the appliance's flue outlet and mark this center point on the ceiling. Using a wire hanger with the ends cut off as your drill bit, allows better visibility of your hole once you are in the attic, drill the center mark on the ceiling and leave the hanger in the ceiling. The hanger is long enough to go through the ceiling and any insulation in the attic.

In the attic you will want to find your "drill bit" and remove the insulation from the area so you can work. Using the round ceiling support box, mark appropriate cutting lines around the center point. You will need to build a frame for the support box between the rafters to support the chimney pipe.

The bottom of the Round Support Box must extend at least 3 inches below the finished ceiling to maintain the proper clearances. Level the Support Box and secure it to the framing using at least three 8-penny nails per side, you may also use 1-1/2" #8 wood screws, instead of nails. Next, you will secure the Trim Collar to the ceiling above the stove using the included (4) 1" long, screws provided.

In the attic cut an opening in the roof directly above the opening below, and at least 4 inches larger than the chimney's outside diameter to provide at a 2-inch clearance all around the chimney. The chimney pipe must be positioned within this opening and retain the 2-inch clearance to combustibles. The easiest way to do this is to mark the center point from the inside and drill through the roof, leaving the drill bit in place to find the hole once on the roof. Once on the roof to cut the hole for the chimney pipe, keep in mind the slope of the chimney and provide for this when measuring for the place to cut.

An Attic Insulation Shield is required where the chimney passes into an attic. An installed Attic Insulation Shield is 15 inches high and cannot be cut down by code. In attic areas where this shield cannot fit, you must enclose the attic portion of the chimney in a framed enclosure. You may use just plywood or particle board for this box as it will be outside of the frame for the round ceiling support box.

Mount the upper edge of the flashing under the roofing shingles by gently prying the shingles off of the tar line and removing any nails that may be sticking up. Gradually work the flashing under the shingles so that it lines up over the opening, trim shingles around the flashing so that they lay flat.

Place a bead of high temp sealant all the way around the underside of the flashing 1-2 inches in, this is not required but does add that extra line of defense from water intrusion.

Nail the flashing to the roof along the upper edge and down each side with 1-inch roofing nails, about 4 inches apart. Seal all nail heads with a High Temperature non-hardening waterproof sealant. Do not put screws through the Flashing into the Chimney Pipe.
Slide the chimney pipe down through the flashing and connect to the chimney pipe below or to the support box. Run a bead of high-temp silicone sealant just above where the collar will sit in the pipe. Place the storm collar around the chimney pipe and select the correct size needed to fit your pipe, some storm collars fit multiple sizes of pipe, trim off any excess if necessary. Insert tab into the slots on the collar so that it come out the other side and gently bend the tab back over to "lock" it in place. Push the collar down to the flashing and seal on top with a high temperature non-hardening waterproof silicone sealant. Also be sure to run a bead down the seam and around the tab.

After installing enough DuraPlus chimney sections to meet the height requirement of at least three feet above the highest point within 10 feet, attach the DuraPlus chimney cap onto the top of the chimney by holding the collar of the cap and twist locking it onto the chimney. The chimney cap can be removed easily for chimney cleaning.

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