HY-CBBT1741K-10W BigTop Multi-Flue Chimney Cover, Black Galvanized Steel, 10" H x 17" x 41" - with Minimum 20" x 44" Required Overall Chimney Dimension

Overall it's a durable piece, but know that it arrives in 5 pieces and will be a little wobbly until it's been secured into place.

It came with everything i needed and was installed in about 20 minutes. I pre-measured and drilled directly into the brick at the top of my chimney.Only thing is it came with 4 screws and 6 would have been better considering how large this is.

I'm reasonably happy with this in the end, but installing it wasn't great. The main issue was that the flanges which attach to the chimney crown are set to a fixed angle - maybe sloping down 10 or 20 degrees. If the mortar on your chimney happens to be different - mine is well over 45 degrees - it's a problem. You will need to bend the sheet metal to match the chimney, but the metal is stronger than the welds which hold it to the mesh part of the cap. When I tried to bend the metal with two pairs of vice grips I ended up breaking quite a few of the welds. I suppose you could do this better by clamping correctly-sized 2x4s on each side of the mesh-weld-flange area and then bending the exposed part of the flange. Of course you would have to repeat this on each of the 4 sides. Or they could make better welds. Or they could score the bend in the flange so it's easier to bend.[note: I'm using "crown" to mean the mortar around the actual flue or flues, and "cap" to mean this product]In any case, I got the cap flanges bent roughly to match the chimney crown and installed the 4 bolts. They felt very solid, so I trust that this thing won't fly away any time soon, even though the adhesive was garbage.The provided adhesive wasn't just stiff. It was impossible to extrude. I removed the entire disk down inside the nozzle (the one you usually just have to poke a few times) and still it was impossible to get any adhesive out. I squeezed until the sides of the cardboard tube started to collapse and still nothing. I had kept the tube inside overnight, so it wasn't cold. They really should throw away their current stock of bad adhesive and get something better, or just tell the buyer to get their own. Or just forget it completely. I would have had to do much more bending to get the flanges just right for good adhesive contact. Mine seems strong enough with no adhesive, and if there's doubt a couple of extra bolts should solve the problem.In place, the product looks and performs nicely.People have asked about noise - I heard it once when wind was rushing down the canyon we live in and taking limbs off of trees, but otherwise the chimney cap is silent. That's quiet enough for me.

This was a fairly easy job once I figured out what was needed to complete it.1) You will need a hammer drill. I got a hyper tough hammer drill from wal mart for about eighteen dollars.2) You need a caulking gun3) You need a 1/4 ratchet and an 8mm socket to torque down the masonry screws into the holes you drilled (learned this the hard way, don't use a flathead screwdriver)4) You need a marker to mark the outline of the cap to caulk inside that lineThere may be more you need, but that's all I can think of. I did use duck bill pliers to bend the tabs that join the cage part of the cap. You obviously want to assemble the cap first, before taking it up to the roof. Place it how you want it on the chimney, use a sharpie to draw the outline of its current placement and to mark the holes you will drill. Remove the cap. Drill your holes with a 3/16 masonry drill bit. Put a bead of caulk inside the sharpie line (don't cover up your drill holes, I left 2 inches on either side). Next place your cap back on the caulk and line up the drill holes. When putting in the masonry screws that come with the cap, start them with a #2 screwdriver, and then switch over to a 1/4 ratchet with an 8mm socket to screw them down tight. I really bloodied up my hands trying to use a screwdriver to tighten as they kept scraping the cage. That's it. Mine is the stainless model so I cleaned it up with some glass cleaner and all done.I really like the cap. Seems well made and made here in the USA. Came with caulk (mine was punctured so I reinforced it with duct tape before using), screws, and nuts to fasten the top to the cage. Simple and straightforward once you have everything ready.

Compared to any other options I could find for a chimney cap, this was, by far, the most economical, and I am very happy with the results. I didn't realize that it came with a tube of adhesive caulking, so I had already purchased some, however when the tube rolled out of the package I was pleasantly surprised. After I had carried it all up onto my roof, drilled the mounting holes, and began to try to squeeze out the adhesive, I wished I had carried the tubes that I had purchased separately up onto the roof. The Adhesive is incredibly stiff and hard to extrude; I was concerned that I was going to bend my caulking gun. Also, it wanted to stick to the tip of the tube more than the top of the chimney, so I was constantly twisting the caulking gun around and trying to smear the big blobs of adhesive onto where they needed to go.It was nearly impossible to create an even bead of adhesive around the perimeter. I doubt it really matters though, the cap is held on securely with screws and I'm not sure a complete seal around the perimeter is even a very good idea. The top of my chimney is almost perfectly flat so having a few spots where water that blows under the cap can drain away is probably sensible. It was a chilly day, (30 degrees F) when I installed it so maybe warming up the tube would have made the process easier, however I'm just guessing.

Easy to assemble and install. The one drawback was how the instructions said to use a slot screwdriver when a crescent wrench was needed to secure the screws.