Internet #203718280

Model #FCSF2020

21 in. x 21 in. Adjustable Stainless Steel Chimney Cap

  • Rust-proof stainless steel construction ensures durability
  • Oval mesh screen effectively prevents animal entry
  • Supported by a lifetime warranty
  • See More Details

Product Overview

Stainless steel adjustable mounts on top of the flue tile. Patented two piece design 24-Gauge 27 in. x 27 in. hood. 20-Gauge one piece base and animal proof 3/4 in. oval mesh screen.
  • The Forever Cap, stainless steel
  • Will fit flue sizes from: 19 in. x 19 in. to 21 in. x 21 in.
  • Lifetime warranty
  • Nothing else even comes close

Info & Guides

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Compare Similar Chimney Caps

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21 in. x 21 in. Adjustable Stainless Steel Chimney Cap
23 in. x 23 in. Fixed Stainless Steel Chimney Cap25 in. x 25 in. Fixed Stainless Steel Chimney Cap28 in. x 28 in. Fixed Stainless Steel Chimney Cap
BrandThe Forever CapThe Forever CapThe Forever CapThe Forever Cap
Name21 in. x 21 in. Adjustable Stainless Steel Chimney Cap23 in. x 23 in. Fixed Stainless Steel Chimney Cap25 in. x 25 in. Fixed Stainless Steel Chimney Cap28 in. x 28 in. Fixed Stainless Steel Chimney Cap
Accessory TypeChimney CapChimney CapChimney CapChimney Cap
MaterialStainless SteelStainless SteelStainless SteelStainless Steel
FeaturesRust ProofRust ProofRust ProofRust Proof
Product Weight (lb.)16151315
Interior Depth (in.)27232528
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Interior Depth (in.)
Interior Height (in.)
Interior Width (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Accessory Type
Chimney Cap
Cap Attachment Method
Color Family
Stainless Steel
Rust Proof
Stainless Steel
Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
Limited Lifetime Warranty

Questions & Answers


My chimney measures 21x17.25 inches. Will this fit?

Asked by Mike November 30, 2020

Will this fit a chimney with exterior dimensions of 17x21? That's the exact advertised size but I...

Asked by Richie November 13, 2020

My chimney is brick w/o a flue liner. 17 x 21 outside dimensions. What is the overlap dimension...

Asked by NGS September 21, 2020

I have a flue tile that measures outside 13"00 by 17/34", these are outside dimensions of the exp...

Asked by Ron August 12, 2020

How thick is the stainless steel

Asked by Jim August 4, 2020

Will this fit over the exterior of the brick. Another words slide over the top exterior of the c...

Asked by Paul June 27, 2020

Is this the same as a rain cap/ arrestor? Does it adjust smaller?

Asked by kiki April 22, 2020

Yes, it is similar to a rain cap.

Whats the Height of the cap?

Asked by DAS November 5, 2019

The height of this cap is 10 inches.

The overall height is 10 in. for the 18 in. x 18 in. Cap. How can I order a custom18 in. tall Ca...

Asked by AL October 13, 2019

Dear Valued Home Depot Customer, We have reached out to the manufacturer and their answer is, The customer service rep at HD is giving the customer the wrong info. The customer can order a custom cap from the Special order Desk at any HD store. The customer is being miss informed

measures opening 14X15 in ..... could this potentially fit

Asked by smokey July 22, 2019

The inside of the cap is 14 x 14, so if the outside of your chimney is bigger then the cap will have to sit on top of the chimney. This could be achieved with some hardware and a hammer drill to screw into the brick.

21 in. x 21 in. Adjustable Stainless Steel Chimney Cap - page 2

Customer Reviews

  • 4.5
    out of 276 reviews
  • 92% recommend this product
Filter by:
Showing 1-10 of 276 reviews
Almost 5 Stars
How odd.. it has 6 threaded holes and only came with 4 bolts?. Thanks to my neighbor he had 2 more I could use.
by Redneck
2 people found this helpful
Chimney Cap was perfect fit and very easy to install
Chimney Cap was perfect fit and very easy to install
by Wookie
2 people found this helpful
Good addition
Looks good, performed as advertised through the summer, keeping out leaves and rodents. Appears sturdy and I anticipate no problems for the winter.
by HomeDepotCustomer
2 people found this helpful
The chimney cap was very easy to install, and we love the look it gave us! We have recieved a lot of positive comments fron our friends and neighbors!
by HomeDepotCustomer
1 person found this helpful
A permanent solution
This chimney topper looks like it will be a permanent fix. The attachment is stable with 8 bolts to hold to the chimney pipe. Previous owner had a hard cap on the fireplace that required a trip to the roof to have fire. We like fires on cold rainy nights, not the best time to think about going to the roof. Unit appears durable and since it is stainless steel it will not require maintenance.
by MDFlight
4 people found this helpful
Well-made, but the photo is misleading
Bought this model in part b/c it appeared to have 2 screws on the long sides (6 total) to attach to the chimney flue. However, the 8x13 size uses a single screw in the center of each side, not the 2 pictured. The cap itself appears well-made, and so far I've had at least one very breezy day and it's still in place, but I did bed it in silicone caulk in addition to using the screws, and I'm sure that helps.
by MsToolBelt
5 people found this helpful
Solid, easy install
There was no existing cap on the chimney, only wire mesh to keep out animals. Purchased this product online - quick delivery (although it was loose in box with no packing). Solid, good gauge stainless. should last a lifetime. Easy installation - place on the flue and tighten the bolts. As the flue is oval and the cap is rectangualr, there are small openings in the corners on the underside; they're small enough I don't think it'll be an issue.
by KenS
1 person found this helpful
Best choice / Quality and Value
I decided to order this product from Home Depot because they were the cheapest and they offered free shipping It is well built, looks sturdy and fits perfectly on top of my fireplace. I would recommend this item without a doubt Look at the pictures and the work done...
by TheLandscaper
4 people found this helpful
Very Good Product.
Yes. It's very good. But, If you add a screw spacer(universal aluminum pipe,washer) will be better... I Think..
by wildass
3 people found this helpful
Nice attractive looks for chimney
The chimney cap is a great answer to debris and animal prevention as well as water down the flue. Great fit and finish
by Dcsquared
2 people found this helpful
Showing 1-10 of 276 reviews