Chimney Sweep Foam Block

Anyone with a chimney in use knows that it is important to have it swept regularly and one item that may be used during the cleaning process is a chimney sweep foam block. Chimney sweeps will know that using foam is a simple way to prevent dust and soot from falling into the room and most will have foam chimney blocks in their kits to seal an open fire or flue.  Reducing the risk of mess is the main benefit but the blocks also make the job of cleaning a chimney quicker and more efficient.

Foam blocks are easy to use and readily available.  Whilst there are commercial blocking systems, they are simple foam blocks, so easy to make. The most frequently used types consist of one single block with a split or two separate foam blocks pressed together. F.C. Hancox can cut foam to any size so we’re a great company from which to procure foam. We carry a range of inexpensive foams that are perfect to use as chimney sweep foam blocks. Sweeps can measure their existing foam and recreate a block that has served them well or they can carry a range of block sizes to suit any situation. To aid this, the Guild of Master Chimney Sweeps has a handy size guide for foam blocks for different types of fireplace, you can view this here. The Guild also recommends a low-density foam, so a general use foam, such as our CMF30H is an option.

Our friendly staff are on hand to answer your questions on the most suitable foam if you are unsure. If you do know the foam you need you can go directly to our foam cut to size page and your new chimney sweep foam block will be with you in no time.

Chimney Sweep Foam Block FAQs

What is a chimney sweep foam block?

A chimney sweep foam block is a foam insert used to seal the opening of a fireplace, stove or flue during chimney sweeping. It helps to prevent soot, dust and debris from entering the room while the chimney is being cleaned, making the job cleaner, quicker and more efficient.

What foam is best for a chimney sweep foam block?

A low-density polyurethane foam is generally best for a chimney sweep foam block because it compresses easily to create a seal around different fireplace and flue openings. We typically recommend CMF30H foam as a cost-effective option that is lightweight, easy to handle and suitable for regular chimney sweeping use. We can cut the foam to any shape or size, allowing sweeps and others to custom make their own chimney sweep foam block. If you’re unsure, get in touch 01202 486956 or info@fchancoxfoam.co.uk

Can chimney sweep foam blocks be cut to size?

Yes, chimney sweep foam blocks can be cut to any size or shape. At F.C. Hancox, our technicians cut foam blocks to your exact measurements, allowing chimney sweeps to create blocks that fit specific fireplaces, wood-burning stoves, access hatches and flue openings to their own specifications. On our foam cut to size page choose the shape nearest to the shape you need, if the shape isn’t there you can provide a template. If in doubt, get in touch, we’re happy to help.

What size chimney sweep foam block do I need?

The correct chimney sweep foam block size depends on the type and dimensions of the fireplace or stove opening being sealed. Many professional chimney sweeps carry several block sizes to suit different jobs. The Guild of Master Chimney Sweeps also provides recommended foam block dimensions for common fireplace and stove openings. See their guide here: Foam blocks size

How thick should a chimney sweep foam block be?

Most chimney sweep foam blocks are between 100mm and 200mm thick, depending on the opening being sealed. The foam should be thick enough to compress securely within the fireplace or stove opening while creating an effective barrier against soot and dust. Check the guide here: Foam blocks size

Can I make my own chimney sweep foam block?

Yes, many chimney sweeps create their own chimney sweep foam blocks and it’s easy to do so with our foam-cut-to-size service. Foam can be supplied as a single block with a central slit or as multiple pieces that can be pressed together around rods, brushes and sweeping equipment during use. For special cuts and shapes get in touch, we’re happy to help.

How long does a chimney sweep foam block last?

A chimney sweep foam block can last for many cleaning jobs when stored correctly and used carefully. Lifespan depends on how frequently it is used and how much compression it experiences. Professional sweeps will replace foam blocks when they no longer create an effective seal.

Can a chimney sweep foam block be used for wood-burning stoves?

Yes, chimney sweep foam blocks are commonly used with wood-burning stoves, multi-fuel stoves and traditional open fireplaces. The foam is compressed into the stove opening to help contain soot and debris while sweeping takes place.

Do professional chimney sweeps use foam blocks?

Yes, foam blocks are widely used by professional chimney sweeps throughout the UK. They are a simple and effective way to reduce mess during chimney cleaning and can be adapted to suit a wide variety of fireplace and stove designs. Foam blocks can be customised to the sweep’s own requirements using our foam-cut-to-size service.

Where can I buy a chimney sweep foam block?

You can buy a chimney sweep foam block made to your required dimensions using our Foam Cut to Size service. We can supply individual foam blocks, replacement blocks and custom-sized foam inserts for fireplaces, stoves and flue access points. Simply head to the foam cut to size page and follow the easy instructions.