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DTW Ventilated firestop support set (used to support flue on joists)

Colour & Internal Diameter
Silver 5"
Silver 6"
Black 5"
Black 6"

Doing it yourself? Visit our "How to install twin wall flue" page.

This system provides ventilation to prevent heat build-up within an enclosed space (passing through from one room to another for example). You can also buy the bottom plate on its own - useful for passing into a roof void.

If you don't want to see the "slots" or look through them add one of these.

Three parts to this:

1. Plate that takes the weight that goes on top (on joists or wooden floor) and has little upstands of metal to differentiate it from (3)

2.Clamp to stop twin wall falling through (1)

3. Cover plate so everything looks neat on the ceiling.

The pics below are mockups but you should get the idea of how it all works.

Top plate has lugs and NO combustible material should be inside the lugs area.

Lugs as seen from BELOW

Looking up we would see something like this... polythene would not be in hole of course. The flue would be at least 7cm from the wood and hence you should see no cobustible materials through those events!

Top tip: No fire cement or glue of any kind is used when connecting twin wall pipe to twin wall pipe - it is just push-fit (with a locking band for added security). When to use fire cement on flue joints? Use the SEARCH function and type "sealing flue joints".

This is a twin wall clip-together chimney part used to build a new chimney. Twin wall clip-together chimney can be as close as 5-7cm to combustible materials (so is also useful for adding atop a stove to bypass a wooden beam).

Stove Fitter's Warehouse offers a full Twin Wall Design Service with all designs prepared within our Twin Wall Design Studio:

Duraflue Twin Wall was launched to the market during 2014 and, due to its high quality and innovative design, is already a favourite amongst professional stove fitters. Brackets are strong whereas other brands may be spindly and quality is premium. Do it once - do it good.

Customer Reviews

Based on 207 reviews
Neil Pearson

The Stove was delivered on time as promised. I would recommend the Log store version to anybody who has dogs as they love to sit in front of it.
The guys at stove fitters warehouse were very helpful on the chat and Ray's emailed design was invaluable.

Many Thanks,


Dan Haythornthwaite
Great service. Great stove.

Contacted stove fitters warehouse about fitting a stove in my house. I’ve installed plenty of gas stoves before but no log burners so required a little guidance. Great communication with Raymond and Julian throughout to ensure I had the right kit before I started. Stove is now in place and looks and works brilliantly. Twin wall is a doddle to put together. I’d highly recommend contacting them before considering purchasing a stove and or any flue kit and they will talk you through the process from selecting the stove to designing the flue. Cheers chaps!