New Stove Fitted - Now Superficial Cracks In plaster

Luckycharms_74

Hi All

We recently got an inset stove or fire front as its commonly called on our back boiler. The heat from it is very good so far compared the the old open fire. The chimney breast is warm in the adjoining living room. It is also warm upstairs in the bedrooms and landing area. It seems some cracks have appeared in the plaster since the stove has been installed. My query is this

Is this common for this to happen with stoves ?
Should I worry about the superficial cracks ?

Finally I don't think the installation cost included a flexible flue liner in the chimney. Should I have gotten one installed. They say on the manufacturers website.

"Works perfectly in normal chimney"
"Can be used with or without flexible flue liner"

http://www.mulberrystoves.com/stoker.pdf

Any advice on this will be appreciated

paddy147

Luckycharms_74 wrote: »

Hi All

We recently got an inset stove or fire front as its commonly called on our back boiler. The heat from it is very good so far compared the the old open fire. The chimney breast is warm in the adjoining living room. It is also warm upstairs in the bedrooms and landing area. It seems some cracks have appeared in the plaster since the stove has been installed. My query is this

Is this common for this to happen with stoves ?
Should I worry about the superficial cracks ?

Finally I don't think the installation cost included a flexible flue liner in the chimney. Should I have gotten one installed. They say on the manufacturers website.

"Works perfectly in normal chimney"
"Can be used with or without flexible flue liner"

http://www.mulberrystoves.com/stoker.pdf

Any advice on this will be appreciated

Did you use fire resistant plasterboard/plaster??

Normal emulsion paint will also crack and peel due to the sheer heat of the stove.



I had a stainless twin walled flexi flue liner installed wity my Stovax Riva 66.A 6 inch wide liner to match the 6 inch wide outlet on the stove.

Luckycharms_74

paddy147 wrote: »

Did you use fire resistant plasterboard/plaster??

Normal emulsion paint will also crack and peel due to the sheer heat of the stove.



I had a stainless twin walled flexi flue liner installed wity my Stovax Riva 66.A 6 inch wide liner to match the 6 inch wide outlet on the stove.

Hi Paddy

I should have stated the plaster has cracked in the upstairs rooms. I would assume that it does not have a high heat tolerance.
I must contact the installer and ask about getting the flexi flue liner installed.
Thanks

jonsey38

hi
I,ve just installed a boru 600i and I,m at my wits end the walls have cracked upstairs and the just above the stove help any advice also the wall above the stove gets well hot and very warm upstairs the house is aboat 9 years old with clay flue straight up i jst put a cowling on pot to .

heinbloed

Two posters complain about cracks in the plaster along their chimneys after installing insert stoves which are designed for "normal chimneys"....

The installer made a mistake here, maybe being illiterate himself.

"Normal" means "suitable" in this case.

1.)Irish open fire places were designed and installed with a low output in mind, very small. Producing an output of around 2-3kw useful heat whilest burning away 5-10kw of fuel. The difference between output and fuel combustion is the lack of fuel efficiency.

2.) Irish open fire places were designed for coal and peat, not for timber.

The length of the flame of different types of solid fuel will cause the combustion happening in the combustion chamber (as usually wanted with a correctly chosen apliance)or/and in the flue gas pipe with a wrongly chosen apliance.
Note that a simple multifuel stove (burner) has only 1 efficient choice of fuel, all other fuels which can be used as well next to the most efficient fuel will burn as well. But not efficiently.

The problem seems to be with the two posters that they have believed in sales man talk and did not know that choices should be made based on facts.

" Multifuel grate for burning wood and solid fuel."

Read: the grate is designed for multifuel - not the stove.
(refering to http://www.borustoves.ie/BoruStovesBrochure%5B1%5D.pdf)

If the fuel gas burns within the "normal chimney" then it will heat up the chimney's interior, causing a physical strain for which the normal Irish chimney wasn't designed for.

Timber has a much longer length of flame than coal or peat.

Multi fuel burners are burners, they aren't very efficient room heaters unless they're equipped with sophisticated controlls like Lambda probes and automatic air valves/flaps.
Don't mix up a multi fuel burner/stove with an efficient room heater. The name says it already: the one item is designed for getting rid of organic matter (burner) and the other one to heat your room (room heater).

"Efficiency of thermal output" is the magic word, the question to be asked.To be asked to be calculated and guarenteed.
Most cheap device makers are shy to give this answer in writing.

It were the Irish and British stove manufacturers who stood in the way of EU regulations concerning the minimum efficiency of room heaters.
Thy would have to close the factories if reality became known to the consumers.

That 95 % of the fuel will be turned into heat is expected, but how much will get into the room and how much up the chimney causing damage there?
How efficiently will it heat the place where it is installed with the type of fuel chosen?

The desire to purchase had been fueled by the multifool stove gangsters, so to speak

Next time you know better.

jonsey38

thanks for reply but is there anything that can be done as the stove was expensive and i am burning turf init ?????????????do I need a flue liner or do i need to put plaster board on the chimmney breast and get it scimmed with hard wall any advice would be greatly appreciated

heinbloed

The device has to be isolated,taken out of use. The cracks are very likely in the chimney itself which makes it unsafe for use(CO poisoning).
Therefore a suitable liner has to be installed and the device can be reconnected.
Get a specialist in to do that.

Brianne

Just wondering Luckycharms how many rads you're heating and what kind of heat comes out into the room from it?

Luckycharms_74

heinbloed wrote: »

The device has to be isolated,taken out of use. The cracks are very likely in the chimney itself which makes it unsafe for use(CO poisoning).
Therefore a suitable liner has to be installed and the device can be reconnected.
Get a specialist in to do that.

I got the installer in to look over the cracks. He said they are fine and no need to install flexi flue liner. He also said he has installed numerous stoves over the years with out liners and never any problems ????

Luckycharms_74

Brianne wrote: »

Just wondering Luckycharms how many rads you're heating

We have 9 rads on our heating system. The rads closest to the back boiler chain are always piping hot. The further down the chain the less heat is there. I would guess that we get about 5/6 rads with decent heat from the back boiler. I did read some where that you will never get all the rads hot off the stove, unless you had something like a 15kw+ output stove and had it burning good all the time ( I stand corrected on this)

Brianne wrote: »

what kind of heat comes out into the room from it?

There is great heat in the room from it.

paddy147

Luckycharms_74 wrote: »

I got the installer in to look over the cracks. He said they are fine and no need to install flexi flue liner. He also said he has installed numerous stoves over the years with out liners and never any problems ????

So the plaster cracks badly,and hes says its fine?

Did he inspect the chimmney before installing the stove??

Did he do the plastering by any chance??

BrianMc1980

Hello,

Maybe I am a bit late in replying to this but there are heat resistant renders, plasters and plasterboards for this type of installation.

A link to a supplier in Ireland
http://www.hamco.ie/products/item/57-heat-resistant-plaster

I also think these type of cassette fires or hole in the wall fires are to be wrapped in insulation/ceramic blanket or shielded by vermiculite board to prevent heat traveling up the chimney breast.

My advice, if buying this type of stove, get it installed by the supplier.. That way if problems arise you are only dealing with one person.:)