Improper Stove Installation?

[BathDIY]

Have already got some great advice from this forum about other aspects of this installation.

Because of the number of aspects that lead me to believe that the installation finish is unacceptable I have started to get concerned about the safety of the install.

I noticed that they were using expandable foam to install the concrete boards (see attached sneaked photo) and the slate at the base of the chamber. During the install I searched the web and found that you can get fire retardant foam, OK I thought (at the time) no problem safety wise.

Should also add we spent £2,200 + on the install and supply of stove, not the Oak beam.

The installer is HETAS approved and I have contacted HETAS about this matter, because of the finishing issues. They have said that "HETAS does not permit any fire retardant expandable foam as it does not withhold continuous use of a high temperature, i.e a solid fuel appliance."

What would you suggest as my next steps, other than to fill, out the HETAS complaints questionnaire?

I would rather not see these idiots on my property again, I have Khrons a stress-related condition and don't want it exacerbated by this.

 

[SpecialK]

The foam is behind a fire retardant material? Also the top board is over the two side panels which would prevent it falling if the foam fails. Personally I would want some mechanical fixings in there too (top and side)

 

[BathDIY]

I was more worried in case the foam sends fumes into the room (I don't know that it is fire retardant foam).

HETAS have also now said that...

Having spoken to our technical team, expandable foam is not permitted to be used for a solid fuel appliance as it is not resistant to prolonged exposure to heat. The material that has also been used to line the fireplace does not appear to look suitable. The fireboard should be A 1 rated and comply with BS 476 and BS EN 13501 and should be able to withhold a minimum of 400 degrees.