Its not value the candle!
A B2 Fireplace Ranking on a item does not suggest that product or service can be utilised for fire stopping or hearth proofing.
When we do a hearth danger evaluation we normally make remark on fireplace halting. On just one recent career we commented that further fireplace stopping was desired. The shopper used a contractor who applied Soudafoam. On the tin its says the item is ‘B2 Fireplace Rated in accordance with DIN 4102’.
Our shopper then asked us to up date our fireplace danger assessment as these works experienced been completed..
Prior to signing this off we did some further study to set up what a ‘B2 Fireplace Rating in accordance with DIN 4102’ intended. Din 4102 is the European Classification of constructing components in accordance with their flammability. The Classes variety from A1 100% non flamable to B3 Simply flamable. This is what we discovered:
Ranking Degree of flammability Illustrations
A1 100% noncombustible (nichtbrennbar)
A2 ~98% noncombustible (nichtbrennbar)
B1 Tricky to ignite (schwer entflammbar) intumescents and some superior finish silicones
B2 Normal combustibility wood
B3 Easily ignited (leichtentflammbar)
As you can see from this a B2 ranking is not appropriate as a hearth halting product and possibly a B1, A2 or A1 classification is essential. The contractors’ provider experienced assumed that classification B2 indicated a 2 hour fireplace score and experienced marketed the material to a lot of other contractors who had been wanting for a fireplace stopping material.
Seeking for additional information and facts on Soudafoam on the web site we identified a record of the proposed utilizes heat insulation, sound insulation and several other works by using are proposed there are no responses on fireplace insulation.
The assertion B2 Hearth Rated is of course correct but seeking on the website for Soudafoam and coming across an advertisement like this
Soudafoam 1Kb2 Hearth Rated Aerosol Foam
I believe most individuals would presume that the merchandise does have superior fireplace proofing values.
To make the make a difference a lot more aggravating foam with the correct A1/A2/B1 classification is no a lot more high priced that the Soudafoam Product.
To sell one thing as ‘B2’ Fire Rated whilst factually proper is incredibly misleading. â�¨â�¨I posted this comment as a discussion inside the ‘Fire Danger Assessors and Consultants Group UK’ on LinkedIn. I acquired a really attention-grabbing reply from Gordon Alexander of Gordon Alexander Associates which I duplicate in comprehensive:â�¨
Be pretty aware of the use of PU foams. They must be analyzed to BS 476: Pieces 20/22, BS EN 1366-4 in the case of linear gaps and BS EN 1366-3 for services penetration seals. There is a extremely massive big difference involving Reaction to Hearth PU Foams such as B1 B2 etcetera and Hearth Resistence to Fireplace PU Foams. Have a appear at the ASFP Advisory See on Employing Polyurethane Foams and make certain that they are used as they had been tested. I have had quite a few an situation with this – in unique Fireplace Door Installations. Employing penetration foam for sealing doors is not a compliant set up… and vice versa of course. When employed on doorway installations the backing should really, in a lot of instances, be mineral wool topped off with at least 10mm of intumescent sealant and all as per suppliers recommendations and put in as for each exam info. You are unable to just ‘bang in’ a load of foam – in distinct B2.
I hope these remarks are valuable and aid make absolutely sure the correct resources are applied in the ideal circumstances.