Hi all

My building inspector has requested fire retardant wood stain on 10sqm sawn timber Cladding.

Anyone got any Recommendations? Cost?

I need 5 litres if two coats applied.

 

Technical.....the treatment should give a class 0 finish (or class 1 with a fire propagation index (I) of not more than 12 and a sub-index (i1) of not more than 6) when tested to BS 476. Alternatively there is a newer standard, BS EN 13501 where a class B-s3, d2 or better is required. The treatment should be suitable for external use.

 

Thanks David

 

@DH202020that's uncanny, my BCO has done likewise. What annoys me is that the cladding was present on original drawings and in place on both of the previous inspections without any mention of needing this Class 0 coating. My guess is that this is 'post Grenfell Tower' covering of backsides. Try Rawlins specialist paints. They recommended ThermoGuard for our job (₤253 for enough to cover 20m2).

Is this interior or exterior cladding?

 

I too may  have this issue. I have opted to leave my plant room in bare OSB. I have a feeling the BCO will want something painted on it.  I know such a "something" exists as I wired  whole house finished in OSB and that was passed once "something" was painted on it, that still left it looking like plain OSB.

Exterior Dave. Any cladding within 1 metre of a boundary is supposed to be Class 0 for spread of flame, they just didn't bother to mention that until the final inspection.

Thanks guys

The best I've been quoted is 5 litres comes with full specs £140 inc delivery

Name; Ultrafire

Not sure if this is a good price or not?  (although  NSS mentioned  253 squids )

 

 

I needed one that could be used on pre-varnished Thermowood which narrowed the choice and increased the cost 

I wonder if my plant room would get away without anything if I had a fire door between it and the habitable part of the house, and a smoke alarm?

1 hour ago, ProDave said:

I wonder if my plant room would get away without anything if I had a fire door between it and the habitable part of the house, and a smoke alarm?

I guess the difference between cost of fire door , door stops/furniture,  labour , smoke alarm and the fire retardant stain?