Re: Insulation – is it possible › Forums › Hard floors and tough decisions › Insulation – is it possible › Current Page 19/09/2012 at 10:13 pm #16579 theyallexistFlatchatterChat-starter Thanks Jimmy. The OC doesn’t have any specific clauses dealing with flooring. They use to suggest a specific underlay (premium combi or similar), I have however been able to steer them away from this for obvious reasons.