Biba and CNA Insurance are to launch an online excess liability scheme at this years' Biba conference in Glasgow.
The scheme is aimed at small and medium sized UK-based contracting businesses with a turnover of up to £20m.
Plasterers, plumbers, window fitters and builders were all ideal clients for the new scheme, called cnaexcess.co.uk, said CNA.
CNA said it was now an increasingly common requirement for principals to request confirmation of insurance cover, both in terms of the cover provided and the limits of indemnity given.
The company said it aims to provide extra cover of up to £10m above the limits of insurance provided by the primary public liability policy for any one occurrence, through its website quotation system.
An online demonstration of the product will be available at the CNA stand at the Biba conference.
