Maghull Town Council is having to spend more money on the town hall after the Lib Dems’ 'green' refurbishment of Maghull Town Hall roof failed to include insulation.
The previous Liberal Democrat administration signed off on the refurbishment just hours before losing control of the town council last year.
They committed Maghull council tax payers to pay £500,000 for the refurbishment which included a new roof and solar panels.
While claiming the work was to make the town hall more ecologically sound, the Lib Dems failed to install insulation as part of the high-cost work.
Maghull Town Council Amenities Committee chairwoman, Cllr Sandra Williams said "Labour is having to put right the mess the Lib Dems left behind" on Maghull Town Hall.
Cllr Williams said: "One of the excuses the Liberal Democrats gave us for pushing ahead with such an expensive refurbishment of the Maghull Town Hall roof was to make it more environmentally friendly.
"In their rush to sign off the loan agreement which saddled us with the £500,000 worth of debt in the day before the elections last year, they failed to get the roof insulated.
"Anyone in their right mind knows that the first thing you need to do to make a building greener is to get insulation.
"But instead of doing that, the Lib Dems had a new roof installed without any insulation whatsoever.
"So any benefit of having solar panels installed is wasted as heat energy is frittered away through the uninsulated roof."
Now, Maghull Town Council's Labour Group is now having to consider installing insulation. It is estimated the work could cost around £11,000.
Cllr Williams said: "We should not have to be paying this money for insulation which should have been fitted in the new roof from day one.
"We should not have been saddled with a debt of £500,000 in the first place.
"But insulation is what is needed and we will have to pay for it.
"It's just a shame the Lib Dems didn't think of that when the signed off on the roof more than 12 months ago."