Simply re-work the mortar either with a paddle mixer for 1-2 minutes in a clean bucket, or in a clean drum mixer for 5-10 minutes.
Please contact us for further information.
Lime mortars start to set once the water comes away and allows the carbon dioxide to react (carbonation) which is a slower process than sand and cement mixes, or hydraulic lime mixes. Prevent rapid drying by protecting the mortar against the effects of drying winds, strong sunlight, rain and frost with mortar fleece or hessian. Bricks, or stone must be wet down first to control the suction, and stop the Ashlar mortar drying out to quickly, in warm weather gently mist spray with water after application and cover if required with damp hessian sheets. In cool weather cover fresh mortar with protective sheeting to help avoid frost damage. Do not allow freshly mortar to freeze after laying until it has dried and gained strength.