Introduction
- Project description
- Conversion of barn (formerly a storage area for a farm) to residential dwelling. This involved removing day roosts for common pipistrelle and brown long-eared bat. A bat barn was provided as compensation.
- Ecologist’s name and contact details
- Martin O'Connor (Arbtech)
- Planning authority
- Cheshire East
- Brief site description
- Farm buildings surrounded by open pasture and hedgerows.
Pre-works roost structure
- Type of structure
- Building
- Use
- Agricultural Building
- Condition
- Not In Use
- Approx. age
- 50 years
- Main construction material of walls
- Brick
- Roof design
- Pitched Roof
- Roof material
- Slate
- Internal roof structure
- Timber Frame
Pre-works roost description
- Species
- Brown long-eared bat
- Number of bats max count
- 6
- Type of roost
- Day Roost
- Evidence of bats
- Bats Recorded Emerging/Re-entering
- Roost location
- Eaves
- Aspect of roost
- S
- Height of roost entrance (m)
- 6m
- Roost material(s)
-
- slateTiles
- Timber
- Nearest commuting feature
- Hedge
- Distance to nearest commuting feature (m)
- Not reported
Proposed works
- Description of works
- Bats were excluded from the existing structure using one-way exculsion flaps and a supervised roof strip. Roost loss was them compensated for by a bat loft in a purpose built garage/shed.
- Type of impact upon the roost
- Long-Term Roost Modification and Roost Loss
Proposed mitigations
- Type of mitigation
- Compensation
- Specific technical detail of measure
- Bat loft above a purpose-built garage provided as compensation.
Size: 6m x 5m x 2,5m
Materials: Rough sawn timber, bitumen felt
Additional info: Situated over a garage at approx. 5.4m high. A vapour proof membrane laid between the garage ceiling and bat loft. Open at eaves. Bat tiles and wooden entrances created at the gable ends.
- Roost location
- Bat House
- Aspect of roost
- S
- Height of roost entrance (m)
- Not reported
- Roost material(s)
-
- Bitumen Felt
- Timber Roof Frame
- Nearest commuting feature
- Hedge
- Distance to nearest commuting feature (m)
- Not reported.
Actual mitigations implemented
- Type of mitigation
- Compensation
- Specific technical detail of measure
- Bat loft above a purpose-built garage provided as compensation.
Size: 6m x 5m x 2,5m
Materials: Rough sawn timber, bitumen felt
Additional info: Situated over a garage at approx. 5.4m high. A vapour proof membrane laid between the garage ceiling and bat loft. Open at eaves. Bat tiles and wooden entrances created at the gable ends.
- Roost location
- In Roof Void
- Aspect of roost
- N
- Height of roost entrance (m)
- Not reported
- Roost material(s)
-
- Bitumen Felt
- Timber Roof Frame
- Nearest commuting feature
- Hedge
- Distance to nearest commuting feature (m)
- Not reported.
- Internal temperature and humidity of roost
- 30 degrees
Monitoring data
- Length of monitoring proposed
- 3 checks of the bat loft and 3 dusk surveys.
- Frequency of monitoring
- To be confirmed
- Type of monitoring
- Roost Inspection
- Date and time
- 4th July 2011
- Evidence recorded
- Currently no evidence of use. Bats found to be using the converted barn.
- Interventions made
- None reported.
