Roofs

Building: Roofs
Roof area	Internal areas must be measured on site and recorded using dwelling sketches or architectural drawings.	Sketches/drawings showing relevant dimensions.
Ventilated or unventilated attic space	It is assumed that the attic space is ventilated however, if the Assessor can verify that ventilation to the attic space has been permanently blocked, then the Assessor can consider the attic space to be unventilated.	Sign-off from the insulation contractor confirming that the roof space is unventilated, or Confirmation by the BER Assessor noted clearly on a survey form, and photographic evidence, for example showing that any vents previously present would be blocked by insulation.
Heat loss roof U-values	It may be possible to gather information on site in relation to the dwelling roofs and this information must be used where available. Ensure insulation depth is representative of the whole roof area. If necessary, this may need to be established by taking the average of a number of measurements across the whole roof area. Different U-values (e.g., significantly different depths or materials) must be treated as separate roofs in DEAP. Where insulation is not accessible, documentary evidence of type and thickness of installed insulation and other layers in the building element in question must be used where available. Copies of documentation must be kept with the records for the assessment. When using documentary evidence, the documentation must indicate that the entire heat loss surface has achieved the non-default U-value. Where there is insufficient information available to calculate U-values, then defaults from DEAP Appendix S must be used as indicated in Section 4 above.	Photographs (e.g., showing insulation type/thickness) where available; For non-default U-values: U-value calculation; As-built drawings/specifications (signed off by the architect, engineer, or assigned certifier) stating the type & thickness of insulation installed, or Copies of Invoices with detailed description of materials (e.g., insulation type, thickness, and quantity), or Declaration of works for SEAI grant schemes showing area of surface insulated, insulation thickness and type, showing area of surface insulated, insulation thickness and type, or Report of works signed off by contractor showing area of surface insulated, insulation thickness and type; Certification of the thermal conductivity (λ in W/mK) of the insulation materials in the form of the Declaration of Performance or other appropriate certification such as NSAI Agrément; Photographs (e.g., showing insulation type and thickness), where available.

¶ Roofs

¶ Table 2.15 - Evidence Requirement for Roofs

Building: Roofs
Guidance on re-use of data for Roofs can be found here
Data Entry Item	Guidance	Documentary Evidence
Roof area	Internal areas must be measured on site and recorded using dwelling sketches or architectural drawings.	Sketches/drawings showing relevant dimensions.
Ventilated or unventilated attic space	It is assumed that the attic space is ventilated however, if the Assessor can verify that ventilation to the attic space has been permanently blocked, then the Assessor can consider the attic space to be unventilated.	Sign-off from the insulation contractor confirming that the roof space is unventilated, or Confirmation by the BER Assessor noted clearly on a survey form, and photographic evidence, for example showing that any vents previously present would be blocked by insulation.
Heat loss roof U-values	It may be possible to gather information on site in relation to the dwelling roofs and this information must be used where available. Ensure insulation depth is representative of the whole roof area. If necessary, this may need to be established by taking the average of a number of measurements across the whole roof area. Different U-values (e.g., significantly different depths or materials) must be treated as separate roofs in DEAP. Where insulation is not accessible, documentary evidence of type and thickness of installed insulation and other layers in the building element in question must be used where available. Copies of documentation must be kept with the records for the assessment. When using documentary evidence, the documentation must indicate that the entire heat loss surface has achieved the non-default U-value. Where there is insufficient information available to calculate U-values, then defaults from DEAP Appendix S must be used as indicated in Section 4 above.	Photographs (e.g., showing insulation type/thickness) where available; For non-default U-values: U-value calculation; As-built drawings/specifications (signed off by the architect, engineer, or assigned certifier) stating the type & thickness of insulation installed, or Copies of Invoices with detailed description of materials (e.g., insulation type, thickness, and quantity), or Declaration of works for SEAI grant schemes showing area of surface insulated, insulation thickness and type, showing area of surface insulated, insulation thickness and type, or Report of works signed off by contractor showing area of surface insulated, insulation thickness and type; Certification of the thermal conductivity (λ in W/mK) of the insulation materials in the form of the Declaration of Performance or other appropriate certification such as NSAI Agrément; Photographs (e.g., showing insulation type and thickness), where available.