Part L is the section of Building Regulations which is dedicated to the conservation of fuel and power. There are 4 sections:
- Part L1A – New dwellings
- Part L1B – Existing dwellings
- Part L2A – New buildings other than dwellings
- Part L2B – Existing buildings other than dwellings
With each update to Building Regulations we would expect to see more onerous targets and a move towards zero carbon.
All members of the Blewburton team are licensed to prepare the SAP calculations to demonstrate compliance with Part L for housing and to produce final Energy Performance Certificates (EPCs). We also work closely with associated non-domestic energy assessors meaning we can assess all building types.
We have years of experience, which together with our in-depth knowledge of energy issues, means that we can give our clients advice on the most appropriate compliance solutions, managing the interplay between fabric measures and efficient building services, and between traditional and innovative techniques and technologies to arrive at the optimal solution.
Where required, following discussions with the client regarding the areas of the development which can be amended Blewburton will model a number of improvement scenarios. This may include the following areas:
- Improved insulation and U-values to walls, floors and roofs
- Improved glazing and doors or shading on windows where overheating is an issue
- Improved air tightness
- Calculated thermal mass
- Calculated thermal bridging
- More efficient heating systems, distribution, stores and controls
- Cooling and ventilations options
- Renewable technologies (including flue gas heat recovery, waste water heat recovery, solar thermal, solar PV, biomass and heat pumps).
It is always wise to address Part L early in the project. Using the SAP model as a design tool we can help you find the best, most cost-effective route to designing dwellings that meet the regulations and offer long lasting energy saving to occupiers.
Planning condition relating to energy and emissions? We write energy statements too.
SAP 10 is coming – read our guide on the changes and how to prepare.
Samples of our Part L SAP work can be found here:
Part L case studies
Part L1A (New build SAP calculation and EPC) – bungalow
Despite initial Fabric Energy Efficiency calculations not appearing positive, Blewburton helped the builder to work with the ICF supplier, bespoke Y-values for non-repeat thermal bridges and the final construction gained a strong compliance under Part L.
SAP (Part L1A) and Code assessment for a single dwelling – West Berkshire
Blewburton Limited helped a single four bed dwelling constructed within the North Wessex Downs Area of Outstanding Natural Beauty (AONB) to be Code Level 3 compliant.
SAP (Part L1A) and Code assessment for 12 dwellings – Buckinghamshire
Blewburton Limited worked with the developer from the early design stage providing advice on the most effective measures to take to achieve the desired Level 4 of the Code for Sustainable Homes, through to Design Stage submission and Post Construction Review. The construction subsequently won the LABC Central Building Excellence Award for Best Social or Affordable Housing Scheme.
Zero carbon options report
Blewburton helped Wokingham Borough Council to plan a two-storey sports and recreation centre with zero carbon emissions.
Energy & Sustainability Reports support of a planning application
Blewburton prepared a energy and sustainability reports as part of a planning application for 12 apartments and a new club building.
SBEM calculations; Part L2A of the Building Regulations
Blewburton was appointed to provide an assessment of the design of five warehouse units for compliance with Part L of Building Regulations.
SAP calcs for town houses – London Borough of Sutton
Blewburton Limited performed the requisite SAP calculations and modelling to allow the developer to avoid a costly air source heat pump installation that would not have met the specific carbon reduction compliance for this local authority.
Part L2B (SBEM calculations for a non-domestic extension)
Blewburton provided Part L2B of the Building Regulations assessment for a motorbike showroom extension despite this not having been a consideration during the build.
Part L1A (New build SAP calculations and EPCs)
Blewburton undertook the SAP calculations and supplied the London Plan Energy Report for a development of five houses and twenty-two apartments on a site in West London.
