SAP – which stands for Standard Assessment Procedure it is a government approved method of calculating the energy performance of dwellings. ​ All new builds, (including conversions and extensions) have to comply with Part L of the Building Regulations and produce an Energy Performance Certificate (EPC). SAP calculations are done to produce a predicted EPC prior to commencement of the work.

The SAP calculation needs to be submitted to Building Control at the design stage with your Building Regulations application. ​ Then when the development is completed an As-built Stage SAP Calculation and EPC must be submitted to Building Control for final approval.

The length of time it takes to complete a SAP Calculation will vary depending on the size and complexity of your project. It is important that you instruct us as early on in the process as possible for ultimate speed. However, we normally can turn extensions out within three days.

We are extremely competitive, a quick call with an OCDEA assessor is the best way forward to get the right price for your project.

We encourage clients to adopt a fabric first approach, ensure Psi Values are properly calculated and invest in renewables. An assessor can work closely with you to ensure that you achieve the desired result if required.

We aim to complete within three days of receiving the required documentation.

Yes, we can, plus more specialized services if required.

Yes we do, times to be agreed, we also do Teams/Zoom.

The quantity of energy (watts) that may pass through 1 m² of a building component when the temperature difference between the two sides is equal to 1oK (Kelvin) is known as the U-value, or thermal transmittance. Low heat transmission is a feature of thermally efficient building materials, such as EPS insulation. This indicates that very little heat can travel through that particular part. The ISO 6946 standard forms the basis of the computation procedure. The kind of building component—such as the floor, wall, or roof—must be determined, and the thermal resistance (R) of each material used to construct that component must be computed in order to get the U-value. We must know the thickness and thermal conductivity (λ) of the building material in order to calculate this. Heat loss is undesirable, particularly when designing environmentally friendly and energy-efficient structures. It is important to make sure that every building component has the lowest feasible U-value in order to attain optimal performance.

Psi-Value computations must be included in all SAP assessments in order to comply with Part L1A Building rules.

Using thermal modeling software, every material of an architectural detail is replicated. A Psi-Value is produced by the resulting model, which is based on the assignment of a thermal conductivity and boundary conditions (much like a U-value). In order to provide suggestions on how to further enhance the junction's performance, heat fluxes and temperatures via the model are also recorded.

The measurement of each thermal bridging length's unique Psi-Value is guaranteed by the thermal modeling offered. We are able to locate, evaluate, and address instances of thermal bridging in construction detailing thanks to the advanced algorithms we use. As a result, we can offer suggestions on how to cut down on energy use and construction expenses, as well as guarantee that homes comply with SAP 10.

Pricing will vary depending on size and complexity of the project.

Buildings are directly responsible for more than 40% of the energy used in the EU and 44% of carbon emissions in the UK. In order to satisfy our local and worldwide pledges to reduce CO2 levels, managing energy use and emissions in buildings is crucial. In the UK, our planning laws and construction regulations make sure that we design and construct structures that will not only benefit the environment now, but also for many years to come.

We strive to deliver standard building regulations reporting within time frames agreed after receiving all of your plans and paperwork. This can obviously change if there are more homes that need to be evaluated. We can normally complete typical buildings, conversions, extensions within a few days.

We need your blueprints as well as a build specification that details the construction and building services. A site plan, floor plans, elevations, and sections must all be included in the blueprints.

As long as the drawings are to scale or contain a scale bar to measure from, we can work with nearly any format. Normally, we work with PDF or.dwg files (CAD designs). When necessary, paper plans can also be accepted.

Many times, clients have had calculations completed at the design stage in the past; however, the assessor may no longer be in contact with them or may not be authorized to provide EPCs. We are sadly unable to use someone else's work for audit reasons; a new assessment will have to be conducted. After that, we can give compliant final reports and EPCs and supply building control with whatever they require.

U-values quantify the insulating efficacy of a building. The rate of heat transport through a structure is indicated by the U-value, which is expressed in W/m2K. Better thermal performance is indicated by a lower U-value (less heat transfer). The thermal resistance of every component within a structure determines its U-value, with insulation providing the majority of the thermal resistance.

As assessors, it is our responsibility to ensure that the construction on site accurately reflects the plan. As a result, merely giving a U-value during the design phase is insufficient. We can either use a computation from another source or assist you in creating a complete U-value calculation. Complete U-value computations must also be provided as proof at the as-built stage.