2 items tagged "Manchester"

  • Air Tightness Testing

    Air Tightness Testing

    Delivering efficient and cost-effective Residential Air Pressure Testing services to meet all your Part L1A / Part L1B Building Regulations compliance requirements is our speciality.

    From one-off tests for home owners and self-builders, providing advice and consultancy for architects and quantity surveyors, through to hundreds of tests on large-scale developments for national construction companies. Our team of skilled and accredited engineers are committed to helping our customers achieve success.

    Achieving a successful pass to meet the required standard of Parts L1A or L1B of the Building Regulations is the final stage of a lengthy process that begins initially at the design stage for new or converted dwellings. Here at Build Compliance Ltd we recognise that each of our customers has differing requirements and possibly more importantly, differing levels of understanding of what is required along the journey to achieve successful completion.

    Drawing Review – off-site or on-site

    Desktop design advice for Part L1a of the Building Regulations, delivering advice and guidance at the design stage and beyond. Comprising a full review of your detailed drawings with the aim of identifying design flaws and potential anomalies within the build and providing advice on how these can be eliminated or overcome in an easy-to-read report.

    Normally this is a desk-based exercise carried out by one of our experienced engineers. However, if your build is already in progress we will be happy to attend a meeting on-site, at your convenience, to discuss the project.

    Contract Structural Air Sealing

    In our experience many of the Air Pressure Test failures that we encounter can incur expensive remedial action costs, as much of the basic air sealing should have been carried by completion of the first fix stage.

    This service is normally offered to the self-builder and smaller building companies. Often as part of a full involvement strategy from design review through to test, using robust products to seal identifiable air flow anomalies within the structure. Our sealing teams are co-ordinated by experienced Air Test Engineers and are able to bring tried and tested expertise to your build – such that you can be assured of peace of mind come test day.

    Pre-Air Pressure Test – Site Visit

    A pre-test site visit for Part L1a of the Building Regulations by one of our experienced engineers, comprising a top-to-bottom examination of the build (where accessible) with the client or site agent in a “walk and talk” format – where you can take notes and ask questions.

    As well as providing straight forward, practical advice and solutions we will also offer insight into the common leakage areas and pitfalls and the “Air Test mind-set”, ensuring peace of mind come test day. This service is highly valued by many of our repeat clients who have been able to steadily improve their Air Permeability performance and stay ahead of regulation changes.

    Pre-Air Pressure Test – Summary Report

    Our simple to understand reports are presented with annotated photographs, explaining the potential issues discovered in your Pre-Air Pressure Test visit. This is particularly useful when developing an Air Barrier Strategy and the subsequent co-ordination of on-site contractor responsibilities during the build process.

    Air Pressure Test – Pre-improvement of existing building

    For existing buildings (Part L1B of the Building Regulations) we are happy to undertake a formal on-site Air Pressure Test, prior to any improvement works being carried out.

    We will identify current air losses, deliver you a single to understand ‘tick box’ report, as well as identifying specific areas of leakage relevant to improving energy performance. The pressure test will be carried out to ATTMA TS1 issue 2 (BS, EN Standard 13829:2001) standard.

    Air Pressure Test – Post-improvement of existing building

    Following completion of the modifications to the existing building we will undertake formal Air Pressure Testing to quantify improvements in energy performance and air leakage. This testing will include the associated test report(s) and certificate(s). The pressure test will be carried out to ATTMA TS1 issue 2 (BS, EN Standard 13829:2001) standard.

    Air Pressure Test – Smoke Test

    Diagnosis using a combination of odourless, non-toxic smoke and building pressurisation to identify leakage exit points and flow paths, this is the most effective way to quickly identify defects within the building structure for air leakage. If the testing is for evidential purposes a detailed report can be provided upon request.

    Air Pressure Test – Site Visit

    Part L1A of the Building Regulations – we will carry out a one-off site visit involving explanation of the Air Pressure Test and our requirements, as well as provide an overview of the Air Pressure Testing process and offer advice on general issues where potential problems could occur. Please allow for up to 1 hour on site.

    Air Pressure Test – Official Test

    Part L1A of the Building Regulations – formal Air Pressure Testing to ATTMA TS1 issue 2 (BS,EN Standard 13829:2001) standard, to comply with approved document L1 of the Building Regulations including all associated test report(s) and certificate(s), which are produced directly via our online cloud portal. All of our engineers are BINDT Certified. An easy-to-read checklist will provide assistance to prepare the build for testing – FREE of charge.

    Within a single site visit for Air Pressure Testing – our test engineers are able to carry out up to 15 tests within the working day, under normal circumstances. Build Compliance Ltd offer all our clients significant discounts when conducting multiple tests in this manner.

    Air Pressure Test – Failure Report

    Part L1A of the Building Regulations – as part of our comprehensive service, should any of your Air Pressure Tests not meet the required standard we will be happy to produce a failure report – indicating why a test has failed and suggesting ways to ensure future success when the plot is re-tested.

    Air Pressure Test – Multi-Unit Testing
    Much of the Air Pressure Testing that we carry out is as the preferred supplier for a number of the country’s leading construction companies. Often on large housing developments or mixed residential and commercial sites which can require Air Pressure Testing on hundreds of buildings.

    For these large-scale projects we offer our clients a contract price and will undertake to carry out the workload over a number of visits to site. Each of these projects will be individually managed and we recognise that with such projects our skilled test engineers need to be flexible, adaptable and above all, committed to delivering results to the agreed schedule.

    All multi-unit testing projects will be carried out to Part L1A of the Building Regulations by BINDT Certified Test Engineers. Formal Air Pressure Testing to ATTMA TS1 issue 2 (BS,EN Standard 13829:2001) standard, to comply with approved document L1 of the Building Regulations.

    In addition, we can arrange for all associated test reports and certificates to be immediately delivered direct to the client/site contact, via our online cloud portal – thereby enabling our clients to remain abreast of status and progress at all times.

    For a free no obligation fee quotation for your construction project - Domestic or Commercial please call 0800 699 0904 or email us This email address is being protected from spambots. You need JavaScript enabled to view it.  or simply fill in our quote request form here

  • SAP Calculations

    What are SAP Calculations? 

    Build Compliance Limited provide fully accredited SAP and SBEM Calculations for Part L UK Building Regulations compliance as well as new build domestic and commercial EPC's for existing & new build commercial buildings, we are sure you will love our fees and our service contact us on: 0800 699 0904

    SAP Calculations are required for all new build homes, conversion of use to form a dwelling and most overglazed extensions

    SAP Calculations and SBEM are mandatory requirements for Part L of UK Building Regulations, the emphasis on construction methodology is changing rapidly and each new revision to part L gets more and more demanding of construction companies, in previous version of building regulations there was a sort of anything to pass approach from many developers, the new changes to Parts L1 and L2 are designed to ensure developers use a "Fabric First" approach, with the introduction of "DFEE" (Dwelling Fabric Energy Efficiency) a new requirement for compliance, we find the days of simply adding some form of renewable energy source have gone, now the emphasis is more towards better insulation levels, better glazing and improved Air Tightness levels.

    A SAP rating is the calculation that is required in order to produce a Predicted Energy Assessment and an On Construction Energy Performance Certificate.

    Building Regulations require that a SAP calculation and a Predicted EPC is submitted for new dwellings prior to the commencement of work.

    A SAP calculation indicates a score from 1 to 100+ for the annual energy cost based on:

    • The elements of structure
    • The heating and hot water system
    • The internal lighting
    • The renewable technologies used in the home.

    The higher the score the lower the running costs, with 100 representing zero energy cost. Dwellings with a rating in excess of 100 are net exporters of energy.

    SAP calculations allow comparison to be made of the energy running costs of dwellings anywhere in the UK. This is achieved because the calculations are predominantly location independent and are based upon a notional standard occupancy that overcomes variations associated with physical location and the differing ways in which people utilise their homes.

    A SAP calculation for a new dwellings is a desktop exercise, the client or their designer submits drawings, plans and specifications of the development to the assessor. It is recommended that the SAP calculation is undertaken early in the design process, this will help to prevent any costly re-design of the dwelling.

    SAP calculations usually involve 4 stages:

    Design (Draft stage)

    From the plans and drawings provided by the designer, the assessor prepares summary numerical information which includes the total floor area of the dwelling; the floor area of the lounge or living room; the areas of the heat loss floors, heat loss walls and heat loss roofs; dimensions of external windows and doors; storey heights, etc.

    From the specification provided the assessor calculates the performance of the thermal elements. These are expressed as 'U' values (the rate at which heat passes through the fabric of the building), the higher the 'U' value the greater the rate of heat loss. The assessor then inputs this data into the SAP calculation. Data is entered relating to:

    • Type of dwelling
    • Floors
    • Walls
    • Roofs
    • Openings (windows, doors, rooflights)
    • Ventilation
    • Main and secondary space heating
    • Hot water generation
    • Renewable technologies, including photovoltaic panels and solar water heating
    • Energy efficient lighting

    The software determines whether the proposed dwelling will comply with the requirements of the Building Regulations with regards to the conservation of fuel and power. The assessor is able to use the software to model different variations of the design if the initial specification doesn't show compliance. The assessor should then advise the designer of the shortfalls and recommend solutions as required.

    Design (Final stage)

    The client, designer and the assessor agree the finalised version of the design, this may involve amendments to the initial design in order to achieve SAP compliance. Data from the finalised design is input into the computer program.

    From this the assessor produces reports that the client or designer need to submit to Building Control, this will include a Predicted Energy Assessment (this provides a rating of energy performance based upon the specified design).

    Built (Draft stage)

    For the majority of new dwellings an air pressure test will normally be required (for small sites of 2 dwellings or less an air leakage value of 15 m3/(h.m2) may be used in the calculation and no test is required). The client or designer provides the results of the air pressure test (if required) to the assessor and also advise of any variations from the specification.

    The assessor will edit the SAP calculation to reflect the results of the air pressure test and any variations to the specification. The software is used to check that the completed dwelling still meets the requirements of the Building Regulations with regards to the conservation of fuel and power. If it does not the assessor recommends remedial action.

    For new build dwellings the assessor checks to ensure that the dwelling is registered on the Government's central database register of national property addresses. If it is not the assessor arranges for the address record to be created.

    Built (Final stage)

    The assessor finalises the SAP calculation and creates the Energy Performance Certificate (this provides a rating of energy performance based upon the dwelling as built). The EPC must, by law, be displayed in a new dwelling put up for sale on the open market.

    In addition there are other documents that are required by Building Control such as the SAP worksheet report and the SAP data input report.

    The assessor provides the client with the reference of the EPC so that the client is able to obtain a copy from the Government's central registry website at: www.epcregister.com/.

    Building Regulations require that an Energy Performance Certificate is provided prior to a completion certificate being issued.


    Since SAP calculations are based upon a desktop exercise, and not a site survey, it is critical, that the correct information is submitted, the following is a suggested list of the information sources and data items required.

    Information Required

    1.     Site address and postcode.

    2.     Site plan to include orientation of the dwelling(s).

    3.     Plans of each storey, normally at 1:100 scale.

    4.     Elevations drawings for each elevation.

    5.     Sectional drawings of the dwelling.

    6.     A written specification which must include:

    • Details of the principal heating and hot water system to include make and model of boiler, details of heating emitters, hot water cylinder size (if applicable) and the system controls.
    • Details of any secondary heating system present.
    • Details of ventilation systems.
    • Details of the internal and external lighting.
    • Details of the construction of all different floors to the property to include type and thickness's of insulation and any other building products used.
    • Details of the construction of all different external walls to the property to include type and thicknesses of insulation and other building products used.
    • Details of the construction of all different roofs to the property to include type and thickness's of insulation and other building products used.
    • Details of the doors and windows to include sizes, type of frame, type of glazing, thickness of glazing, any low emissivity applications.
    • Details of any renewable technologies utilised such as ground source heat pumps, solar water heating or photovoltaics

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