077968 46047
01395 742593
info@pecairsap.com

SAP Calculations and EPC’s

SAP Calculations - EPC's - Air Permeability Testing - Water Calculations - Ventilation Testing

SAP Calculations and EPC’s


As specialists not generalists we only deal with Parts L,F and G of the building regulations.

We take time to understand each project, not only on a technical level but also on a client level. We recognise that every client is unique requiring unique solutions to move their project forward.

We stronlgly focus on communication and  managing our client’s expectations and guarantee we will always keep to (or beat) agreed time scales.

As Built Sap calculations and EPC.(Prices relevant only if stage one has been completed)
STAGE 2

£50 (NO VAT)

  • No Hidden Extras
  • Fast Turnaround

SAP Calculations – The Process

(DESIGN SAP CALCULATIONS – Before You Start Building)

1

Send us your plans

Send us your plans and specifications, these should include details of floors, roofs, walls, windows, the primary heating system with associated controls, the hot water system with associated controls, any secondary heating, mechanical ventilation, fixed lighting and any renewables.

2

Pre Calculation Assessment

We assess all the information you have sent us. Sometimes there may be a few questions we’ll need to ask to help fill in any gaps. Wherever possible we try avoid our clients having to fill out long forms as most of the information we need is usually on the plans.

3

As Designed Assessment

Once we have all the information we require we model your design on SAP software, if it complies we will send you a detailed report and Predictive Energy Assessment which will satisfy your building control body. If your design fails don’t worry we’ll give you options that will ensure a pass.

(AS BUILT SAP CALCULATIONS AND EPC For Building Control Sign Off)

1

When you’ve finished your build

When you’ve completed your build contact us again. We’ll guide you through what further information we need and ask for confirmation that the Design SAP specifications were followed. (As a caveat, if you do wish to make changes it’s best to contact us first as specification changes can lead to compliance problems later.)

2

Certification

We will provide you with your EPC as well all the necessary reports and calculations to satisfy your building control body that you have complied with Part L of the building regulations.

CONTACT US

OFFICE: 01392 683664          MOBILE: 077968 46047        EMAIL: info@pecairsap.com

CORNWALL O DEVON O SOMERSET O DORSET O WILTSHIRE O GLOUCESTERSHIRE

[contact-form-7 id="32" title="Contact form 1"]

Tips For ‘New Build’ Compliance (Part L1A)



SAP calculations can be a mine field. No two projects are the same but there are similarities in how you can address improving fabric efficiencies and reducing co2 emissions. Considering the items below will give you a good start.

1

EXPERIENCE

Get in touch with an experienced SAP assessor as soon as you’ve finalised your design. Experience is the key and SAP assessing is a bit of a “dark art”. A good sap assessor will always be able to provide you with options that may ultimately save you money.

2

FABRIC FIRST

No matter how energy efficient your space and water heating specification or how much renewable energy you intend to install, failing the fabric calculation element of the SAP assessment will ultimately result in non compliance. Always take a fabric first approach.

3

THERMAL BRIDGING

It is hard to achieve fabric effeciency compliance without adhering to thermal bridge construction details. Accredited Construction Details are the most commonly used by SAP assessors but these are generic. Seeking construction details from the manufacters of the building products you use will yield far more favourable results.

4

THERMAL MASS

The constuction type of external and internal walls, floors and roofs can have a huge effect on SAP. Every internal surface of a dwelling has a capacity to store heat and is assessed within SAP. Interestingly, (and perhaps counterintuitivly), the more a surface can store heat the worse it performs within SAP.

5

HEATING CONTROLLERS

Always aim to install zonally controlled heating. This alone will be more effective than any other heating controller set up. 

6

AIR TIGHTNESS

The air tightness of a dwelling forms part of the overall fabric calculation. Choose a SAP assessor that has direct experience with air permeability testing as they will be able to advise you on how best to achieve the target you need to attain.

7

WINDOWS AND DOORS

Windows and doors are generally the most energy inefficient element that make up the fabric of a dwelling. Always choose the best you can afford. As well as sourcing products with low Uw values, choose suppliers that can provide detailed information about g values and the low emisitivity coatings  used on their glazing. 

8

CONSTRUCTION MATERIALS

Selecting cost effective high performace products will always pay dividends. For example standard lintles make up a large component of the total thermal bridge heat loss within a dwelling. Substituting standard lintles with thermally broken ones will significantly improve your fabric calculation.

Tips For Conversion Compliance (Part L1B)



Attaining Part L compliance for conversions is usually easier than for new builds. Existing heat loss elements (walls, floors, roofs) need to be upgraded if they fall below a certain u value and new heat loss elements need to achieve minimum u values. As a caveat there are many ‘grey areas’ and exemptions within the legislation that can apply. With this being the case it is important to make sure your building control officer is happy with the way you intend to convert the building. A good SAP assessor can give you all the advice you need.

1

EXPERIENCE

Get in touch with an experienced SAP assessor as soon as possible. One that has a thorough knowledge of Part L1b legislation.

2

BUILDING CONTROL

Make sure your building inspector is happy with you/your designers interpretation of Part L1b. There are many grey areas within the legislation, if part of your conversion falls into one of these grey area it is important that building control agree with your interperatation. 

3

EXISTING ELEMENTS

If required upgrade existing elements to the necessary u values as stated in Table 3 of Approved Document L1B unless the element falls into an exemption category or has a better u value than the threshold values shown in Table 3  .

4

NEW ELEMENTS

Build all new elements to at least the minimum required u values as set out within Table 2 of Approved Document L1B and make sure that new external doors and windows equal the u values as stated in Table 1 of the same document.

Top