Question regarding U-values

onlinemonkey

Hi I was just wondering if any body knew what the established procedure is for assessing the u-value of a wall in an older house where not much is known about the composition of the wall?

muffler

Is this for BER purposes?

sinnerboy

Log on to the SEI website and download the DEAP manual . Refer to Appendix S

No6

Download Part L, there's examples of how to calculate U Values if you know the wall build up. However if you are doing it for BER purposes unless you have proof of the build up you must use defaults from the Deap manual appendix S

onlinemonkey

Thanks for the replys. Im researching a fyp and Ive read the sei docs. What Im wondering is do people use mvasive methods such as drilling a hole and having a look with a camera of do they just stick to the sei docs? If they do use invasive methods do you know of any ways that are in use?

sinnerboy

Rarely if its just a matter of issuing a BER cert . But if someone is spending €1000s on a refurb / extension, then yes the existing constsruction is typically partially demolished .

In fact refurbish / alterations often involve minor demolitions ( widen window - form new external door etc ) so a detailed wall construction spec can be determined

onlinemonkey

sinnerboy wrote: »

Rarely if its just a matter of issuing a BER cert . But if someone is spending €1000s on a refurb / extension, then yes the existing constsruction is typically partially demolished .

In fact refurbish / alterations often involve minor demolitions ( widen window - form new external door etc ) so a detailed wall construction spec can be determined

Thanks sinnerboy

Bosco1

Sometimes the look in where the ESB box is - quite often there will be a gap you can see through to give you some idea..