You really really need to be sure you are comparing apples to apples here because there are many ways of doing ewi, some are excellent and some are, lets say, lacking.Has anyone got the external insulation into their external walls of their house , what was the total cost and what was the grant. looking to see if there is value getting a 3 bed semi built in the 97 more energy efficient. tks
there are many ways of doing ewi, some are excellent and some are, lets say, lacking.
Funny that, they're happy enough that the standard structural cover for the house itself is only 10 years and limited further to 5 years for certain issues, but expect EWI to last longer???One of them questioned that there is only a 15 year guarantee on the job and wondered what happens after that if anything goes wrong.
Funny that, they're happy enough that the standard structural cover for the house itself is only 10 years and limited further to 5 years for certain issues, but expect EWI to last longer???
It's going to depend on the house but agree on attic and windows etc. big advantage of EWI against internal dry lining is that you don't lose space or have to wreck the inside of the house. Also, once it's plastered and painted over, it can be a good way of literally covering over pebble dash.No particular expertise in this area but I get the overall impression that "bang for your buck" is poor for ewi compared to other possible spending, eg attic insulation, solar PV, doors and windows.
The creation of thermal bridges is one of the main considerations with adding insulation to a building and especially true for ewi. There are 3 places generally where these tb's occur; top of wall, bottom of wall and around windows & doors reveals. Thermal bridging not only allow excessive heat loss but also significantly increase the risk of mould internally. Therefore, thermal bridging should be designed out where possible. Depending on the building, you achieve this by extending the insulation down to the wall footing, up past the soffit to the top of the wall (and ensuring the roof insulation seamlessly meets the ewi) and move the window / door frames outwards to be overlapped by the ewi.Hi,
Can you elaborate on the good ways of doing this job. Spoke to 2 architects some time back and neither recommended it. One of them questioned that there is only a 15 year guarantee on the job and wondered what happens after that if anything goes wrong. I didn't get the time to question them for long on the merits etc.
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