Experts have revealed why new build homes are struggling to cope in the searing heat as parts of Britain are gripped by a 34C heatwave.
Eco measures put in place to keep properties insulated are being blamed on turning them into sweltering boxes during the summer.
Residents living in new build flats have seen their thermostats hit sweltering temperatures, as amber heat health alerts come into place for huge swathes of the UK until tomorrow.
Tenants have described conditions as ‘unbearable’, with teacher Sandra Monteiro, 41, not seeing the temperature inside her 11th-floor flat in east London dip below 27C for the last two months.
Building expert Lorraine Thomas told the Daily Mail that fire resistant insulation has added extra layers to buildings already quite energy efficient and said the more flats piled in to blocks, the hotter each home will be.
The extra insulation and thick windows mean in the winter some people do not even have to put their heating on.
But when the mercury rises the same insulation is causing them to heat up to extreme levels with people told investing in expensive air conditioning units their only option to cool off.
Residents in new build flats like the Three Waters, in Bow, east London, are complaining their homes are unbearably hot as they struggle with 35C temperatures
As the UK battles its fourth heatwave, London flat owners are struggling with high temperatures inside, leaving them feeling ill and exhuasted
In Leaside Lock, Tower Hamlets, residents say they are unable to sleep at night because of rooms reaching 27C and with windows only open a fraction, there is little relief
Ms Monteiro told the Guardian that conditions in her flat had left her feeling ‘out of breath’ and ‘exhausted’, with it also causing her frequent headaches.
Lucian Ho, 21, who lives on one of the top floors of a 28-storey high rise, said he struggles to sleep because of the heat and his only source of relief is an open window offering little in the way of fresh air or a breeze.
Meanwhile, those living in a nearby block of flats in Three Waters have seen their thermostats reach almost 30C.
Ms Thomas, the director of property company View From My Window, said: ‘Windows were put in these flats to provide natural daylight but what’s happened is a conservatory effect where it’s hotter in summer and colder in winter.
‘The size of windows were designed to save on bills but now they are too hot.’
The building expert also attributed London‘s dense population to hotter flats, explaining that many of the high rises built now are close to roads, bus routes, train lines and commercial buildings with lots of traffic and footfall and limited green spaces.
Ms Thomas added: ‘Dense population and area, there’s nothing sparse and the overcrowding of blocks with too many flats – it all helps to capture the heat.’
The company owner explained that the only way for homeowners to cool off was to invest in air conditioning, explaining that new build windows are designed with health and safety in mind and don’t open very far limiting through drafts.
‘More and more people will have to get air conditioning because opening windows just doesn’t do enough to help,’ she said.
Last year residents in Leaside Lock, in east London, put up desperate signs in their windows as they struggled with extreme temperatures (pictured)
Some flat owners have said their homes are so hot they won’t even turn on the oven and have resorted to eating rotisserie chicken and salad in parks and along the river bank (File image)
Community groups on social media have also become a hive of activity with residents in Greenwich desperately asking for tips to help them beat the heat.
One local asked: ‘Is anyone else struggling in their new build flat with the heat? I just moved into one recently and the heat is unbearable. Even with the windows opened and a fan. Any tips for coping in the summer living in a new build please?’
And their neighbours were quick to offer suggestions including pulling down the blinds and buying air conditioning units.
But others were just as frustrated, commenting under the original post that the flats are ‘awful’.
Talie Eid said: ‘Honestly, they’re awful. Never warm enough in winter (we don’t have standard radiators) and too hot in summer. Keeping blinds/curtains closed during peak time does help a little. We ended up getting an air cooler as fans not enough.’
While another said they had moved from a Victorian-era house to a new build and regretted the change, adding their new flat was affecting their mental health.
They wrote: ‘It’s actually starting to affect my health and the health of my pets. I’ve always lived in a Victorian and made a big mistake moving into a new build. It’s unbearable. I feel for everyone who is going through this. It’s horrible.
‘They build them quick. Charge high rent but don’t build them properly with good ventilation. It’s very frustrating.’
Peter Veress suggested the only way to escape the heat was to splash the cash and invest in an air conditioning unit.
He said: ‘I was living in a flat a few years back, and in our living room in summer the temperature went up to 37 degrees even though curtains were always closed during the day.
People shielding themselves from the sun in London as the UK is battles its fourth heatwave with health alerts in force amid water shortages in England
‘We bought an Aircon for around £300 and that was helpful when it was running, but as soon we switched off, you felt the heat. As others said, it’s summer. Without an aircon in a flat you are cooked.’
Another resident said that her and her family simply stopped cooking during the summer, preferring to eat rotisserie chicken and salad on the river bank than make their flat hotter by turning on the oven.
But the problem isn’t new and Londoners have been seeking advice and ways to mitigate the extreme temperatures inside their flats for a few years.
A Reddit thread from 2023 saw one homeowner who had recently moved to their new build flat complain of only having two windows which open ‘a few inches’.
The homeowner said their flat could easily reach 28.5C and even at 3am they had seen their thermostat jump up to 27C.
In the post they wrote: ‘I moved into a new built flat a few months ago and while everything was great at the beginning, I’ve currently run into a bit of an issue in this weather.
‘Basically the flat has windows on only one side in two separate rooms (living room and bedroom) and as such there’s little to no draft. The window in the bedroom only opens a few inches as well making it even worse.
‘Currently, while it’s a lovely 21 degrees outside here in London, my flat is at a less lovely 28.5 degrees. Even at night, at 3AM I checked the thermostat, the temperature was still 27 degrees.
‘I haven’t been able to sleep properly for over a week and last night I only slept an hour maybe. I just can’t seem to sleep properly because of the heat.
‘I’ve got a fan and an air cooler that I put water and ice blocks in so it fans cooler air around the room. Still, the temperature didn’t drop below 27 degrees and I’m at my wits end.
‘I can’t install an air conditioner I think as there’s no space on the outside of the building (and the housing association doesn’t allow it) so I’m trying to figure out what to do or I’m going to have to crash on a friends couch for the next couple of days.
‘Another issue that’s adding to the misery is the fact that the flat backs out onto a busy railway and there are probably 50+ trains passing per hour from 4:30 AM until 1 AM.
‘The windows are soundproofed well so the noise isn’t a problem when I keep everything shut, but the moment I try and air out the heat, I’m greeted with constant noise that a normal human being wouldn’t be able to sleep through.’
