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Watch this episode of ‘Can I Just Ask?’ to find out how to replace windows after internal wall insulation has already gone in. Ideally the existing building is made retrofit ready first, with the windows upgraded before any insulation work.…
In this video we look at what happens to internal wall insulation when a property floods. The real problem isn’t the water itself, it’s what the water brings in with it, and that changes what has to happen to the…
We all know the feeling of walking into a home that just feels right, but it’s harder to put your finger on why. Here’s an interesting one: two homes can be sitting at exactly the same internal temperature, yet one…
A tight retrofit budget means you can’t tackle everything at once, so knowing where wood fibre insulation earns its place first really matters. It’s one of the most common questions we get asked when someone’s approaching a project, and the…
After over 6 years of developing and honing the specification and the components within the NatureWall internal wall insulation system and 18 months of to-and-fro with KIWA, we are really proud to say we have now achieved our first BDA…
We scour the markets looking for new and innovative products and whilst we find some in the UK, quite often they lack the testing and technical documentation required for us to incorporate them in to our specifications. Thankfully, that has…
It’s a question that keeps coming up, and understandably so. When you start talking about internal wall insulation (IWI), moisture risk is never far behind. Somewhere along the line, the idea has taken hold that introducing a ventilated cavity between…
Retrofit projects often throw up variable specifications — sometimes something’s already been installed and you’re working around it, or there’s pressure to reduce overall build-up thickness. So can wood fibre insulation be combined with PIR or other synthetic insulations? In…
In this episode, Chris and Andy look at why positive input ventilation (PIV), despite being widely used in retrofit projects, generally isn’t recommended alongside internal wall insulation (IWI). Andy explains that PIV works by pressurising the indoor space to push…
Flat roofs are one of the most technically demanding roof types to get right, and the membrane you choose has a bigger impact on long-term performance than most people realise. In this episode of Can I Just Ask?, Chris and…
Internal wall insulation is one of the most common retrofit interventions in the UK, but it’s also one of the most frequently misapplied. A November report from DESNZ highlighted a failure rate of around 30% in IWI installed under government…