It’s a question we hear quite often here at Home Logic – how does the thickness of loft insulation affect heat loss? Secondly, how does heat loss affect your energy costs?
Household energy costs certainly seem to be going through the roof again, with recent energy price rises from at least one of the big suppliers announced. Most likely, the others will soon do the same.
Unfortunately, it’s not only energy prices that go through the roof – energy itself also heads off skywards, every single minute of the day. Our homes lose heat from just about every nook and cranny but, as heat rises, it makes its greatest escape through our lofts and rooftops.
This is why loft insulation is so important, to prevent this heat loss from occurring.
So how does the thickness of loft insulation affect heat loss? Let’s take a look at the whole situation from top to bottom…
How Does the Thickness of Loft Insulation Affect Heat Loss?
Many homes in the UK already have some form of loft insulation in place. The most traditional type of loft insulation is the fibreglass variety.
Today, however, an increasingly popular alternative – Home Logic Spray Foam – is available, and this outperforms traditional methods of loft insulation on several fronts.
But what are the recommended thicknesses involved, and how does the thickness of loft insulation affect heat loss overall?
The general recommended thickness of loft insulation in the UK is 270mm. This mainly stands for fibreglass and mineral wool alternatives to spray foam.However, the recommended thickness will change depending on the U-Value you wish to achieve. For example, to achieve a U-Value of 0.25W/m² you will typically need around 150mm of mineral wool, around 200m of fibreglass or 90mm or rigid insulation foam.
The Importance of Quantity
This quite clearly highlights the importance of quantity and provides a definite answer to the question – how does the thickness of loft insulation affect heat loss?
The thicker the insulation, the more effective it is at keeping heat from escaping through your roof. However, if your insulation is too thick, your house may have ventilation problems and be susceptible to damp, condensation and mould related issues.
The Importance of Quality
So the amount of insulation you have in place is important – but so is the quality of it! In fact, quality is always more important than quantity! When it comes to the ‘what it says on the tin’ stakes, spray foam is up there with the best of them.
It’s an expanding foam that is sprayed into your home, providing a super-solution to heat loss. No rocket science there. As it sets, the foam expands up to 100 times its initial size, creating a deep, thick layer of heavy duty insulation for your home. Again, pretty simple stuff!
Seamless Solutions – Literally
Most of us can probably picture a few immediate advantages to the installation process, compared to that of traditional fibreglass.
Spray foam is water blown into your loft (or other area to be insulated), and doesn’t involve a trail of workmen/women tramping dirt and unpleasant fibrous material through your home.
There’s very little disruption indeed when it comes to installation, and the process takes less time in most homes than laying several layers of fibrous insulation. The process is quick and seamless – literally seamless in this case – filling even the smallest of gaps, to cut heat loss and draughts.
Excellent Energy Efficiency
This is the most obvious advantage for most people: traditional loft insulation is a great way to reduce the cost of your domestic energy bill.
Home Logic Spray foam has a much greater energy efficiency rating when compared to more traditional methods, and can reduce energy costs by a substantial amount over time.
Spray foam won’t stop heat rising in your home, but it will be far more effective at creating a barrier between the inside and the outside of your property. The maths here is simple: less heat loss equals lower heating bills. Simple as that!
Now it’s starting to become clear how important the question is – how does the thickness of loft insulation affect heat loss?