Roof – Walls – Windows – Hot Works
The value of insulation should never be under-estimated because the average British building (business or home) loses 25-75% of the heat input through the roof, walls and floors.
This is a complete waste that can be almost totally eradicated.
Through the roof
There is almost no such thing as too much insulation – in your loft that is – having said that I recently had “too much insulation” delivered and it clogged up my shed for months until I off-loaded it on Aberdeenshire Freecycle which is great system where you can get rid of your unwanted items to someone who needs them without recourse to the landfill!!!! http://my.freecycle.org/
Around 20% of the heating energy put into a building can be saved by installing good loft insulation. Good = minimum 150mm glass fibre or sheep’s wool or blown recycled newspaper etc.
This is truly not rocket science. Really high quality loft insulation is available from all DIY stores and the fibre-glass stuff even comes now with plastic wrapping to avoid damaging your hands.
In an ideal world you can go “green” and use recycled materials or even sheep’s wool.
Wool can rapidly absorb and release moisture and so helps keep buildings cool in summer as well as warm in winter.
A typical house has a loft space of around 70m2 and insulation will cost you anything from £3/m2 for basic fibre glass up to £10/m2 for max thickness wool products.
So you are looking at spending up to £700 to cover the entire loft space.
I reckon 3-5 years payback in most houses with standard products. Get in touch if you have any queries or would like to obtain details of what and where to buy.
Through the Walls
The outer envelopes of a building can make a substantial contribution to reducing the amount of energy it uses through good thermal performance and air-tightness levels.
When it comes to retrofit of this type of insulation there are two options – Internal and External.
Bearing in mind that internal wall insulation reduces the size of the room most folk look to external wall insulation – EWI.
EWI also has two options – injected into the cavity or applied externally – the latter can dramatically improve the appearance of an older property.
Now I am not going to sell double glazing so please don’t worry although there is absolutely nothing wrong with double glazing – or even triple – and it should be fitted whenever and wherever possible to provide good thermal performance and security to any property.
However, double glazing is not cheap and in many cases not appropriate for structural, architectural, planning reasons and so on.
So what do you do if you find yourself in a traditional building for example with 4mm single glazing in hardwood frames but you want to reduce your heat losses?
Magnetic secondary glazing is a fantastic idea and is manufactured in Scotland so I can fly the flag.
Glaze and Save cuts the U-value of a single glazed window from 5.5 to 2.7 offering a 50% reduction in heat loss
I love this system – it is straightforward to install, can be taken down in summer to allow opening of windows – and it is about half the price or standard secondary glazing.
Give me a call if you want some more information.
Hot Works – Radiators & Pipes
Insulation behind radiators can cut the demand on a boiler by 10-12% and the simple reflective panels are easily installed.
If you see a hot pipe feeding a radiator or running through a treated space you have “wild heat” – totally uncontrollable. Wrap it. Simple. 85% energy saving.