It is becoming more and more common for people to ask us about floor insulation. Having your wooden floor insulated not only eliminates draughts and makes the room warmer and cosier, but also saves money in the long run by cutting down on heating bills.
The bulk of our under-floor insulation work we’re asked to do is carried out under old pine flooring. Although stripped pine floorboards look lovely, they have a tendency of being very draughty and cold as well. To combat this, we would always recommend filling the gaps in your floorboards with Draughtex (rubber gap filler) which could save £40 a year alone, based on a room that’s 12 square meters. By adding insulation into the mix, you could potentially double that saving, as well as making the room a much more comfortable environment to be in.
If you’re lucky enough to have a cellar, then the insulation process is much more straightforward. We’ve completed several jobs where there’s a large enough gap to simply get under the floor ourselves. While it’s not the most glamorous of jobs, with the dust, dirt and thick cobwebs that build up, the less of the floor that’s taken up the better.
In most cases, when there’s no cellar and not enough room to get under the floor ourselves, enough of the floor will need to be removed to get a breathable membrane fitted under the joists, which acts as a cradle for the insulation. We’ve found 140mm thick Thermafleece cosywool insulation to be the best as, on top of its superb insulation qualities, it can easily be fitted around pipes and hard to reach areas. Rigid insulation board can also be used as an alternative, but we find cosywool provides far better coverage thanks to its ability to fit into every nook and cranny.
It’s very important not to block the airflow under a house that has suspended floors as this can lead to damp and dry rot, which would be a very expensive mistake.
From a budget point of view you’re normally looking at around £50 per square meter to insulate, based on a 25-square meter area, but prices can vary from property to property based on how much work is involved. Once the floor is re-laid it will almost certainly need sanding and finishing, which we can do for you as well.
If you need any help or advice, give us a call on 01962 733016, email firstname.lastname@example.org or visit our workshop to discuss further or arrange a no-obligation estimate for the works involved.