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Should There Be Insulation Between Floors?

Should There Be Insulation Between Floors

Insulation is a huge aspect of your building thermal efficiency. Usually, when it comes to insulation, the most critical area is the roof and the walls. But people often forget there are other parts of the home that need insulation.

One of the more common questions clients ask is should there be insulation between floors. There are valid reasons for why not, and reasons for why there should be insulation. But even more importantly, you need to know what type of insulation is good for your floors.

With that in mind, let’s break the reasons for and against heatproofing your floor:

Reasons For Heatproofing Insulation Between Floors

For all the valid reasons not to add insulation, there are also reasons when you need insulation. Let’s look at the yes answer for should there be insulation between floors.

Here are some situations when you need floor insulation:

– If the floor is above a cold space, you need insulation. Some examples include vented crawl space and unheated garage

– You need insulation between and over the floor joists when you are dealing with an unfinished attic space. This will seal off living space below

– If the room is cantilevered beyond the exterior wall bellow, you need floor insulation

– Slab floors build directly on the ground need insulation

– When your objective is to reduce sound and noise transfer between floors, insulation is the logical answer and solution to the problem

Reasons Against Heatproofing Your Floor

The main reason why you do not need insulation on the floors is simple. The floor does not belong in the building envelope. Sometimes, adding insulation to the floor can cause problems for your home. Floor insulation can hamper the dynamic of vapour barriers and thermal resistance. 

The biggest concern that can happen due to floor insulation is mould. Floor insulation can sometimes reduce the room temperature below the dew point. In that case, even a dehumidifier cannot handle the moisture load.

Therefore, it is crucial that you always consult an insulation expert before adding insulation to your floors. A certified professional will be able to make the call regarding whether your home needs insulation between floors or not.

Even more importantly, a certified insulation contractor will know exactly how and where to put insulation and not hamper the building thermal envelope. There are many factors that contribute to going yes or no for insulation between floors.

Should There Be Insulation Between Floors

What Type Of Floor Insulation Should You Use?

As mentioned in the beginning, it is not just important to answer should there be insulation between floors, but what type of insulation as well. In the UK, most of us live in a cold climate. We are no strangers to cold concrete floors in the winter.

In addition to being cold, concrete floors are also full of moisture and present a long-term maintenance problem. The solution is to add insulation, and we firmly believe spray foam insulation is the best option overall.

And if you are feeling a bit overwhelmed by all the options, and the process of installing insulation, you may want to consider hiring a licensed contractor. As for spray foam, here are some of the benefits.

Spray foam has an expansive nature, which allows the product to seal all gaps, cracks, and nooks. When applied, spray foam expands up to 100 times its nature. Because of its expansive nature, spray foam requires less material for more insulation.

And by sealing all gaps, spray foam will provide a true soundproof barrier between floors. We mentioned earlier that one of the reasons you need to insulate between floors is make them more soundproof.

But more importantly, spray foam insulation will provide great thermal efficiency. If your second floor is above a cold and unheated area, like the garage, for example, spray foam will take care of those cold floors that are uncomfortable in the Winter.

Discover more of the brilliant benefits of this multi-purpose product, by simply clicking the button below!