Flat Roof Insulation Systems
When it comes to flat roof insulation systems, there are wrong ways, and right ways to insulate them. The first questions that come to mind when people think of insulating a flat roof is where, and how.
The answers to these questions are very important. Especially when your flat roof is located in a room that generates high levels of humidity, such as the bathroom.
There are many ways to insulate a flat roof, or a low-slope roof. The problem is, most of them are wrong.
Some of the usual methods include fiberglass or cellulose on top of the leaky ceiling. People leave a gap of a few inches between the top of the insulation and the roof sheathing. And while this system will work in most cases, there are much better options.
Let’s look at your flat roof insulation systems options, as well as why you should start such a project in the first place…
Why Insulate A Flat Roof?
Flat roofs are usually found in bathrooms and other type of extensions. They are not the best of ideas. Flat roofs lose heat, they are prone to leaking, and most importantly of all, they cause the materials to deteriorate over time.
Many houses suffer from the same problem. When you think of insulating a flat roof, it is better to replace the roof covering instead. Your second most important task is to understand how to keep it airtight and prevent condensation.
Types Of Flat Roof
Depending on the roof type your property possesses, you need to consider how to insulate, where to insulate, and the thickness required. Let’s look at the two main types of flat roof:
Cold Flat Roof
Most of the traditional flat roofs belong in the “cold roof” construction category. Cold roofs usually have a vapour control layer in the ceiling, and cross ventilation at the eaves, or sometimes on the top of the walls.
These features help with condensation. However, this roof type encourages heat loss; so much so that the system was banned in Scotland.
Warm Flat Roof
In this case, the insulation can be placed below the weather proof membrane. The construction is called “warm roof deck construction”.
You can also place insulation above the waterproof membrane, which is referred to as the “inverted warm deck”.