When it comes to industrial and commercial flat roof construction, the choice between cold flat roof construction and warm flat roof construction is more than a technical detail, it’s an important factor which can affect thermal performance, longevity, maintenance, and operational efficiency. Whether you’re managing a warehouse refurbishment, planning a new retail build, or upgrading an industrial facility, understanding the distinction between cold and warm flat roofs is critical.
In this article, we will explore both types of flat roofing systems to help you understand the differences between the two.
What Is Warm Flat Roof Construction?
Warm flat roof construction is the preferred method in modern commercial and industrial settings due to its superior thermal performance and simplicity of design. In this setup, insulation is installed above the deck, just beneath the waterproofing layer. This keeps the entire roof structure, including the deck, within the insulated envelope, minimising cold bridging and reducing condensation risks.
A standard warm flat roof construction detail includes a durable waterproof membrane, installed on top of rigid insulation boards. Below the insulation lies a vapour control layer, which prevents warm, moist internal air from entering the roof system. The base is typically a concrete or metal deck, common in large-scale commercial builds.
What Is Cold Flat Roof Construction?
Cold roof construction flat roof systems place the insulation below the roof deck, between the structural joists or purlins. This leaves the roof deck exposed to outside air, meaning it can become cold in winter. Without proper detailing, this temperature difference often leads to condensation on the underside of the deck which can be especially problematic in heated or humid commercial environments.
A typical cold flat roof construction setup consists of a waterproof membrane applied over the roof deck, with a ventilated cavity below, followed by insulation installed between internal ceiling joists. A vapour barrier is then placed beneath the insulation to protect against moisture from within the building.
Flat Roof Construction Cost
If you’re looking for a flat roof construction cost, a professional flat roof contractor will be able to help support you with finding the right roof system for your needs.
Choosing a Flat Roof Construction Contractor
Here at Premierseal, we provide accurate costs on flat roof construction depending on your project requirements. Our team of experts will work with you to understand your requirements and advise on the best flat roof construction system for your needs. If you’d like to request a quote then contact us today.