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Newly completed flat roofs with vents and a brick elevation, seen from scaffolding

Flat roofing · Warm roofs

A warmer flat roof, built around your home

A warm roof places insulation above the roof deck and beneath the waterproofing. Done as part of a planned refurbishment, it can reduce heat loss through the roof.

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Overview

In a warm roof, the insulation sits on top of the roof deck, under the new waterproofing. It is a good way to improve the thermal performance of an existing flat roof when it is due for refurbishment.

Adding insulation raises the roof, so the detail matters. Before recommending anything, we assess the existing roof, the drainage, the upstands and the door thresholds.

The build-up and detailing are then designed for your property, and finished with a waterproofing system that suits it.

Why choose it

The benefits of warm roofs

  • Better insulation

    Insulation above the deck keeps the structure on the warm side.

  • Reduced heat loss

    A more comfortable room below and less heat escaping through the roof.

  • A complete upgrade

    New insulation and new waterproofing in one planned job.

  • Designed for your home

    We check drainage, upstands and thresholds before we specify.

Recent work

Warm roofs by Protec

How it works

Simple, from survey to guarantee.

Every job starts with a free specialist survey and ends with a written guarantee.

  1. 01

    Free survey

    A flat roofing specialist visits, inspects the roof, drainage and detailing, and listens to what you need.

  2. 02

    Clear quotation

    A written, no-obligation quote within 48 hours, with the system we recommend and why.

  3. 03

    Installed by our team

    Our own trained roofers do the work. No subcontractors. Watertight before we leave site each day.

  4. 04

    Guaranteed

    Guarantees of up to 20 years, with insurance-backed manufacturer warranties available on most systems.

FAQs

Warm roofs: your questions

What is the difference between a warm roof and a cold roof?
In a warm roof the insulation sits above the deck, under the waterproofing. In a cold roof it sits below the deck, between the joists. We will explain which approach suits your roof.
Will a warm roof affect my doors or windows?
It can, because insulation adds height. That is why we check door thresholds, upstands and drainage before recommending a build-up.
Can you upgrade my existing flat roof to a warm roof?
In many cases, yes, as part of a planned refurbishment. Book a survey and we will look at the existing roof and talk you through the options.

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