Warm Roof Explained

What is a Warm Roof?

By placing insulation over the top of the roof structure, we form a warm roof.

The makeup of a cold roof is like sleeping on top of your quilt. Everything above the quilt is cold and everything below is warm. With the insulation under the roof covering, the roof is cold, hence the term Cold Roof.

The design process for a new warm roof should take in.

  • Can the roof be raised by the height without conflict.
  • What vapour barrier should be used.
  • What depth of insulation should be used.
  • What the chosen roofing membrane will be.

Warm Roof Construction

Warm roofs construction is one of the easiest methods of  insulating a roof, because the roof insulation is placed over the roof and not under it its accessibility and ease of laying  make it a relatively unskilled job.

A quick inspection by a qualified roofer to make sure all the joints between the insulation has been filled and away you go.

Grants For Warm Roofs

At the moment there are not grants for warm roofs installation however the vat for the installation has been dropped to 5% and if all the works undertaken on the flat roof are substantial then those works are also 5% vat.

How a Warm Flat Roof Works

In this video our Principal Estimator – Steven Dickinson outlines how a warm flat roof works and explains the known advantages and disadvantages of the system.

Installing a Insulation in a Warm Roof

Warm roof construction means taking large quantity of rigid insulation up onto your roof, therefor scaffolding is nearly alway needed for access, and to safeguard the roofers as they conduct their work.

The insulation itself is very safe  apart from the dust that is formed when we are cutting it there are now unknown  problems with the materials.

The most common rigid roof insulation used on warm roofs is a high performance rigid thermoset polyisocyanurate (PIR) insulation manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

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