Warm Flat Roof Insulation Cost

While expensive the best insulation is polyiso rigid foam.

Warm flat roof insulation cost.

Since 2005 if you replace 25 or more of your roof covering felt then you need to ensure that the entire flat roof has enough insulation to satisfy current building regulations. It is top quality and the most cost effective product for your flat roof. With a warm roof the insulation is installed on top of the existing surface rather than in between the rafters. Flat roof cost per square metre.

Warm deck or warm roof has insulation above the roof deck the panel underneath the roofing material that s usually made of wood. This method is especially applied to existing flat roofs which are restricted to a certain height. For a 1 inch board equivalent of 6 r value. For bay window roofs expect to pay from 350 900 and for dormer window roofs between 700 1 300.

You can expect to pay about 55 100 sq ft. Warm roofs offer a superior thermal performance and therefore come with a higher cost. Inverted roofs are a type of warm flat roof where the insulation is above the waterproofing layer. The insulation is placed underneath the roof covering and the roof construction.

We recommend having at least 20 r value worth of material for optimal energy efficiency. The exact material you use will have an impact on the cost of the roof with basic felt solutions costing around 50 per square metre for the material itself and more high end materials such as modern grp a form of fibreglass going up to 90 per square metre but allowing unlimited options in terms of colour and generally being more long lasting. Installing a warm roof can be extremely straight forward and simple to do. A cold flat roof is insulated from the inside.

This way you will get the most out of your insulation. Cost of a warm flat roof. There are three types of insulation for flat roofs and a professional should help you to decide which one is best for you. Warm or cold deck insulation can cost around 35 per square metre not too dissimilar from other roof insulation prices however exterior insulation is more expensive and can cost around 80 per square metre.

More details can be seen in the table below. Flat roof replacement costs. It s recommended in damp and cold areas such as the uk. Flat roof extensions cost from 700 lowest possible and can reach up to 3 000.

You can opt for a so called cold or warm flat roof. This only applies to flat roofs over habitable parts of your home so it excludes garages sheds some porches and most door canopies. In case of a warm roof your roof is part of the insulation shell.