New Extension Roof Insulation

Column a is for extensions where the existing dwelling s walls and roof u values are worse than 0 70 w m k in the walls and worse than 0 25 w m k in the ceiling.

New extension roof insulation.

Be able to support loads weights provide resistance to heat loss insulation be ventilated to protect from condensation in most cases have adequate drainage. Kingspan with a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. Column b is for other extensions upgraded existing thermal elements non exempt conservatories and conversion of unheated buildings. Flat roof replacement costs.

This approach can be used to create an unventilated roof structure helping to keep out unwanted drafts. Insulating along the sloping rafters forms a warm roof and is an option for both new builds and refurbishment projects. Resist the spread of fire from one property to another. The extension will be 3 5x6x3 5m.

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. Whether you re doing a weekend fix or folding it into a bigger home renovation insulating your roof will pay off for years to come. Choose feldco roofing for your brand new roof. Warm deck this is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation.

A u value of 0 20w m k or better is required and that means either 110mm rigid insulation or 170mm of mineral wool or other natural wool. The best way to insulate a pitched roof is by installing insulation between and above the rafters. As there s no insulation below rafters headroom is maximised creating more useable space. There are two ways to insulate a roof.

Insulation puts the money back in your pocket by protecting your home from the elements and lowering energy costs. I will be building an extension to the rear of my property shortly and will be having a lean to roof with pitched roof inside with two sky lights. A new roof e g. Insulation options for a new build a u value better than the building regulations minimum will be needed to meet the new demands of a sap assessment.

How does this ceiling have to be insulated and what sort of materials will i need. No ventilation is required for these types of roofs. On new build or replacement pitched roofs the ideal build up would be insulation fitted over and then between the rafters giving a big boost for airtightness image credit.