Users' questions

How do you insulate a dormer?

How do you insulate a dormer?

How to Insulate a Dormer Roof…

  1. The first method is to use rigid insulation. This method requires the use of 150mm thick insulation between the rafters and a 50mm air gap to prevent cold bridging occurring.
  2. The second option is to use mineral wool insulation.
  3. The third option is to use spray foam insulation.

How much does it cost to insulate dormer walls?

To achieve a ‘U’ value of 0.35W/m²K for the dormer cheeks and for the side walls between the room and the unheated roof void, mineral fibre insulation at least 125mm thick, or 90mm rigid urethane foam will be sufficient.

What is a dormer cheek?

A dormer is generally constructed from timber. The main parts that form a dormer are the roof, side walls (cheeks) and front wall which faces the garden. The cheeks can be supported in one of two ways: The rafters can be doubled and bolted together with the cheeks then constructed off the rafters.

Do you need a gap with Kingspan?

The timbers must be deep enough to allow the desired thickness of Kingspan Kooltherm K112 Framing Board to be fitted between them along with a 25 mm (min.) air gap between the insulation layer and the brick wall. Once the boards are installed, Kingspan Kooltherm K118 Insulated Plasterboard can be fixed to the battens.

What kind of insulation to use on dormer cheeks?

Our range of premium performance dormer insulation products are suitable for use in dormer cheeks. We also have a range of flat and pitched roof products which can be used to insulate the roof of a dormer. Simple to handle and install, these are suitable for both new build, extention and refurbishment projects.

How long has Kingspan insulation been in business?

We have been supplying home insulation and insulation for commercial projects all across Ireland for over 40 years. We offer a wide range of optimum performance, premium, and high-performance insulation products, including wall insulation boards, roof insulation boards, and floor insulation boards.

What underpins fire performance of Kingspan insulated panels?

Kingspan is dedicated to providing high-performance, innovative insulated panel solutions that not only deliver superior construction efficiencies and lifetime performance, but that are underpinned by extensive system fire testing and demonstrated fire performance. What Underpins the Fire Performance of Kingspan Insulated Panels?

What kind of roof does Kingspan Century use?

Whether you decide upon a Truss or Panelled Roof, Kingspan Century include prefabricated Dormer assemblies with all of our roof systems and we have a solution for every configuration of dormer design.