Insulating Existing Concrete Flat Roof

I ve built a timber frame to support a new plasterboard ceiling below the existing one.

Insulating existing concrete flat roof.

With an inverted warm roof construction put ballast usually graded pebbles or concrete paving slabs on top of the insulation in order to keep the insulation down in the event of wind. There is only a small gap between this ceiling and a concrete roof cold roof felt covered. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation. Green roofs a green sedum or grass roof can also be put onto a flat roof provided it can take the weight.

Here we share the most common mistakes people make when installing flat roofing insulation. To insulate a flat roof with a concrete deck we recommend a warm deck construction method where the vapour control layer is sandwiched between the concrete deck and a layer of rigid pir insulation boards. Roof types the various types of roofs found on homes sheds garages and other buildings fall into one of the following categories. I want to insulate below a flat roof without removing the existing ceiling.

The type that is right for your flat roof insulation job depends upon the state of the roof expert opinion on the best type and your budget. This is then covered with a further weatherproofing layer. Refurbishing an existing timber joisted flat roof which has no insulation. This is used for refurbishment e g.

Cold roof a very bad idea. Insulation is placed in between the joists underneath the roof surface above. Both these variants require different approaches to insulation which will be covered in this guide. A cold flat roof is one where the insulation is between or between and below the roof joists.

The insulation is below the deck but above the plasterboard. The existing ceiling is sound but provides no insulation. Insulation material is placed on top of the roof rather than in between the ceiling and the decking. Roofing insulation is one of the most important and misunderstood building components.

Gable roofs hip roofs intersecting roofs butterfly roofs mansard. There are many different types and installation methods out there along with a lot misinformation about which products offer the greatest energy savings. How to insulate a flat roof. With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same.