Insulating A Concrete Slab Roof

Ideal for use in commercial and residential construction quad deck combines the strength security and reliability of reinforced concrete with the energy efficiency fast construction and comfort of insulating concrete forms.

Insulating a concrete slab roof.

Before giving a specific answer we should point out that it is normally uneconomical to use insulation under the whole slab. Quinn therm qrfr ffr insulation is a foil faced insulation board which helps further improve the thermal performance to help achieve the desired u value. Effective roof insulation has three or four insulation layers. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.

Cold roof a very bad idea. Placing the 4 inch concrete slab was routine and after the concrete had cured framing the exterior walls could begin. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation.

Can you give me an r value. Insulating a slab on grade depends on at least four factors. A solid slab of concrete capping the top of your house. There are a number of quinn therm roof insulation boards which will suit a warm deck flat roof construction built with a concrete deck each with different facings.

Martin holladay explains insulating a slab on grade in the energy smart details department. About the only out of the ordinary thing for the framers was temporarily raising the threshold of the front entry with two 2 by layers. How much good can i get out of perlite or vermiculite concrete as an insulating material under a slab on ground for my house. Exact specifications vary but most concrete roofs are several inches thick.

The concrete roof insulation waterproofing challenge commercial residential concrete roof slabs are not only expensive to build but they are also costly to maintain. Creating a void between the old ceiling and new is better but ideally you need to eventually consider insulating the top of the concrete roof with solid insulation and a better. It didn t take long for the framers to build and raise the exterior walls. Due to the continuous stone wool base the vapour barrier remains intact even during small structural movements.

The vapour barrier prevents moist air from leaking into the insulation layer. Flat concrete roofs are generally not ventilated since the ceiling internally is generally a plaster and skim coat directly to the underside of the cold concrete. Of course it doesn t have to be that way if the concrete slab is insulated properly and this can be done on new builds or on existing concrete roof slabs. A concrete roof is exactly what it sounds like.

This is then covered with a further weatherproofing layer. As long ago as 1945 the national bureau of standards reported in its bms report 103 that the.