The basis for this simple but effective solution is natural air pressure.
How to insulate concrete flat roof.
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 covering grp or epdm.
The roof on the other hand is just a single slab of concrete prob about 5 thick.
During the summer it is much hotter in this room.
Internally there isn t enough headroom to insulate the roof.
Green roofs a green sedum or grass roof can also be put onto a flat roof provided it can take the weight.
Insulation is placed in between the joists underneath the roof surface above.
This is then covered with a further weatherproofing layer.
Paroc air keeps the roof structure dry without any mechanical systems.
Install a vapour control layer over the screeded concrete deck.
Lay the quinn.
Cold roof a very bad idea.
A polyethylene sheet of a minimum 1 000 gauge 250µm.
With a warm roof the usual process is to split the insulation into two layers.
Sealing bypasses bypasses are anywhere that there is a break in the insulation.
If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters.
There are two main types of flat roof that require different approaches to installation.
Warm deck construction 1.
How to install insulation in a flat roof with a concrete deck.
Apply a layer of screed over the concrete deck and allow to dry fully.
Insulation material is placed on top of the roof rather than in between the ceiling and the decking.
To produce a hot roof rigid insulation is fitted outside above the weatherproofing.
Effective roof insulation has three or four insulation layers.
Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation.
With flat roof insulation a vapor barrier should sit between the joists and ceiling panels and the insulation on top.
From what i can tell the walls are the same as the rest of the house and not just a single brick skin.
Paroc air is a simple and safe solution for making dry flat roofs.
