Waterproofing Terrace Roofs (without Foot Traffic and with Thermal Insulation)
Scrape off any loose concrete particles. Sweep the surface thoroughly and remove all the dust, dirt and residues.
Prime the whole surface with Emilkote and leave to dry for at least 4-5 hours (Figure 1). Fill the large cracks with Emulderz Joint Filling Paste (Figure 2) or Emulzer Bitumen Mastic. Any hollows can be levelled by using Elastokote 2K.
Elastokote 2K can be applied when Emilkote is completely dry. Before Elastokote 2K dries up 50gr/m² geo-textile felt or fiber glass is laid with 10 cm overlap at seams, and pressed. (Figure 3) These materials prevent the cracks which may form on the concrete or alum in time from being transmitted to the insulation layer. Apply 2 or 3 more coats of Elastokote 2K, allowing each coat to dry up completely before the next coat is applied.
When the bituminous coats are completely dry, EPS or XPS thermal insulation boards are mounted. Mounting these boards are as easy as putting them together side by side. 100gr/m² geotextile felt is applied onto thermal insulation boards as a separator coat.
And then gravel is spread as a top coat to protect the insulation boards from wind as well as from the harmful effects of sun.
Gravel and insulation boards can be removed in case of a future repairment, and any damages on the roof insulation can be repaired by using Elastokote and felt.