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Rooftop thermal insulation

Rooftop thermal insulation - Inverted insulation

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In the case of inverted roof top insulation the waterproofing is placed beneath the thermal insulation layer. In “open type” insulations, thermal insulation materials are exposed to water on rainy days and this results in the temporary decrease in the thermal insulation capability.

Inverted insulation is usually recommended for rooftops where discharge flows or even waterproofing is already installed and an affordable thermal insulation method is sought after.

Application method:

  • Surface is diligently cleaned and evened out by scraping off protruding or loose mortar and small depressions are repaired.

  • Primer is applied to the entire length and width of the area that is to be waterproofed using asphalt varnish Primer (solvent-based). This varnish enhances the adhesion of the bituminous sheet to the underlay and prevents it from peeling away at the edges.

  • This is followed by the thermal adhesion of the Dien Energy ++ bituminous sheet, superior quality, (SBS), weight6 kgs, with an upper layer ofwhite mineral tile, and elasticity at -20 °C and  180 gr spun bond polyester reinforcement. The thermal adhesion of the bituminous sheet to the underlay is done using the appropriate open-flame torch. The bituminous sheets are adhered in parallel to one another in order to ensure that water flows freely. The overlapping of the bituminous sheets in 10 centimetres lengthwise and at least 15 centimetres at the ends. During adhesion, the overlapping bituminous sheets are pressed lightly until the fusion of the material emerges at the joint; this is evidence that the adhesion of the bituminous sheets has been sealed. We extend 18 to 20 centimetres up the parapet and on occasion we cover the entire parapet. Specially-shaped bituminous sheet pieces are placed on solar panels, tanks, pipe sleeves, downspouts, pipes, as well as all the vulnerable points.

  • The insulation is strengthened with the application of an elastoplastic acrylic and polyurethane sealant, along all the edges, at the point where the edge of the bituminous sheet meets the parapet or wall. This method essentially eliminates any chance of the bituminous sheet detaching all the edge despite the strain it is under. These are materials with high elasticity and maximum resistance to UV radiation (-20°C ~ 90°C ).

  • Installation of extruded polystyrene thermal insulation tiles Dow, at least 5 centimetres thick.

  • Installation of 200 gr geotextile to protect the thermal insulation material and to separate it from the final coating.

  • Placement of gravel or pebble or free slabs or composite thermal insulating tile (Polytile by Dow).

Optionally:

  • Based on national standards, a second layer of bituminous sheet which is installed parallel to the first layer with a 50 cm shift is optionally recommended for further reinforcement of all roof top insulations.

  • It is possible for the drainage membrane (extruded polyethylene sheets with a cross-sectional dimension of 6 mm - HDPE) to be applied to the thermal insulation layer, so that the thermal insulation materials come into contact with as little as rainwater possible.

Σχετικά αρχεία
Dow Styrofoam.pdf Dop_Dien Energy ++ PF 6 kg_1.pdf

Indicative projects

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Rooftop thermal insulation - Inverted insulation - Rooftop thermal insulation with final protection free slabs - Goumas Insulations - Monoseis Goumas
Rooftop thermal insulation - Inverted insulation - Rooftop thermal insulation with final protection free slabs - Goumas Insulations - Monoseis Goumas Rooftop thermal insulation - Inverted insulation - Rooftop thermal insulation with final protection free slabs - Goumas Insulations - Monoseis Goumas
Rooftop thermal insulation Rooftop thermal insulation

Rooftop thermal insulation - Inverted insulation

Rooftop thermal insulation with final protection free slabs
Rooftop Thermal Insulation - Inverted insulation - Installation of gravel or pebble - Goumas Insulations - Monoseis Goumas
Rooftop Thermal Insulation - Inverted insulation - Installation of gravel or pebble - Goumas Insulations - Monoseis Goumas Rooftop Thermal Insulation - Inverted insulation - Installation of gravel or pebble - Goumas Insulations - Monoseis Goumas Rooftop Thermal Insulation - Inverted insulation - Installation of gravel or pebble - Goumas Insulations - Monoseis Goumas
Rooftop thermal insulation Rooftop thermal insulation

Rooftop Thermal Insulation - Inverted insulation

Installation of gravel or pebble

The benefits of inverted rooftop insulation:

  • Inverted rooftop insulation offers satisfactory thermal insulation.

  • The existing rooftop waterproofing is protected from ageing and thermal strain.

  • The thermal insulation layer can be reused in case of a building addition or extension.

  • It is affordable and the construction cost is amortised within five years.

Customer reviews for our Thermal Insulations

5.0
44 Reviews
Organisation, consistency and respect to the customer.
Organisation, consistency and respect to the customer. Great knowledge of the field by the work crews that carried out the job and communication, they give the impression of a trained military unit. Diligent work using the best materials on the market. Mr. Goumas was always available to resolve any problem that arose, to diligently inspect all the works, a perfectionist who loves technically correct work! Truly a company that stands out in the field from start to finish; well organised and with excellent performance. Our congratulations. We thank you very much and wish you good health so that you can deliver “works of art”!
Panagiotis Pipinis
13 May 2021
Consistency and courtesy...
Consistency, courtesy and the quality of the work with good partners. The only thing I can say is thank you!
Christina Paschaligkou
16 Mar 2021
Professional and beautiful result...
I strongly recommend the insulation work by Mr. Goumas for the following reasons: A) immediacy of response with an on site visit of the insulation area. In other words, he did not send a “representative”. b) honesty with the potential customer. Personally, we got out of unnecessary expenses of other offers (e.g., there was another offer ALSO for inverted thermal insulation on the rooftop, which as it turned was unnecessary... according to Mr. Goumas) C) professional and beautiful result (in our cases, we had additional works to removal older materials). 
Konstantinos Kostoulas
12 Nov 2020
We were completely satisfied...
We installed insulation to our home’s roof top in Acharnes and we were completely satisfied by the result. I have hesitation in recommending Goumas insulations!
Aris Sygk
07 Apr 2019

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