Roof insulation: the absolute guide

Often, our customers ask us what is the best way to insulate their roof. We will try below to describe all the steps that need to be done to achieve the desired result.

In the beginnings, we have to understand that insulation is done for 2 reasons. First, for the treatment of humidity and second for the improvement of the thermal insulation of our building and especially of the top floor. The thermal insulation stage can be avoided but the benefits we gain are quite significant in relation to the additional costs. But let us look at the stages of proper insulation.

Stage 1: Water vapor dam (cost 1 € / sq.m.)

After removing all unnecessary objects from the roof and proceeding with a thorough cleaning, we apply an elastomeric coating waterproofing emulsion of asphalt base.

Water vapor barrier

Stage 2: Installation of thermal insulation (cost 10-14 € / sq.m.)

This step concerns the thermal insulation of the roof and can (due to cost) be omitted. We install extruded polystyrene from 5 to 10 cm thick depending on the location and needs of the building.

Stage 3: Laying of foam concrete or cement mortar (cost 10-12 € / sq.m.)

Following is the laying of foam concrete or cement mortar in order to achieve the necessary leaks to the roof water drains. This step is especially important because potential stagnant water on the roof surface will sooner or later create problems.

Drainage and thermal insulation

Stage 4: Application of asphalt sheets (cost 12-15 € / sq.m.)

In order to achieve the desired and necessary waterproofing, asphalt sheets are placed on the entire surface of the roof. With the correct application of the asphalt sheets and having followed the previous steps, we are sure of the absolute waterproofing of the roof.

We can stop at this point but we will have the disadvantage of the impassability of our roof. Asphalt is a delicate material that can be easily damaged if we walk on it or touch various objects. To solve this problem we continue in the next steps.

Installation of asphalt sheets

Stage 5: Laying of cement mortar (cost 10 € / sq.m.)

In order to make our terrace passable and to be able to climb and bake in our new barbecue, we must install tiles, marbles, etc. Tiles and marbles are very hard materials and protect our asphalt sheets from possible damage. To proceed with their installation, we spread a mixture of cement and sand 2-3cm thick (cement mortar).

Preparation for laying tiles

Stage 6: Supply and installation of tiles (cost 25-30 € / sq.m.)

Finally, we install ceramic tiles, preferably with ice resistance and non-slip properties. After this stage our terrace is completely protected from moisture, has increased thermal insulation properties and at the same time is a very beautiful place that can be used for gatherings with relatives and friends.

Final view of the roof

* Prices are indicative and do not include VAT 24%

* The above descriptions and analyzes are intended for the simple understanding of products and processes and are not scientific texts

More arcticles