How our prices are built

1. The formula in one sentence

Price = materials per layer + crew days × cost of a crew day + organisation, travel, warranty and margin.

These are the four lines of the “Why this much” card in our price calculator. They add up exactly to the price you see, to the euro.

An example: flat-roof thermal insulation and waterproofing, 100 m², in Attica. All amounts exclude VAT, except the last one.

• Materials of the layers: about €60.3 per m² × 100 m²€6,030
• Crew: 17 days (a basis for the price, not a promise of time) × €357.75 per day€6,082
• Organisation, travel, warranty and margin€8,638
• Total excluding VAT€20,750
• Total including 24% VAT€25,730

The calculator produces the same four parts for your own case. Open “Why this much” under the result.

2. Where each line comes from

Materials. From our suppliers’ price lists, layer by layer. We do not name suppliers here. The materials for your roof are named in your quotation.

Crew days. From our own projects: how many days the crew needed for every 100 m². To be honest, those projects are few. For some kinds of work the basis is a single project. Every new project we record corrects the number.

Cost of a crew day. Two tradesmen registered with Greek social security (e-EFKA): wages and social insurance contributions for each working day. Today it is €357.75 per day for the crew.

The fourth line. It is what remains of the price after materials and crew. It pays for organisation, the vehicle and transport, the photo record, the warranty reserve and our profit.

How sure we are, in three sentences. Materials are the surest line, because they come from price lists. Crew days are the least sure, because they rest on few projects. When we are wrong, it is usually in the days.

3. Why a range and not one number

The calculator knows only what you told it. It has not seen your roof. Where we can be wrong:

• Frame and slab: rotten timber, or a slab that needs levelling, shows only up close.
• Access: a narrow street, many stairs, no room for materials.
• Height: a tall building may need scaffolding, which is not in the price.
• Tiles: a different tile means different materials and different days.
• Weather: rain and wind stop the work.

In the 100 m² example, the range is €25,730 – €30,380 including VAT. The lower end is the price list. The upper end allows for a slower pace of work.

When information is missing, only the upper end opens. Without photos it opens by 15%. With difficult access, by 10%.

For flat-roof waterproofing we give only a “from” price: the final price is written after we measure.

4. Islands and places far from Attica

On an island the price includes the ferry, the travel days and the cost of the location. The crew’s travel is inside the range.

The lower end assumes you provide accommodation and meals for the crew. The upper end includes them from us, at a slower pace.

The same 100 m² job on a nearer Cyclades island: €29,931 – €38,440 including VAT, for the April–June season. In Attica it is €25,730 including VAT.

To be honest: this is calculated from the costs of getting there. It is not measured over many island projects of ours. We will correct it with every such project.

Minimum job: 60 m² on the Saronic islands, 75 m² on the nearer Cyclades, 80 m² on the more distant islands. On islands with a reduced VAT rate the amount differs; we state it in the quotation.

If no vehicle can reach the building, carrying the materials is priced separately, in a special quotation.

5. What the price includes, and what it does not

Included:

• the materials of the layers listed on each work’s page;
• the crew days, with the crew registered with e-EFKA;
• 24% VAT (in the amount “including VAT”);
• a photo record of the stages, especially of the layers before they are covered;
• 5-year written warranty (terms in the contract);
• on islands: the ferry and the crew’s travel days.

Not included:

• removing the old layer, and the debris: priced after the site inspection;
• scaffolding;
• a levelling layer or a check of the slab’s strength, if needed: we state them in the quotation;
• the roof of a pergola: case by case, with a drawing;
• anything you did not state in the calculator.

Every job starts from €682 including VAT (€550 plus VAT). A small job still takes the crew a whole day.

6. How the price is locked

First we measure on the roof. Then we send you a written quotation: total price, materials, what is not included, how long it is valid.

Then we sign a contract. From then on, the price changes only with your written approval.

If we find something unexpected, we stop and send you a photo and a written price. We continue when you approve. All the steps are on How we work.

7. How much we earn

The fourth line pays for organisation, travel, the warranty and our profit. It is not hidden: you see it in the “Why this much” card, for your own case. We do not split it further, because it changes from project to project. If you want to discuss it, ask us. If our price looks high to you, ask us to go through the four lines for your own roof together.

8. Last updated

Price list version v3.3, 6 November 2026. This article was written on 7 November 2026. When the price list changes, the amounts here change too.

If you find a cheaper quotation for exactly the same work, send it to us. Either we will explain it, or we will learn something.

Two quotes for the same roof: what to ask →