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Construction methods
Méthodes de construction · 9 nov. 2026
Coffrage et ferraillage d'un poteau en béton armé
Le poteau en béton armé reprend les charges du plancher ou de la charpente et les transmet aux fondations. Sa résistance tient à un ferraillage corre…
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Méthodes de construction · 9 nov. 2026
Couler une dalle en béton : préparation, dosage et mise en œuvre
Une dalle réussie se joue à 80 % avant l'arrivée du béton : décaissement, hérisson, film et ferraillage. Le coulage lui-même est l'étape la plus cour…
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Méthodes de construction · 9 nov. 2026
Fondations d'une maison : semelles filantes pas à pas
La semelle filante est la fondation la plus répandue en maison individuelle : un élargissement en béton armé sous chaque mur porteur, qui répartit le…
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Méthodes de construction · 9 nov. 2026
Monter un mur en parpaings : la méthode complète
Un mur en parpaings bien monté repose sur trois choses : une assise saine, un mortier au bon dosage et des joints croisés contrôlés au fil et au nive…
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Frequently asked questions
How do I calculate the amount of concrete?
Multiply the area by the thickness: 20 m² × 0.12 m = 2.4 m³. Our concrete mix calculator then adds the cement, sand and gravel for the mix you choose.
How much does a concrete slab cost per m²?
Expect an average of €80 to €150 per m² laid by a professional in 2026, preparation included. The item-by-item breakdown is in our price guide.
How many blocks do I need for a wall?
You need 10 blocks of 20×20×50 per m² of wall, plus laying mortar. Get the exact figure with our block calculator.
Do I need permission to build a wall?
A boundary wall may require a prior declaration depending on your local plan (PLU); a load-bearing wall or an extension often requires more. Check with your local council before you start.
What cement content for concrete?
The standard content is 350 kg of cement per m³ for reinforced concrete, 300 kg for a pedestrian slab and 250 kg for lightly loaded foundations.
How thick should a concrete terrace be?
10 cm is enough for a pedestrian terrace; plan 12 to 15 cm if vehicles will drive over it, with suitable welded mesh.