Construction Materials Supply Guide for İzmir: How to Choose Rebar, Brick, OSB, Timber, Pipes and Fasteners

In short: the three things that matter most when choosing construction materials are matching the project’s list, documentation and quality checks, and a sound storage and delivery plan. In a humid coastal city in a high seismic zone like İzmir, certified, standards-compliant products matter most for structural materials (rebar, concrete, brick), while moisture and corrosion resistance matter most in damp conditions (OSB, timber, fasteners). This guide covers selection, inspection and quote comparison for rebar, brick and masonry, timber and OSB boards, pipes and galvanised fasteners.

What influences material choice in İzmir?

• Seismic risk: İzmir lies in a high seismic risk region. Materials used in the structural system must meet the grade and certification required by the project and regulations.
• Humidity and salty air: Near the coast, humidity and salt speed up corrosion; steel, fasteners and timber need extra protection.
• Hot summers: Materials left outdoors on site (timber, pipes, boards) can deform in the sun.
• Seasonal rain: Winter rain affects storage and delivery planning.

Before you start: the list and the quantities

Good supply starts with a good list.

1. Extract the material list and quantities from the project (count, length, diameter, thickness, grade).
2. Copy the quality grades from the structural and architectural projects exactly.
3. Add a sensible allowance for waste and loss.
4. Split deliveries into stages; taking everything at once creates storage problems.
5. Ask every supplier for a quote on the same list.

Rebar

Ribbed rebar reinforces concrete and is one of the items that decide a building’s structural life.

• Grade and diameter: Use the steel grade and diameter in the project. In Türkiye, TS 708 is generally the reference standard for reinforcing steel.
• Manufacturer tag and batch number: Bundles should carry a tag with batch and manufacturer details that match the certificate.
• Rib pattern: Regular, continuous ribs ensure bonding with the concrete.
• Surface: Light surface rust may be acceptable; heavy flaking rust points to loss of section. Ask the project engineer or site manager.
• Length and bending: Clarify the lengths and bends in the project and who provides cutting and bending.

Brick and masonry materials

Common wall options are clay brick (hollow brick), aerated concrete and concrete blocks. The choice depends on insulation, sound, load-bearing role and budget.

Material	Strength	Watch out for
Hollow brick	Balance of insulation and sound, widely used	Hole pattern and grade, mortar and workmanship quality
Aerated concrete	Light, good insulation	Protection from moisture, correct adhesive and workmanship
Concrete block	Strength and cost	Heavy, insulation may be limited on its own

The TS EN 771 series of standards is generally the reference for masonry units. Confirm with the architect and structural engineer which material suits the building type, whether the wall is load-bearing, and your insulation expectations.

Timber and OSB boards

Used for formwork, roofs, scaffolding, cladding and partitions.

Timber

• Moisture content: Fresh, wet wood warps and cracks as it dries. Choose seasoned timber suited to its use.
• Grade and strength class: For structural use (beams, roofs), the strength class of the timber matters for the project.
• Protection: In exterior and damp locations, consider treatment against fungus and insects.
• Appearance and quality: Knots, cracks, bowing and dimensional tolerance should be checked before ordering.

OSB board

OSB (oriented strand board) is made by pressing layered, oriented strands. Boards are divided into use classes: those for dry conditions differ from those that can carry load in humid conditions. For roofs, floors and exterior cladding with moisture risk, check the board’s moisture class, do not leave edges exposed and do not leave it out in the rain.

Pipes and galvanised fasteners

Pipes

When choosing pipes, purpose (water, heating, structural, scaffolding), diameter, wall thickness and material (steel, galvanised, plastic) decide. For water and pressure use, prefer certified products that meet the relevant standard.

Galvanised fasteners

Galvanising protects steel with a zinc coating. The coating type changes durability:

Coating	Characteristic	Where?
Electro-galvanised	Thin coating, smooth surface	Indoors, dry conditions
Hot-dip galvanised	Thick coating, long life	Outdoors, humid or salty conditions

Standards such as EN ISO 1461 are cited as a quality reference for hot-dip galvanising. Bolt, nut and washer should be in the same coating class; remember there is a corrosion risk where different metals touch. The strength class of bolts (e.g. 8.8) should also be chosen according to the project.

Certificates, standards and labels

When buying materials, ask for and check:

• Conformity certificate / test report (especially for structural materials)
• Manufacturer tag, batch and production information
• CE marking and declaration of performance, for relevant products (generally required for construction products)
• Standard number (TS, TS EN)

An uncertified product or one with a removed label may look cheap but carries long-term risk. Confirm with the architect, structural engineer or site manager which documents are needed for which product.

What to check on delivery

1. Compare count, size, diameter and grade with the delivery note and order.
2. Match tags and batch information with the certificate.
3. Visually check for damage, bowing, rust, cracks and wetness.
4. If there is a problem, write it on the delivery receipt and photograph it.
5. If needed, ask about the possibility of taking a sample for lab testing.

Storage

• Do not lay rebar directly on the ground; keep it on blocks, covered and away from mud.
• Stack timber and OSB flat in a dry, ventilated, covered place.
• Sort pipes and fasteners by grade and diameter and keep their labels.
• Keep cement and moisture-sensitive materials in a closed, dry area.
• Split deliveries into stages to cut the risk of materials waiting on site for long.

Comparing quotes

Price alone is misleading. When comparing, look at:

• Is the same product, grade and size quoted?
• VAT included or excluded?
• Are transport, unloading and handling in the price?
• Lead time, and is staged delivery possible?
• Payment terms and quote validity
• Documents, labels and return/exchange conditions

Common mistakes

1. Not asking for the grade and documents on structural materials.
2. Ordering without calculating quantities and waste.
3. Not checking tags and sizes on delivery.
4. Leaving materials in the open, in damp conditions.
5. Looking only at the cheapest quote without comparing transport, VAT and payment terms.
6. Using thinly coated fasteners such as electro-galvanised outdoors.

Next steps

In Yerpa’s construction materials category you can browse images of rebar, brick and masonry, timber and OSB boards, pipes and galvanised fasteners. If you are also planning metal building elements such as gates and railings, read our guide to metal gates and railings in İzmir. For a project in another city, see our ordering guide.

Send us the product type, size, grade, quantity or tonnage and delivery address through our contact page or on WhatsApp, and we will prepare suitable options and a quote.