Before you buy roofing sheets Read this first!

 🏠 BEFORE YOU BUY ROOFING SHEETS — READ THIS FIRST!

(This Knowledge Could Save You From Huge Expenses Later) 💡

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Many people buy roofing sheets based on price alone.

This is a serious mistake that may force you to replace your roof much earlier than expected.

Here are 9 professional things you must know before buying any roofing sheet:

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1️⃣ TYPE OF ROOFING SHEET

Choose the right type based on your usage and environment:

🔹 Galvanized — coated with zinc to prevent rust

🔹 Aluzinc — a combination of aluminium and zinc — lasts longer

🔹 Color Coated — has a top paint layer for extra protection and better appearance

👉 Aluzinc roofing sheets are most suitable for coastal areas and high-humidity environments.

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2️⃣ THICKNESS OF ROOFING SHEET (mm)

(mm = Millimetres — measurement of steel thickness)

🔹 0.20 mm — too thin, not suitable for permanent houses

🔹 0.25 mm — suitable for standard houses

🔹 0.30 mm and above — stronger, recommended for quality buildings

👉 Don't choose thin roofing sheets just to save money — you will pay more later.

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3️⃣ GAUGE (G)

(G = Another measurement of roofing sheet thickness)

Important rule to remember:

✔ Smaller number = Thicker sheet = Stronger

✔ Larger number = Thinner sheet = Weaker

👉 Example: Gauge 28 is heavier and stronger than Gauge 32.

Always consult a professional before making your final decision.

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4️⃣ ZINC COATING LEVEL (GSM)

(GSM = Grams per Square Metre — measurement of rust protection)

🔹 Z60 — Z80 — low protection

🔹 Z80 — Z100 — moderate protection

🔹 Z150+ — high and long-lasting protection

👉 The higher the GSM, the longer the roofing sheet lasts.

For a permanent house, choose Z150 or above.

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5️⃣ YOUR LOCATION AND ENVIRONMENT

Your environment greatly affects the lifespan of roofing sheets:

🌊 Near the coast — salty air accelerates rust

🌧️ High rainfall areas — excessive moisture speeds up corrosion

🏭 Industrial areas — airborne chemicals damage roofing sheets

👉 If you are in a coastal or harsh environment — use roofing sheets with high GSM and Aluzinc coating.

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6️⃣ ROOF PITCH (Mwinuko wa Paa)

The roof pitch affects your choice of roofing sheet:

❌ Too low pitch — water may flow back and cause leakage

✅ Correct pitch — water flows off easily and efficiently

👉 The type of roofing sheet must be chosen according to your roof pitch — not appearance alone.

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7️⃣ PROPER INSTALLATION

A quality roofing sheet without proper installation will leak — this is a construction fact.

Make sure:

✔ Use screws with rubber washers — they prevent water penetration

✔ Ensure correct overlap between sheets

✔ Use flashing at valleys, ridges, and junction points

👉 Poor installation is the main cause of roof leakage — not just poor sheet quality.

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8️⃣ PRODUCT WARRANTY

Before buying — ask these important questions:

✔ How many years is the warranty?

✔ What does it cover — rust, paint, or both?

✔ Who provides the warranty — a reliable company or not?

👉 Quality products always come with a clear, written, and reliable warranty.

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9️⃣ NEVER CHOOSE BY PRICE ALONE!

A roofing sheet is not just a cost — it is a long-term investment of over 50 years.

Key factors for choosing quality roofing sheets:

✔ mm — correct thickness

✔ GSM — zinc coating level

✔ Gauge — thickness number

✔ Type — Galvanized, Aluzinc, or Color Coated

✔ Environment — the area where you are building

👉 Don't waste money buying poor quality sheets at a cheap price — you will pay twice.

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📌 PROFESSIONAL SUMMARY:

FACTOR and KEY RECOMMENDATION:

Type of Sheet — Aluzinc for coastal areas

Thickness (mm) — 0.25mm or above

Gauge — Smaller number means stronger

Zinc GSM — Z150 or above for quality houses

Environment — Check air and moisture of the area

Roof Pitch — Must match the type of sheet chosen

Installation — Rubber screws and correct overlap

Warranty — Ask and confirm in writing

Price — Never judge by price alone — judge by quality

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🏗️ DO YOU NEED PROFESSIONAL ROOFING ADVICE?

MJENZI WA NYUMBA TZ helps you choose and install the right roofing sheets according to your house and environment.

OUR SERVICES:

✅ Roofing Works

— Installation of all types of roofing sheets to professional standards

✅ Architectural Designs

— Including proper roof pitch planning

✅ Full Construction

— From foundation to handing over keys

✅ BOQ — Accurate Cost Estimation

— Including accurate roofing and installation costs

✅ Roof Renovation

— Repairing and replacing worn-out roofs

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📲 CONTACT US NOW:

📞 Phone: +255 712 937 090

💬 WhatsApp: https://wa.me/255765937090

📧 Email: info@mjenziwanyumbatz.com

🌐 Website: https://mjenziwanyumbatz.com

📺 YouTube: https://youtube.com/@mjenziwanyumbatz

📍 Dar es Salaam, Tanzania

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"A quality house is built by a quality builder." 🏠

MJENZI WA NYUMBA TZ — We Build Lives, Not Just Walls.

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