Liwwe.com Site Map | Online Tools, Calculators & Browser Games Directory

Liwwe.com Site Map

Welcome to Liwwe.com - your one-stop destination for free online tools, calculators, converters, generators, and fun browser games. Our comprehensive collection of web utilities helps you solve everyday problems, perform complex calculations, convert between units, generate secure passwords, and much more - all without downloading any software. Whether you're a student, professional, or just someone who loves handy tools, you'll find what you need here.

Below is our complete directory of all available tools organized by category for easy navigation.

Roofing Calculator

Estimate materials, costs, and measurements for your roofing project

Roof Measurements
Material Options

Understanding Roof Pitch

Roof pitch (or slope) affects both material requirements and labor costs. It's expressed as a ratio of vertical rise to horizontal run:

Flat/Low Slope (0/12 to 3/12): Requires special materials to prevent leaks. Easier to work on but needs more underlayment.
Conventional (4/12 to 6/12): Most common residential pitch. Good balance of aesthetics and water runoff.
Steep (7/12 to 12/12): Requires more materials and safety equipment. Adds 20-40% to labor costs.
Extreme (13/12+): Specialty roofs that may require different materials and significantly more labor.

Roofing Material Options

3-Tab Shingles

$20-25/sq ft installed
15-20 year lifespan

Architectural

$25-35/sq ft installed
25-30 year lifespan

Premium/Luxury

$35-50/sq ft installed
30-50 year lifespan

Metal Roofing

$60-100/sq ft installed
40-70 year lifespan

Slate

$75-150/sq ft installed
75-150 year lifespan

Tile

$70-120/sq ft installed
50-100 year lifespan

Roofing Project Tips

Get Multiple Quotes

Always get at least 3 estimates from licensed contractors. Prices can vary significantly.

Check Weather

Schedule roofing work during dry seasons. Most shingles need 24+ hours of dry weather to seal properly.

Understand Warranties

Manufacturer warranties often require specific installation methods. Ask your contractor about this.

Disposal Costs

Factor in $100-300 per square for old roof removal and disposal in your budget.

Roofing Calculator FAQs

In roofing terminology, a "square" equals 100 square feet of roof area. Materials are typically sold by the square. For example, shingles usually come in bundles that cover 1/3 of a square (33.3 sq ft), so you'd need 3 bundles per square.

This calculator provides estimates based on industry standards, but actual requirements may vary by 10-15% depending on roof complexity, local labor rates, and specific material choices. Always consult with a professional roofer for precise estimates. The calculator doesn't account for special features like skylights, chimneys, or complex dormers that may require additional materials.

Steeper roofs have more surface area than their footprint suggests. For example, a 12/12 pitch roof has about 40% more surface area than a flat roof with the same footprint. Additionally, steeper roofs may require special underlayments, fasteners, and safety equipment that increase costs.