House Wrap Calculator

How to Measure Your Walls for House Wrap

Accurate measurements are the foundation of a successful house wrap installation. Before you can use the calculator above, you need precise dimensions of your exterior walls. Here’s a step-by-step guide to measuring your walls correctly:

Step 1: Measure Wall Length – Use a long tape measure to determine the length of each exterior wall from corner to corner. Measure at the bottom of the wall near the foundation for the most accurate reading. Record each measurement separately rather than trying to remember them all.

Step 2: Measure Wall Height – Measure from the bottom of the sheathing to the top where the wall meets the soffit or roof line. If you have multiple stories, measure each level separately and add them together. Don’t forget to include gable ends if your home has a peaked roof.

Step 3: Count and Measure Windows – Count all windows on exterior walls and measure the rough opening dimensions (the actual hole in the wall, not just the glass). Most standard windows are approximately 3 feet wide by 4 feet tall, but verify your actual dimensions for accuracy.

Step 4: Count and Measure Doors – Include all exterior doors in your count. Standard entry doors are typically 3 feet wide by 7 feet tall, while sliding glass doors and French doors will be larger. Measure the rough opening for each door type.

Pro Tip: Take photos of each wall as you measure it and write the dimensions directly on the photo using your phone. This creates a visual reference you can refer to later and helps prevent confusion when entering numbers into the calculator.

If you’re planning a professional house wrap installation, having these measurements ready will help you get accurate quotes and ensure you order the right amount of material.

Understanding House Wrap Overlap Requirements

Proper overlap is not just a recommendation – it’s a building code requirement in most jurisdictions. The overlap creates a shingled effect that directs water down and away from the building, preventing moisture intrusion that can lead to mold, rot, and structural damage.

Standard Overlap Requirements: Most building codes require a minimum 6-inch overlap on horizontal seams and a 6-inch overlap on vertical seams. This standard applies to most residential construction in 2026. However, always check your local building codes, as some high-wind or high-moisture areas may require larger overlaps.

Why Overlap Matters: The overlap creates a weatherproof barrier by ensuring that water hitting the house wrap always encounters a downward-facing seam. Without proper overlap, water can wick behind the house wrap through capillary action or be driven behind it by wind pressure. This defeats the entire purpose of the water-resistive barrier.

Horizontal Seams: When installing house wrap in horizontal rows, the upper course should always overlap the lower course by at least 6 inches. Think of it like roof shingles – the water should never encounter an upward-facing edge where it could get behind the material.

Vertical Seams: Where two pieces of house wrap meet at a vertical seam, overlap them by 6 inches with the piece closer to the corner overlapping the piece further from the corner. This ensures water is directed away from inside corners where moisture problems are most likely.

Window and Door Openings: These areas require special attention. The house wrap should extend past window and door openings, and house wrap tape should seal all seams and penetrations. Many contractors use a 12-inch overlap around openings for extra protection.

Our calculator above includes a default 10% overlap factor, which accounts for the standard 6-inch overlap plus a small waste allowance. You can adjust this percentage if your project requires more generous overlaps or if you want to minimize waste on a simple rectangular structure.

Standard House Wrap Roll Sizes

House wrap comes in several standard roll sizes designed to maximize coverage while remaining manageable for installation crews. Understanding these sizes helps you choose the most economical option for your project.

Common Roll Dimensions and Coverage:

• 3 ft x 100 ft (300 sq ft) – Ideal for small projects like sheds, garages, or additions. Easier to handle for DIY installers but requires more seams on larger projects.
• 5 ft x 200 ft (1,000 sq ft) – The most popular residential size. Good balance between coverage and manageability for typical single-story homes.
• 9 ft x 100 ft (900 sq ft) – Perfect for standard 8-foot walls (allows for overlap). Minimizes horizontal seams on single-story construction.
• 9 ft x 150 ft (1,350 sq ft) – Commercial grade, excellent for larger homes or multi-story construction. Reduces the number of rolls needed.
• 10 ft x 150 ft (1,500 sq ft) – Professional/commercial size for maximum coverage. Best for experienced crews with proper equipment.

Choosing the Right Size: For most residential projects, the 9-foot width is optimal because it covers a standard 8-foot wall height with enough material for top and bottom overlap. If you have 10-foot ceilings or two-story walls, consider the longer roll lengths to reduce vertical seams.

Weight and Handling: Larger rolls are heavier and more difficult to handle, especially on scaffolding or ladders. A 9 ft x 150 ft roll can weigh 30-40 pounds depending on the house wrap type. Make sure you have adequate help and equipment before ordering the largest sizes.

When comparing prices, always calculate the cost per square foot rather than cost per roll. A larger roll usually offers better value, but only if you’ll use most of it. For smaller projects, buying an extra small roll is often more economical than having half of a large roll left over.

How Much Does House Wrap Cost?

House wrap costs vary significantly based on material type, brand, and quality. Understanding these price ranges helps you budget accurately and choose the right product for your needs in 2026.

Budget Options ($0.05 – $0.15 per sq ft): Basic polypropylene or polyethylene house wraps offer minimal water resistance and breathability. These products meet minimum code requirements but may not perform well in challenging climates or high-moisture conditions. Suitable for budget-conscious projects in mild climates.

Mid-Range Options ($0.15 – $0.35 per sq ft): This category includes most name-brand house wraps with good water resistance and vapor permeability. These products typically carry 15-30 year warranties and represent the best value for most residential projects. Brands in this range often include UV resistance allowing several months of exposure before siding installation.

Premium Options ($0.35 – $0.60 per sq ft): High-performance house wraps feature advanced materials with superior strength, breathability, and weather resistance. These products often include drainage features, higher UV resistance (up to 12 months), and longer warranties. Worth considering for high-end homes or challenging environmental conditions.

Custom Options ($0.60 – $1.50+ per sq ft): Custom house wrap with printed branding, logos, or specific performance characteristics commands premium pricing but offers unique benefits for commercial projects or builders wanting to showcase their brand during construction.

Additional Cost Factors:

• Labor: Professional installation typically costs $0.50 – $1.50 per square foot depending on your location and project complexity
• Tape and Fasteners: Budget an additional 10-15% for seam tape, cap nails, and other fastening materials
• Shipping: House wrap is bulky, and shipping costs can add $50-200 per order depending on distance and quantity

Example Cost Calculation: For a 2,000 square foot project using mid-range house wrap at $0.25 per square foot, expect to pay approximately $500 for the house wrap itself, plus $100-150 for tape and fasteners, and $1,000-2,500 for professional installation. Total project cost ranges from $1,600 to $3,150.

If you’re considering different products, our article on Tyvek alternatives can help you compare performance characteristics and pricing across popular brands.

Tips to Minimize House Wrap Waste

Smart planning and installation techniques can significantly reduce house wrap waste, saving you money while maintaining proper protection for your building. Here are proven strategies used by professional contractors:

Plan Your Layout Before Cutting: Before making any cuts, create a simple diagram showing how the house wrap will be applied to each wall. Start with the longest uninterrupted walls and use remaining pieces for shorter sections. This planning step alone can reduce waste by 15-20%.

Use Vertical Installation on Tall Walls: On two-story walls or gable ends, consider running the house wrap vertically instead of horizontally. This eliminates horizontal seams and often results in less waste because you’re working with the natural dimensions of the roll.

Save Cutouts for Small Areas: Don’t throw away pieces cut out for windows and doors. These sections are perfect for small areas around service penetrations, between windows, or in other tight spaces where a full-width roll would create excess waste.

Coordinate with Window and Door Openings: When possible, plan horizontal seams to fall just above or below window headers. This minimizes the amount of material that needs to be cut away and creates cleaner, easier-to-seal openings.

Buy the Right Roll Size: Use the calculator at the top of this page to determine the optimal roll size for your project. Buying three 1,000 sq ft rolls instead of two 1,500 sq ft rolls might cost slightly more per square foot but results in less leftover material.

Order Strategically: If the calculator shows you need 2.3 rolls, you have to round up to 3 rolls. But if your project is near the edge (like 1.9 rolls), consider whether you can tighten up measurements or reduce overlap in low-risk areas to stay under 2 rolls. However, never compromise building code requirements to save a few dollars.

Share with Neighbors or Save for Later: If you end up with a partial roll left over, consider splitting the cost with a neighbor who has a project coming up, or save it for future repairs, shed construction, or other small projects. Properly stored house wrap remains usable for years.

Consider the Weather-Resistant Barrier Sequence: Understanding how house wrap fits into the overall house wrap vs vapor barrier system helps you plan more efficiently and avoid common installation mistakes that lead to material waste.

Frequently Asked Questions

How much house wrap do I need for a 2000 sq ft house?

For a 2,000 square foot house, you’ll need approximately 2,000-2,400 square feet of house wrap, depending on wall height, window and door openings, and overlap requirements. A typical single-story home with 8-foot walls and standard openings would require 2-3 rolls of 1,000 sq ft house wrap. Use the calculator above with your specific dimensions for an accurate estimate.

Do I need to overlap house wrap?

Yes, house wrap must be overlapped to create an effective water-resistive barrier. Building codes typically require a minimum 6-inch overlap at all seams, both horizontal and vertical. The upper course should always overlap the lower course, similar to roof shingles, to direct water downward and away from the structure.

Can I install house wrap vertically?

Yes, vertical installation is acceptable and sometimes preferred for tall walls or gable ends. Vertical installation eliminates horizontal seams and can reduce waste on two-story construction. However, you must still maintain proper 6-inch overlaps at vertical seams, with the piece closer to the corner overlapping the piece further away.

How do I calculate house wrap for a two-story house?

Measure each story separately and add them together. For example, if your first floor walls are 10 feet tall and 150 feet in perimeter, that’s 1,500 sq ft. If the second story is 9 feet tall with 140 feet of perimeter, add another 1,260 sq ft. Subtract window and door openings from both floors, then add 10% for overlap and waste.

What happens if I don’t use enough house wrap?

Running short on house wrap during installation creates problems. Mid-project trips to purchase more material cause delays and may result in color or batch variations. More importantly, rushed installation to stretch remaining material often leads to inadequate overlap, improperly sealed seams, or gaps in coverage that compromise the weather-resistive barrier.

Should I buy extra house wrap just in case?

Yes, it’s wise to have 5-10% extra material beyond what the calculator shows. This buffer accounts for cutting errors, difficult areas around architectural features, and unexpected conditions discovered during installation. Unopened rolls can usually be returned, and an extra partial roll is useful for future repairs or small projects.

Ready to order your materials? Contact us for pricing on standard or custom house wrap for your project.