Mobile Home Roofing Cost Calculator

Step 1: Enter the Mobile Home Length

Enter the exterior length of the mobile home in feet. Common examples include:

• 56 feet
• 60 feet
• 66 feet
• 70 feet
• 76 feet
• 80 feet

Use the full roof length rather than the interior living-space measurement. Include any roof sections that extend over:

• End walls
• Porches
• Additions
• Utility rooms
• Attached entry structures

Only include an attached section when it will be part of the roofing project.

Step 2: Enter the Mobile Home Width

Enter the exterior width of the home in feet. Common mobile home widths include:

• 12 feet
• 14 feet
• 16 feet
• 24 feet
• 28 feet
• 32 feet

A single-wide is normally entered as one roof section. A double-wide should include the total combined width when both sections are receiving the same roofing system. For example: Double-wide section width: 14 feet + 14 feet = 28 feet The calculator uses the length and width to estimate the roof footprint.

Step 3: Add the Roof Overhang

Enter the average roof overhang in inches or feet. Roofing extends beyond the exterior wall line, so using only the home’s floor dimensions may underestimate the material quantity. Common mobile home roof overhangs range from:

• 6 inches
• 12 inches
• 18 inches
• 24 inches

The calculator adds the overhang to both sides and ends. The adjusted dimensions are: Adjusted roof length = home length + front overhang + rear overhang Adjusted roof width = home width + left overhang + right overhang

Step 4: Select the Roof Pitch

Roof pitch describes how steeply the roof rises.

Flat or Low-Slope Roof

Choose this option for roofs with little visible slope. Low-slope mobile home roofs commonly use:

• TPO membrane
• EPDM membrane
• Modified-bitumen roofing
• Elastomeric coating
• Silicone coating
• Metal roof-over systems

The calculator uses a low roof-area multiplier but may apply material rates intended for membrane or coating systems.

Moderate-Pitch Roof

Choose moderate pitch for a roof with a visible slope that remains easy for professional roofers to access. This option is common on newer manufactured homes with:

• Asphalt shingles
• Metal panels
• Architectural shingles

The calculator adds a small roof-area adjustment.

Steep or Complex Roof

Select this option when the home has:

• A steep roof
• Multiple roof sections
• Dormers
• Valleys
• Attached additions
• Intersecting rooflines
• Difficult ridge access

The calculator applies a larger area and labor multiplier. Roof pitch increases the actual surface area beyond the basic building footprint.

Step 5: Select the Roofing Project Type

Choose the option that best describes the work being performed.

Roof Inspection and Minor Repair

Select this option when the project involves limited work such as:

• Sealing small leaks
• Replacing damaged fasteners
• Repairing flashing
• Patching a membrane
• Replacing a few shingles
• Sealing roof penetrations

This option is not appropriate when the roof has widespread deterioration or structural damage.

Mobile Home Roof Coating

Choose roof coating when the existing roof is generally stable but needs a new protective surface. A coating project may include:

• Roof cleaning
• Seam preparation
• Fastener sealing
• Crack repair
• Primer
• Elastomeric or silicone coating

A coating is not a substitute for replacing rotten decking, saturated insulation, or a failed roof membrane.

Mobile Home Roof-Over

Choose this option when a new roofing system will be installed over the existing roof. A roof-over may use:

• Metal panels
• Framed metal roofing
• Insulated roof-over panels
• Membrane systems
• Lightweight roofing materials

A roof-over generally costs less than a complete tear-off when the existing structure can safely support the new system. Current 2026 estimates place many mobile home roof-over projects between approximately $1,500 and $6,000, although larger insulated or premium systems can cost considerably more.

Complete Roof Replacement

Select complete replacement when the existing roofing will be removed and a new system installed. This project may include:

• Tear-off
• Disposal
• Deck inspection
• Deck repairs
• New underlayment
• New roofing material
• Flashing
• Ridge and edge components
• Final sealing

A full replacement usually provides the highest initial cost but allows the contractor to inspect hidden damage.

Step 6: Select the Roofing Material

The selected material determines the main cost per square foot.

Elastomeric Roof Coating

Elastomeric coating is commonly used on compatible low-slope mobile home roofs. The calculator may include:

• Cleaning
• Seam repair
• Fastener sealing
• Primer where required
• Multiple coating passes

Choose this option only when the existing roof is suitable for restoration.

Silicone Roof Coating

Silicone coating generally costs more than basic elastomeric coating but may perform well where standing water or intense ultraviolet exposure is a concern. The roof must still be properly prepared and repaired before coating.

TPO Membrane Roofing

TPO is a single-ply roofing membrane used on low-slope roofs. The installed system may include:

• Insulation board
• Cover board
• TPO membrane
• Adhesive or mechanical fastening
• Heat-welded seams
• Edge flashing

TPO often falls within the middle of the calculator’s material range.

EPDM Rubber Roofing

EPDM is another membrane option for low-slope manufactured-home roofs. Cost depends on:

• Membrane thickness
• Attachment method
• Insulation
• Perimeter details
• Roof penetrations
• Existing substrate condition

Asphalt Shingles

Asphalt shingles are commonly used on pitched manufactured-home roofs. The system may include:

• Underlayment
• Starter shingles
• Field shingles
• Ridge caps
• Drip edge
• Flashing
• Ventilation components

The structure must be suitable for the selected shingle weight.

Exposed-Fastener Metal Roofing

Exposed-fastener metal panels are often more affordable than standing-seam systems. The calculator includes an allowance for:

• Metal panels
• Fasteners
• Closures
• Trim
• Ridge caps
• Flashing

The roof must be installed with proper thermal movement, fastener placement, sealing, and ventilation.

Standing-Seam Metal Roofing

Standing-seam metal uses concealed fasteners and generally costs more than exposed-fastener panels. The higher material and labor rate reflects:

• Specialized panels
• Clips
• Seaming equipment
• Detailed flashing
• More complex installation

Insulated Metal Roof-Over

An insulated roof-over may include:

• Framing
• Insulation board
• Air space
• Metal panels
• Edge trim
• New drainage details

This option normally receives one of the highest calculator rates.

Step 7: Enter the Roofing Waste Factor

Roofing projects require extra material for cuts, overlaps, seams, damaged pieces, starter sections, and future repairs. The calculator can use:

• 10% waste for simple rectangular roofs
• 12% waste for moderate roof complexity
• 15% waste for complex roofs, valleys, additions, or multiple sections

The roofing material quantity is calculated as: Adjusted roof area × waste factor = order quantity For a 1,200-square-foot roof with 10% waste: 1,200 × 1.10 = 1,320 square feet of roofing material

Step 8: Select the Existing Roof Removal Level

Choose how much existing roofing must be removed.

No Tear-Off

Select no tear-off when:

• A compatible coating is being applied
• An approved roof-over will remain over the existing surface
• Removal is not required by the selected system

No removal allowance is added.

Single-Layer Tear-Off

Choose this option when one roofing layer must be removed. The calculator adds a per-square-foot allowance for:

• Labor
• Loading
• Hauling
• Disposal
• Basic cleanup

Multiple Roofing Layers

Select this option when the roof has multiple coatings, shingles, membranes, or previous overlays. Additional layers increase:

• Labor time
• Disposal volume
• Container costs
• Roof preparation

Difficult or Heavy Tear-Off

Choose this option when the project involves:

• Adhered membrane
• Heavy built-up roofing
• Multiple coatings
• Damaged insulation board
• Wet roofing materials
• Difficult disposal access

The calculator uses the highest removal rate.

Step 9: Select the Roof-Deck Condition

The roof deck supports the roofing material.

Decking in Good Condition

Choose this option when the roof deck is dry, stable, and free of visible deterioration. No repair allowance is added.

Minor Deck Repairs

Select minor repairs for isolated areas of:

• Soft decking
• Fastener damage
• Small leaks
• Edge deterioration
• Limited plywood or sheathing replacement

The calculator adds a small repair allowance.

Partial Deck Replacement

Choose this option when several areas require new decking. The repair cost is calculated using the estimated damaged square footage: Damaged deck area × deck replacement rate = deck repair cost

Extensive Deck or Structural Repair

Select extensive repair when the roof has:

• Widespread soft decking
• Sagging areas
• Rotten roof framing
• Long-term leakage
• Damaged trusses or rafters
• Collapsed sections

The calculator adds a substantial allowance, but structural damage should be inspected separately.

Step 10: Add an Insulation Upgrade

Arizona’s high cooling demand makes roof insulation an important project consideration.

No Insulation Work

Choose this option when the existing insulation remains unchanged.

Add Rigid Insulation Board

Select this option when rigid insulation will be installed beneath a membrane or roof-over system. The cost depends on:

• Insulation thickness
• Required thermal value
• Cover-board requirements
• Attachment method
• Roof-edge adjustments

Replace Damaged Roof-Cavity Insulation

Choose this option when insulation has been affected by:

• Roof leakage
• Moisture
• Pests
• Compression
• Previous repairs

Insulated Roof-Over System

Select this option for a complete roof-over that includes an insulation layer or engineered air space. The calculator applies the highest insulation allowance.

Step 11: Select the Flashing and Roof-Penetration Level

Roof penetrations require detailed sealing and flashing. Common roof penetrations include:

• Plumbing vents
• Furnace vents
• Water-heater vents
• Exhaust fans
• Skylights
• Air-conditioning supports
• Antennas
• Solar equipment

Basic Flashing

Choose basic flashing for a simple roof with few penetrations.

Moderate Flashing Work

Select moderate work when several vents, edges, or transitions need replacement or resealing.

Extensive Flashing Work

Choose extensive flashing when the project includes:

• Multiple penetrations
• Skylights
• Chimneys
• Additions
• Valleys
• Complex edge transitions
• Existing flashing failures

The calculator adds a separate flashing allowance.

Step 12: Select the Roof-Access Difficulty

Access influences roofing labor, equipment, and material handling.

Easy Access

Choose easy access when:

• The home is accessible from all sides
• Materials can be delivered close to the structure
• The roof has a low or moderate pitch
• Landscaping does not block equipment
• There are no major park restrictions

No access multiplier is added.

Moderate Access Difficulty

Select this option when the project has:

• Limited parking
• Close neighboring homes
• Fences or landscaping
• Restricted staging space
• Moderate roof height
• Park access rules

The calculator adds approximately 10% to labor.

Difficult Access

Choose difficult access when:

• The home is on a hillside
• Equipment cannot approach the structure
• The roof is steep or complex
• Landscaping blocks several sides
• Materials require extensive hand-carrying
• The site has strict access restrictions

The calculator adds approximately 20% to 30% to labor.

Step 13: Add Arizona Climate and Location Adjustments

The calculator may apply geographic adjustments for unusual Arizona site conditions.

Standard Arizona Location

No additional multiplier is applied.

High-Elevation or Snow-Exposure Area

Choose this option for locations with greater snow, freeze, or ice exposure. Roofing work may require:

• Different underlayment
• Ice-barrier protection
• Snow-load evaluation
• Additional insulation
• More weather-resistant flashing

The calculator may add approximately 10%.

Hillside or Difficult Terrain

Choose this option when the property is located on a slope or difficult site. The calculator applies approximately 15% for increased equipment and labor difficulty.

Remote Rural Location

Select this option when the contractor and materials must travel a substantial distance. The calculator may add approximately 10% to 20% for mobilization, delivery, and crew travel.

Step 14: Add a Permit and Inspection Allowance

Roofing permits are controlled by the local authority responsible for the property. Permit requirements may depend on whether the project involves:

• Complete roof replacement
• Structural framing repair
• New roof-over framing
• Significant insulation changes
• Electrical or mechanical equipment
• Changes to roof height or drainage
• Work on an attached structure

Arizona’s Office of Manufactured Housing oversees safety standards for manufactured homes and factory-built structures, while local cities and counties may administer permits for roofing or related alterations. Requirements vary by jurisdiction. The calculator provides a permit allowance rather than determining whether a permit is legally required. Select:

• No allowance
• Basic permit allowance
• Permit and inspection allowance
• Structural review allowance

Verify current requirements with the Arizona Department of Housing and the relevant city, town, county, or tribal authority before work begins.

Step 15: Add a Roofing Contingency

A contingency helps cover hidden damage and changes discovered after the roofing is opened. Use:

• 10% for a simple coating or roof-over on a roof in good condition
• 15% for a standard replacement
• 20% for an older roof with known leakage
• 25% or more for severe deterioration or structural concerns

A roofing contingency may cover:

• Additional decking
• Wet insulation
• Rotten framing
• Flashing changes
• Extra tear-off
• Material price changes
• Permit corrections
• Drainage repairs

Step 16: Calculate the Mobile Home Roofing Cost

After entering the project information, select Calculate Cost. The calculator displays:

• Estimated roof area
• Roofing material quantity
• Material cost
• Roofing labor cost
• Tear-off and disposal cost
• Roof-deck repair allowance
• Insulation cost
• Flashing allowance
• Access and location adjustments
• Permit allowance
• Contingency
• Estimated total roofing cost
• Likely budget range

Example Mobile Home Roofing Cost Calculation

Consider the following Arizona mobile home roofing project:

• Mobile home length: 70 feet
• Mobile home width: 16 feet
• Roof overhang: 1 foot on every side
• Roof pitch: low slope
• Project type: complete replacement
• Material: TPO membrane
• Waste factor: 10%
• Existing roof: single-layer tear-off
• Deck condition: minor repairs
• Insulation: rigid insulation board
• Flashing: moderate
• Access: easy
• Location: standard Arizona site
• Permit allowance: $500
• Contingency: 15%

Calculate the Adjusted Roof Dimensions

Adjusted length: 70 + 1 + 1 = 72 feet Adjusted width: 16 + 1 + 1 = 18 feet

Calculate the Roof Area

72 × 18 = 1,296 square feet A low-slope pitch multiplier of 1.00 is used: 1,296 × 1.00 = 1,296 square feet

Add the Roofing Waste Factor

1,296 × 1.10 = 1,425.6 square feet Round the material quantity to: 1,426 square feet

Calculate the Base Roofing Cost

Assume an installed TPO rate of $8 per square foot: 1,426 × $8 = $11,408

Add Tear-Off

Assume single-layer removal costs $1.50 per square foot: 1,296 × $1.50 = $1,944

Add Roof-Deck Repairs

Assume the calculator includes a minor deck-repair allowance of: $1,000

Add Insulation

Assume rigid insulation costs $2.50 per square foot: 1,296 × $2.50 = $3,240

Add Flashing Work

Assume a moderate flashing allowance of: $750

Calculate the Project Subtotal

$11,408 + $1,944 + $1,000 + $3,240 + $750 = $18,342

Add the Permit Allowance

$18,342 + $500 = $18,842

Add a 15% Contingency

$18,842 × 15% = $2,826.30 Estimated total: $18,842 + $2,826.30 = $21,668.30 The likely calculator range would be approximately:

• Low estimate: $19,501
• High estimate: $26,002

This example is for educational budgeting and is not a roofing-contractor quote.