The Complete Xactimate Supplement List for Roofing Contractors: 100+ Line Items Adjusters Routinely Skip

Every storm restoration roofing contractor knows the feeling: you've just submitted what you thought was a comprehensive Xactimate estimate, and the adjuster comes back with a check for 40% less than expected. The reason? They're using the baseline Xactimate line items, not the supplements that reflect real roofing costs and local building codes.

The Xactimate supplement list is your roadmap to getting paid fairly. This guide covers the 100+ most commonly missed line items in roofing estimates—from starter course shingles and ice & water shield upgrades to waste factor disputes and steep-pitch premiums. These aren't obscure codes; they're the bread-and-butter supplements that separate contractors who consistently get approved estimates from those who don't.

Roofing Materials (RFG Codes): The Foundation of Every Supplement

The RFG category is where most adjusters expect to see line items. But even here, contractors miss opportunities. Here's what gets left on the table.

Starter Course Shingles (RFG-22 or RFG-23 variants)

Starter shingles cost 15-20% more than standard shingles, but many baseline estimates use the same pricing for both. The supplement should reflect the actual starter course product you're installing, not the field shingle price. Make sure your line item specifies "starter course" with the corresponding upgrade cost.

Synthetic Underlayment Upcharge (RFG-26 upgrades)

Synthetic underlayment is now standard in most jurisdictions, but Xactimate's baseline often defaults to 15 lb. felt. The upcharge from felt to synthetic can be $0.15–$0.40 per square foot. This adds up quickly on a 30-square roof. Specify the product (Synthetic Underlayment – Premium Grade) and the unit cost difference.

Premium Grade Shingles

If the loss calls for architectural or premium shingles instead of 3-tab, you need a separate line item. The difference is typically $0.50–$1.50 per square foot. Adjusters won't assume an upgrade; you have to document it with photographic evidence of neighboring homes or specifications from the homeowner.

Dimensional vs. 3-Tab Variance

Even within the same brand, dimensional shingles cost more than 3-tab. Use the RFG code that matches the shingle type being replaced, not the most economical option.

Algae-Resistant or Extended-Warranty Shingles

In humid climates, algae-resistant shingles are often locally standard. If the loss occurred in an area where homeowners typically replace with algae-resistant products, this becomes a legitimate code upgrade supplement. Document with local market comparables.

Flashing & Penetrations (FLT Codes): Where Adjusters Cut the Deepest

Flashing is the single most commonly underbid category in Xactimate estimates. Adjusters have limited training on what's actually required, and they rely on baseline pricing that doesn't account for multiple flashing types or re-flashings during a full tear-off.

Step Flashing (FLT-02 series)

Step flashing is measured in linear feet, and the unit price varies dramatically based on material (aluminum, copper, lead-coated copper) and gauge. Baseline Xactimate often prices aluminum step flashing at $1.50–$2.00 per linear foot. If you're replacing chimney flashing that includes copper or lead-coated copper, supplement the difference. For a 12-foot chimney, you could be looking at $100–$200 additional.

Chimney Flashing (FLT-01, FLT-03)

Chimney flashing involves multiple components: apron flashing, saddle/cricket flashing, counter flashing, and step flashing. Xactimate's baseline often prices a "chimney flashing kit" at $150–$300, but a complete re-flashing typically includes all four elements. Each component may need separate line items, particularly the saddle or cricket flashing, which can run $200–$500 for labor and materials.

Chimney Cricket / Saddle Flashing

If the chimney is wider than 30 inches and sits on a roof slope, building codes typically require a cricket. This is expensive—around $300–$600—and gets left off baseline estimates regularly. Always include when the chimney configuration warrants one.

Valley Flashing (FLT-04, FLT-05)

Valley flashing can be open, closed (woven), or California-style. Material upgrades from open aluminum ($2.00/LF) to standing-seam copper ($8.00+/LF) represent major cost differences. Specify the valley type and material in your line item, as baseline Xactimate defaults to the cheapest option.

Pipe Jacks / Plumbing Boot Replacement (FLT-06, FLT-07)

Standard rubber pipe jacks are cheap ($3–$8), but metal flashing bases with rubber boots are $12–$25. On a roof with 6–10 penetrations, this is a legitimate supplement. Also note that old rubber boots often need replacement; don't assume the baseline accounts for all penetration updates.

Roof-to-Wall Flashing (FLT-08)

Where the roof meets a vertical wall (common in dormers, add-ons, and 1.5-story homes), proper flashing includes base flashing and counter flashing. This detail is frequently under-priced or omitted entirely in baseline estimates. Cost ranges from $3.00–$8.00 per linear foot depending on material and complexity.

Ridge Vent Flashing (FLT-09 or RFG-related)

If replacing ridge vents, the flashing component is often listed separately from the vent itself. Metal ridge vent flashing can cost $1.50–$3.00 per linear foot. Confirm the baseline includes flashing, or supplement it separately.

Skylight Flashing (FLT-10)

Skylight flashing kits range from $100–$500 depending on size and material. The baseline often includes a generic "skylight flashing" price that doesn't account for curb-mounted vs. frame-mounted variations or the specific skylight brand.

Lead-Lined Flashing Upgrades

In jurisdictions where copper or lead-coated copper is standard for high-end homes, you may need to supplement the flashing material. Lead-coated copper step flashing runs $3.00–$5.00 per linear foot vs. $1.50–$2.00 for aluminum.

Gutters & Gutter Accessories: Often Forgotten, Always Costly

When a roof is torn off during restoration, gutters often need to be detached, reset, or replaced. These line items get dropped from estimates more often than not.

Detach & Reset Gutters (GUT-01 variants)

When replacing a roof, gutters must be removed, set aside, and reinstalled. Labor for detaching and resetting is typically charged per linear foot ($0.50–$1.50/LF) or as a lump sum. A typical ranch-style home with 100–150 LF of gutters runs $50–$200 in detach/reset labor, but this line item is frequently omitted from baseline estimates.

Replace Damaged Gutters (GUT-02)

If gutters are damaged during storm or removal, supplement with replacement costs. Aluminum seamless gutters run $3.00–$6.00 per linear foot installed. This can easily be $300–$900 on a full house if multiple sections need replacing.

Replace Gutter Hangers / Brackets (GUT-03)

Old spike-and-ferrule hangers are often replaced with clip-style hangers during restoration. Material and labor for hanger replacement is $0.25–$0.75 per linear foot. On a 150 LF house, that's $40–$110.

Downspout Detach, Reset, or Replace (GUT-04)

Like gutters, downspouts need removal, storage, and reinstallation. Labor runs $0.75–$2.00 per linear foot. If any sections are damaged or need relocation, replacement costs apply ($1.50–$3.00/LF for aluminum downspout).

Gutter Guards / Leaf Protection (GUT-05 or GUT-06)

While not always appropriate, gutter guards are sometimes installed during restoration. If specified by the homeowner or part of the work, this supplements the estimate at $1.00–$2.50 per linear foot.

Clean Gutters & Downspouts (GUT-07 or as General Labor)

Gutters need cleaning before reset. This labor is sometimes missed but should be included. Pricing is $0.10–$0.25 per linear foot or as a lump sum ($25–$75).

Code Upgrades & Ventilation: Building Code Compliance Adds Up

Building codes for roofing have tightened significantly in the past 10 years. Energy codes, ventilation requirements, and wind-resistance standards often trigger supplements when replacing to current code.

Ice & Water Shield Supplementation (RFG-26 variants or separate)

Ice and water shield (also called ice damming protection) is now required by code in many jurisdictions for the first 3–6 feet of roof above the exterior wall. The baseline Xactimate may include a standard felt underlayment price, but ice & water shield costs $0.35–$0.65 per square foot more than felt.

On a 30-square roof where the baseline 3 feet of eave coverage is 1,500 sq. ft., the upcharge alone is $525–$975. This is a critical supplement and frequently disputed by adjusters who don't understand code-driven pricing.

Ventilation Requirements (RFG-28, RFG-29, or separate VEN codes)

Energy codes typically require minimum roof ventilation (1 square foot of ventilation per 150 square feet of attic space). If the loss is in an area with updated energy codes, supplementing for proper ventilation may be necessary. Ridge vents typically cost $1.50–$3.00 per linear foot, while soffit vents run $2.00–$4.00 per linear foot.

Drip Edge by Code (RFG-27 or FLT-related)

Updated building codes often require drip edge on all roof edges. Baseline estimates sometimes omit this entirely or price it at bare minimum. Proper drip edge costs $0.05–$0.15 per linear foot. On a 1,500 sq. ft. roof (average perimeter of 180 LF), this adds $10–$30 to materials, but the supplement is legitimate when code-driven.

Attic Insulation or Ventilation Damage (separate line items)

Storm damage sometimes affects attic ventilation or insulation. If the loss exposed inadequate ventilation or damaged soffit vents, supplementing for proper ventilation installation is appropriate and often overlooked.

Wind Mitigation Upgrades

In high-wind areas (Gulf Coast, Great Plains), wind-resistant fastening and underlayment upgrades may be required by code or insurer standards. These include additional fasteners, wind-resistant underlayment, and hurricane ties. Costs vary widely but typically add $0.25–$0.75 per square foot.

Overhead & Profit (O&P): The 3-Trade Rule and Commission Structure

Overhead and profit (O&P) is one of the most complex and commonly disputed supplements in Xactimate. Understanding the rules is critical to getting paid fairly.

The 3-Trade Threshold

Most insurance carriers allow full overhead and profit (typically 20–30% of labor) only when three or more trades are involved. A roof-only job may qualify for reduced O&P or no O&P at all, depending on the carrier's guidelines. If your job triggers the 3-trade threshold—roofing, gutters, flashing, and plumbing (from re-routed vent lines)—you can supplement full O&P on the roofing labor.

Pro tip: Document the trades involved. If gutter work is performed and plumbing line sets are affected, you meet the 3-trade threshold. This alone can add 15–30% to your total estimate.

General Contractor O&P vs. Subcontractor O&P

If the homeowner contracts directly with your company (not through a GC), you may be entitled to general contractor O&P on the full job, not just labor. This can add another 5–10% commission for managing the project. Conversely, if you're the sub to a GC, your O&P is typically limited to labor-only.

Material-Only vs. Labor-Only O&P

O&P is typically applied to labor, not materials. Some carriers allow O&P on demolition labor but not installation labor. Clarify the carrier's O&P rules before building your supplement. Xactimate allows you to apply O&P selectively to specific line items.

Permit & Inspection Fees as O&P Triggers

If permits are required and approved, some carriers allow an additional 10% on the total job cost for permit coordination. This is a soft supplement that varies by carrier, but it's worth requesting when applicable.

Waste Factors & Material Overage: The Industry Standard vs. Adjuster Defaults

Waste factor disputes are among the most common supplement negotiations. Adjusters often default to 5–10% waste on shingles, but industry standards range from 10–15% depending on roof complexity.

Shingle Waste Factor (RFG-21 or RFG-22 line item quantity adjustment)

Complex roofs with multiple valleys, dormers, and penetrations generate 15–20% waste. Simple roofs might hit 10%. The baseline Xactimate assumes 0–5% waste on many jobs. Supplement the shingle quantity with a waste factor line item or increase the unit quantity to account for real-world waste.

On a 30-square roof with 10% waste, you're adding 3 squares of shingles. At $100–$150 per square, that's $300–$450 in material costs that justified by industry standards.

Underlayment Waste (RFG-26)

Underlayment waste is typically 5–8%, but baseline estimates often ignore it entirely. Supplement with a specific line item: "Underlayment Waste Factor – 8%".

Flashing Material Waste (FLT series)

Step flashing, ridge vent flashing, and other linear flashing materials generate 10–15% waste due to cuts and overlaps. If the estimate includes 200 LF of step flashing, supplement 20–30 LF for waste.

Labor Waste / Material Handling (separate line item)

Some contractors separate "material waste" (excess materials) from "labor waste" (extra labor due to complexity). If your job includes multiple roof planes, dormers, or penetrations, a "Material Handling & Waste Labor" line item at $0.50–$1.50 per square foot is legitimate.

Steep Pitch & Access Charges: Labor Premiums for Difficult Roofs

Roof pitch and accessibility directly impact labor costs. Adjusters often underestimate these premiums.

Steep Pitch Premium (RFG labor code with pitch multiplier)

Most Xactimate labor rates assume 6/12 pitch and standard accessibility. Roofs steeper than 8/12 typically justify a 15–25% labor premium due to safety requirements and reduced worker efficiency. Document the pitch with photos and supplement accordingly.

Very Steep Pitch (10/12 or higher) Premium

Roofs steeper than 10/12 may justify 25–50% labor premiums and require specialized equipment (roof jacks, harnesses, scaffolding). These premiums are legitimate and should be documented with photos and safety equipment invoices.

Multiple Stories / Height Premium

Two-story or higher homes require additional safety measures and reduced worker efficiency. A 15–20% labor premium is common for homes over 25 feet tall. This is often missed in baseline estimates that don't account for height.

Roof Access Restrictions (Limited Parking, Setback, HOA)

If the roof is difficult to access—steep driveway, limited parking, HOA restrictions, or setback from street—labor efficiency drops. Material staging becomes expensive and time-consuming. Supplement with an "Access Difficulty Premium" of 10–20% on labor.

Scaffolding or Roof Jack Labor (SCA or RFG labor line)

Scaffolding installation, roof jacks, and safety equipment are legitimate supplements. Pricing ranges from $200–$500 for basic roof jacks to $1,000+ for full scaffolding setups. Break these out as separate line items, not rolled into standard labor.

Miscellaneous Line Items: The Catch-All Supplements

Permit & Inspection Fees (PRM or GEN)

Roofing permits range from $100–$500 depending on jurisdiction and roof size. Inspection fees add another $50–$200. These are out-of-pocket costs and should always be supplemented as a line item with proof of payment or estimate from the local building department.

Satellite Dish, Antenna, or Other Equipment Detach/Reset (OTH or equipment-specific code)

Detaching and resetting satellite dishes, antennas, or other roof-mounted equipment is often forgotten. Labor ranges from $50–$200 per item. If the loss affects any roof-mounted equipment, supplement for detach and reset labor.

HVAC Line Sets or Exterior Ductwork Detach/Reset (OTH or HVAC-related)

If HVAC line sets or ductwork run across the roof area being replaced, they need detaching and resetting. This labor is typically $100–$300 depending on complexity. If not in the baseline estimate, supplement it.

Chimney Cleaning (CHM or separate service code)

When a chimney is re-flashed, it's common to also clean it. Chimney cleaning runs $150–$300 and is a legitimate supplement if the work is performed.

Debris Removal & Disposal (DEM or GEN)

Removing and disposing of old roofing material is a major cost driver—typically $0.75–$1.50 per square foot. Baseline Xactimate usually includes this, but verify it's adequate. Dumpster rental alone can run $300–$800 depending on location and debris volume.

Roof Cleaning (GEN or CLN)

Before new roof installation, cleanup labor ranges from $0.05–$0.15 per square foot. This may or may not be in the baseline estimate. Supplement if not included.

Storm Straps or Hurricane Tie-Downs (FAS or separate)

In high-wind areas, hurricane ties connecting roof trusses to walls are code-required. If not in the baseline estimate and code-required, supplement at $25–$100 per tie-down (materials and labor combined).

Attic Ventilation or Soffit Vent Replacement (separate VEN code or RFG-related)

Storm damage sometimes requires soffit vent replacement. New soffit vents run $2.00–$4.00 per linear foot installed. If multiple soffit vents are damaged, supplement them.

Roof Flashing Testing or Inspection

Some complex jobs benefit from roof flashing water testing or inspection after installation. While not always approved, if requested or required by the carrier, this is a legitimate supplement at $200–$500.

Building Your Supplement Strategy: The 10-Point Checklist

Creating a comprehensive Xactimate estimate requires systematic review. Use this checklist every time you build a supplement.

1. Category-by-Category Review

Don't rely on the baseline estimate structure. Go through every Xactimate category manually—RFG, FLT, GUT, etc.—and ask: "Is this item included? Is the price correct? Are there upgrades or supplements needed?"

2. Photograph Everything

Supporting documentation is critical for supplement approval. Photograph roof pitch, flashing conditions, chimney configuration, gutter damage, and any code-driven requirements. Adjusters rely on these photos to justify approvals.

3. Know Local Code Requirements

Building codes vary by municipality and update every 3–5 years. Ice & water shield, drip edge, ventilation, and wind-resistance requirements are code-driven, not optional. Keep a reference for your local jurisdiction's current code and cite it in your estimate comments.

4. Document the 3-Trade Rule

If your job includes roofing, gutters, and flashing (or roofing and other trades), note this in the estimate comments. The 3-trade threshold opens the door to full O&P supplements.

5. Apply Waste Factors Systematically

Don't default to Xactimate's waste factor. For complex roofs, add 10–15% waste to shingles and 5–8% to underlayment. For simple roofs, justify lower waste factors. Be consistent and documented.

6. Separate Labor from Materials

O&P and premium labor charges apply to labor, not materials. Make sure your supplement structure separates labor line items from material line items so O&P can be applied selectively.

7. Use Detailed Line Item Descriptions

Don't just say "Flashing Supplement." Say "Chimney Saddle Flashing – Copper, Material & Labor – 12 LF." Specificity wins supplement approvals.

8. Include Contingency Notes in Comments

Xactimate allows you to note conditions that might trigger additional costs. For example: "Roof framing inspection for rot or damage may require additional structural repairs." This sets the stage for supplemental estimates.

9. Verify Pricing Against Local Market Data

Xactimate pricing is national averages. Your local market may support higher prices for premium materials or labor. If your market data supports higher pricing, document it with local contractor quotes or invoices from recent jobs.

10. Submit Supplements with Supporting Data, Not Hope

Every supplement needs justification: code requirements, industry standards (like waste factors), local market pricing, or photographic evidence. Adjusters will approve reasonable supplements backed by evidence. They'll deny everything else.

The Most Commonly Disputed Supplements (And How to Win)

Ice & Water Shield Upcharge

Adjusters often deny this, claiming "felt was in the baseline." Your counter: "Building code Section R905.2.7 requires water-resistant underlayment for the first 24 inches." Cite the code and submit with photos of the eave condition.

Waste Factor on Shingles

Adjuster says: "We're allowing 5% waste, you're asking for 15%." Your counter: "Roof has 4 dormers, 3 valleys, and 8 penetrations. Industry standard for complex roofs is 12–15% waste per NRCA guidelines." Document complexity with photos.

Step Flashing Material Upgrade

Adjuster says: "Aluminum step flashing is fine." Your counter: "Existing flashing was copper. Like-for-like replacement per policy terms. Copper step flashing is industry standard for homes of this value." Use MLS data or neighborhood comparables.

Overhead & Profit on Labor

Adjuster denies O&P because "it's a roofing-only job." Your counter: "Job includes roofing, gutter work, flashing, and HVAC line set relocation. 3+ trades justifies O&P per carrier guidelines. Here's the detailed scope breakdown."

Detach/Reset Gutters

Adjuster says: "Gutters weren't damaged, why are you charging for removal?" Your counter: "Gutters must be removed to access the entire roof decking. Removal, storage, and reinstallation is standard practice per NRCA guidelines. Labor is industry standard at $X per LF."

Real-World Supplement Example: A 30-Square Roof with Flashing

Let's say you bid a 30-square roof with a chimney and 3 valleys in a municipality with updated building code requirements. Here's how a comprehensive supplement breaks down:

This is a realistic supplement breakdown for a moderately complex job. Without documenting these items, you'd be leaving nearly $4,000 on the table.

Final Thoughts: The Xactimate Supplement List is Your Competitive Edge

Adjusters aren't intentionally trying to underpay you. They're working with incomplete baseline estimates and lack deep roofing knowledge. Your job is to fill in those gaps with a comprehensive, well-documented supplement.

The contractors who consistently get approved estimates—and get paid what they deserve—are the ones who understand every Xactimate category, know their local building code requirements, and document their supplements with supporting evidence.

Use this guide as your checklist. Review it before every estimate. Photograph your roofs. Understand your local code. And don't assume the baseline estimate is complete. It never is.

The difference between a contractor who consistently supplements effectively and one who doesn't is about 30–40% in annual revenue. This isn't small money. It's business transformation.

Start with the high-value items: ice & water shield, waste factors, flashing upgrades, and O&P. Document them consistently. Over time, you'll develop a supplement process that becomes second nature—and your bottom line will thank you.