Establishing secure connection…Loading editor…Preparing document…

Custom Doors Contract Addendum

This template is fully customizable. Edit the text, fill out the fields, and send it for signature. Give it a try!

CUSTOM DOORS CONTRACT ADDENDUM

This Addendum is made effective as of by and between Client Name: and Contractor Name: .

WHEREAS

WHEREAS, the parties entered into a Custom Doors Installation Agreement dated (the "Original Agreement"); and

WHEREAS, the parties desire to amend the Original Agreement to describe changes to the scope of work, payment terms, schedule and certain other terms as set forth in this Addendum.

NOW, THEREFORE, in consideration of the mutual covenants contained herein and other good and valuable consideration, the sufficiency of which is acknowledged, the parties agree as follows:

1. Purpose

This Addendum modifies and supplements the Original Agreement only to the extent expressly set forth below. All provisions of the Original Agreement not modified by this Addendum remain in full force and effect.

2. Scope of Work

3. Change Orders; Materials; Permits

All work described in this Addendum shall be performed only upon written change order signed by both parties. Any deviation from the Scope of Work must be memorialized in a written change order that specifies price and schedule adjustments. Contractor shall obtain permits necessary for the additional work unless otherwise specified.

4. Payment Terms

In consideration of the additional work set forth in this Addendum, Client shall pay Contractor an additional sum of: $ (the "Addendum Amount").

Deposit required: Yes     Deposit amount: $     Due by:

Late payment: any unpaid invoice shall accrue interest at or the maximum lawful rate, whichever is lower. Contractor may suspend work after seven (7) days' written notice for nonpayment.

5. Schedule; Term and Termination

Start of additional work: . Estimated completion date for the additional work: .

This Addendum commences on the Addendum effective date and terminates upon completion of the described work and final payment, unless earlier terminated in accordance with this section. Either party may terminate this Addendum for material breach if the breaching party fails to cure within days after written notice. Termination shall not relieve Client of payment obligations for work performed prior to termination.

6. Warranties

Contractor warrants that materials supplied and workmanship for the additional work shall be free from defects for a period of months from substantial completion, subject to the Original Agreement's warranty provisions. This warranty does not cover normal wear and tear, misuse, or damage resulting from alterations by others.

7. Confidentiality

Each party shall maintain in confidence all nonpublic information disclosed in connection with this Addendum and the additional work for a period of years from disclosure, except to the extent disclosure is required by law or necessary to perform obligations under this Addendum. Confidential information shall not include information that is or becomes publicly known without breach of this Addendum.

8. Liability; Insurance

Contractor shall maintain insurance consistent with the Original Agreement. Except as expressly provided in this Addendum, neither party shall be liable to the other for incidental or consequential damages, except to the extent such limitation is unenforceable under applicable law.

9. Governing Law; Dispute Resolution

This Addendum shall be governed by and construed in accordance with the laws of the State of without regard to conflict of laws principles. Any dispute arising under this Addendum shall be resolved in accordance with the dispute resolution provisions of the Original Agreement or, if none, by binding arbitration in the governing state.

10. Entire Agreement; Effect on Original Agreement

This Addendum, together with the Original Agreement, constitutes the entire agreement between the parties with respect to the subject matter hereof. In the event of any conflict between the terms of this Addendum and the Original Agreement, the terms of this Addendum shall control solely with respect to the subject matter modified herein.

11. Miscellaneous Provisions

All notices required under this Addendum shall be given in writing to the addresses set forth in the Original Agreement or such other addresses as the parties may designate in writing. If any provision of this Addendum is held unenforceable, the remaining provisions shall remain in full force and effect.

Client Name:

By:

Date:

Contractor Name:

By:

Date:

Enter text✕
Prepare your document for signing right on this page
  • 01 Edit the text and complete the fields
  • 02 Click Sign Now and on the next screen add recipients and signature fields in SignNow
  • 03 Start your free trial to sign and send your doc
Sign Now

What the Custom Doors Contract Addendum Is and When It Applies

A Custom Doors Contract Addendum is a written amendment attached to a primary contract that modifies scope, specifications, delivery timing, pricing, or acceptance criteria specifically for custom door products or installations. It documents agreed changes without rewriting the original agreement, provides a clear record of revised obligations among supplier, contractor, and owner, and typically references the base contract by date and section to preserve continuity and enforceability in case of dispute.

Why Use a Custom Doors Contract Addendum

A tailored addendum clarifies custom scope and pricing, reduces disputes by recording approvals, and preserves the original contract’s structure for ease of enforcement under contract law and commercial practice.

Why Use a Custom Doors Contract Addendum

Who Typically Prepares and Signs This Addendum

The document is most effective when prepared jointly, reviewed by legal or contract administrators as needed, and signed by authorized representatives from each party.

  • General contractors and subcontractors making scope adjustments for field conditions or owner requests.
  • Manufacturers and suppliers documenting custom material, lead time, or pricing changes.
  • Property owners or facility managers approving specification changes or delivery schedules.

Essential Elements to Include in a Professional Addendum

A complete addendum isolates the change, ties it to the original contract, and records consideration, dates, and signature authority so the amendment is enforceable and auditable.

Reference

Cite original contract title, parties, and effective date so the addendum attaches unambiguously to the base agreement.

Scope Change

Describe modifications (dimensions, materials, hardware, finishes) with enough detail that installers and suppliers can act without further interpretation.

Pricing

State the exact price change or pricing formula, including taxes, allowances, and whether amounts are lump-sum or unit-based.

Schedule

Specify revised delivery or installation dates, lead times, and any liquidated damages or delay allowances.

Acceptance Criteria

Define inspection points, testing, and warranty adjustments tied to the custom components or workmanship.

Signature Block

Include printed names, titles, signature lines, and date fields for all authorized signatories and any required witness or notary lines.

Step-by-Step: Completing the Addendum

Follow these steps in order to produce a clear, enforceable amendment and reduce the need for follow-up negotiation or rework.

  • 01
    Identify Base Agreement: Confirm contract title and date before drafting the amendment.
  • 02
    Describe Changes: Write precise specifications, referencing drawings or exhibits.
  • 03
    Calculate Consideration: Set exact amounts and payment milestones.
  • 04
    Collect Signatures: Obtain authorized signatures and dates from all parties.

How the Addendum Fits Into Contract Workflows

Use this simplified workflow to route the addendum from drafting through approval, signature, and execution.

  • Draft: Author drafts addendum and attaches exhibits or drawings.
  • Review: Legal, procurement, and project leads review and mark changes.
  • Approve: Authorized approvers sign and date the addendum.
  • Execute: File executed copy with contract records and distribute to stakeholders.

Typical Digital Workflow Settings for Online Completion

Configure these fields in your document platform to capture required data, enforce sequencing, and preserve an audit trail for compliance.

Field Configuration
Signature Order Sequential signing with approver first
Authentication Email + SMS code for external signers
Required Fields Make scope, price, and effective date mandatory
Attachments Enable PDF exhibits and photos upload

Delivery and Signing Options for Electronic Completion

Confirm platform compliance for your industry (for example HIPAA for healthcare workflows) and retention policies before finalizing the execution method.

  • File Formats: PDF, DOCX, and image files are commonly supported
  • Integrations: Connectors to document storage and ERP systems aid version control
  • Authentication: Email link, SMS code, or stronger methods are available

Common eSignature Vendor Considerations for Addendum Execution

Compare basic vendor attributes that matter when choosing an eSignature tool to execute contract addenda; signNow is listed first in accordance with available product data.

signNow DocuSign Adobe Sign PandaDoc HelloSign
Starting Price $8/user/mo $15/user/mo $14/user/mo $19/user/mo $15/user/mo
Free Trial 7-day free trial Varies Varies Varies Varies
Bulk Send Yes Yes Yes Yes No
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes Yes Yes No No

Security and Compliance Considerations for Electronic Execution

Encryption: TLS 1.2/1.3 and AES-256 at rest
Certifications: SOC 2 Type II and ISO 27001 available
HIPAA: Compliant; BAA required
21 CFR Part 11: Supported for regulated records
ESIGN/UETA: Meets federal and state eSignature law
Audit Trail: Timestamps, IP, and action logs preserved

Common Legal Risks and Contractual Consequences

Unclear Scope: Leads to payment and warranty disputes
Missing Authorization: Signature by unauthorized person may void amendment
Incorrect Dates: Can shift responsibility for performance
Improper Notarization: May prevent record acceptance in some jurisdictions
Tax Reporting: Unreported consideration can trigger IRS issues
Record Retention: Failure to retain may hamper legal defense

Frequent Preparation Problems to Watch For

  • Vague technical descriptions that require contractor interpretation and lead to change claims or rework on site.
  • Assuming oral approvals are binding without contemporaneous signed documentation creating enforcement gaps.
  • Using initials instead of full signatures when the document or counterparty requires corporate officer signatures.
  • Failing to attach or reference updated drawings or product specifications required to fulfill the revised scope.

Typical Timeframes and Deadlines in Addendum Workflows

Establish clear timelines for approval, fabrication, and installation to coordinate lead times and avoid delay claims.

Approval Window:

Allow 5–10 business days for internal approvals and shop drawing review

Fabrication Lead Time:

Specify manufacturer lead times (for example, 2–8 weeks depending on customization)

Delivery Window:

State exact delivery date or allowable delivery window (MM/DD/YYYY format)

Installation Schedule:

Coordinate on-site installation dates and required access windows

Warranty Start:

Tie warranty start to acceptance or installation completion date

Key Milestones from Draft to Execution

Track these milestones to keep the addendum on schedule and to trigger payments or production steps.

01

Draft Prepared

Author prepares addendum and attaches exhibits for review

02

Internal Review

Procurement, project, and legal review for compliance and cost impact

03

Counterparty Approval

Counterparty reviews and signs or requests revisions

04

Execution Filed

Execute, distribute, and file the signed addendum

Real-World Examples of Addendum Use

These examples illustrate common scenarios where an addendum resolved scope, schedule, or cost issues efficiently.

Case Study 1

A property manager requested custom acoustic doors for a renovation project to meet tenant requirements.

  • The contractor issued an addendum with revised pricing and a 30-day lead time.
  • The executed addendum clarified acceptance testing and warranty, avoided a work stoppage, and provided a clear basis for invoicing and payment.

Case Study 2

A general contractor encountered unexpected framing that required different door jambs.

  • Parties negotiated a scope and price change using an addendum.
  • The addendum referenced drawings, adjusted the schedule, and captured approval signatures so the manufacturer could proceed without delaying the overall project timeline.

Best Practices for Clear, Enforceable Addenda

Adopt consistent formatting, version control, and signatory verification to limit ambiguity and support enforceability.

Use Exhibits
Attach or reference detailed drawings and part lists to eliminate interpretive gaps and provide objective acceptance criteria.
Number Revisions
Assign amendment numbers and dates to maintain a clear audit trail and avoid confusion with earlier modifications.
Confirm Authority
Obtain signatures from individuals with contractual authority and note their title to prevent later repudiation.
Preserve Originals
Store executed originals or certified electronic copies in your contract repository and ensure retention meets regulatory requirements.

Frequently Asked Questions About Executing an Addendum

Answers to common questions about validity, notarization, eSignature, and post-execution handling of addenda.


Need help? Contact support

be ready to get more
Join over 28 million airSlate SignNow users
Sign Now
Company
Forms
Pricing
Resources
Knowledge base
Other Products
© 2026 airSlate Inc. All rights reserved.