What is an External Door Supplier (for Door Jambs)?

An External Door Supplier provides pre-hung external door jambs — the frames that support your external doors. These are crucial for creating the openings during framing and for weatherproofing entry points. External jambs are different from internal jambs because they are larger, heavier, and built for external conditions.


You’ll need these supplied before the bricklaying or cladding starts, so your carpenter can fit them into the wall frames or rough openings.

What does an External Door Supplier do?

Your supplier will complete works according to your agreed scope of supply.


Typically, they will:

  • Measure or confirm the door openings from your plans
  • Supply external timber or composite jambs suitable for external use
  • Offer optional weather seals, thresholds, or metal cappings
  • Provide delivery to site before external cladding or bricklaying begins
  • Sometimes supply matching entry doors if needed


They may also help specify correct jamb sizes for oversized or custom openings..

Tip: Don’t Forget About External Jambs

Order external jambs early — they often need priming or sealing before installation, and your bricklayer or cladding carpenter needs them on-site to build around them properly.


And always check: external jambs should be hardwood, H3-treated pine, or composite — not regular internal pine.

What to look for in an External Door Supplier

When reviewing quotes, look for:

  • Confirmation of jamb material (e.g., Merbau, H3 treated pine, PVC composite)
  • Clear sizes and profiles for each opening
  • Options for weather seals or thresholds
  • Delivery timelines matching your bricklaying schedule
  • Warranty details on materials, especially if exposed before installation


Suppliers who pre-prime or pre-seal the jambs are a big bonus to save time on-site.

Before You Begin: What You’ll Need Ready

To get quotes from External Door Suppliers for jambs, you’ll need:

  • External door schedule or plan with rough opening sizes
  • Specification of cladding or brickwork (to match jamb reveal size)
  • Preferred jamb material (hardwood, treated pine, composite)
  • Target install date (to align with external framing works)

Average Timeframe

For this task, Pros typically provide quotes within 7-10 business days.

When Can I Expect Quotes?

Timeframes often vary based on demand and the type of Pro you're engaging (e.g. a plumber). If additional communication or clarification is needed is needed, the quoting process may take longer.

 

Don't be alarmed if you don't receive quotes or communication from any Build Buddy Pros straight away. Some work is more complex and the Pro may need time to comprehend your documents or scope of work. Depending on the job, there may even be some work required by the Pro before they are able to quote (e.g. a site visit might be required).

 

If the average timeframe indicated here has passed, and you have not received any messages or quotes, please feel free to contact the Build Buddy Expert Guidance and Support team for an update on quoting for this task.

Frequently Asked Questions

  • Can’t my carpenter just build a jamb on-site?

    They can — but it’s more time-consuming and often more expensive. Pre-hung jambs save labour and improve quality.

  • Are door jambs standard size?

    Not always. Your wall thickness (e.g., brick veneer vs cladding) and door style can change the reveal depth and frame width needed.

  • Do jambs come painted?

    Most come raw or primed. Full painting usually happens later after installation.

How to Complete this Task?

STEP 1

Review and Adjust the Scope of Works

Timeframes may vary based on demand and the type of Pro you're engaging (e.g., a plumber). If additional communication or clarification is needed, the quoting process may take longer.

STEP 2

Confirm Required Documents Are Uploaded

Check that the following required document(s) are uploaded for this task. These are essential to proceed:

STEP 3

Update the Quality Assurance Checklist

Go to the Quality Assurance tab in this task and review the checklist. Edit any details to suit your project requirements. Being clear and upfront helps set expectations with the Pro. Updating the checklist before requesting quotes ensures everyone is aligned.

STEP 4

Request Quotes

Click the orange ‘Request Quotes’ button to start the quoting process.

STEP 5

Review the Quotes

Once you receive quotes:

  • Review each one carefully, including the payment schedule and any special terms
  • Download attached quote documents for detailed review
  • Check each Pro’s profile and read past client reviews

STEP 6

Communicate with the Pro

If needed, message or call the Pro to clarify details or negotiate terms.

STEP 7

Accept a Quote

Choose the quote that best suits your needs. Once you accept a quote, any other pending quotes will be automatically declined. An agreement will automatically be generated.

STEP 8

Complete the Tasks In Your App

New tasks will appear to guide you through this job — follow each step carefully. Make sure to use the Quality Assurance Checklist, and refer to your contract and final Scope of Works whenever needed.

NEED HELP?

Reach Out to Your Build Buddy Pro

If you have any questions or need a hand, your Build Buddy Pro is your best first contact. They’re a licensed expert in their field and can understand the ins and outs of your project. You can message them via the platform, or you can call them directly.


If you have already contacted your Build Buddy Pro and still need further assistance, the Build Buddy Expert Guidance and Support team are here to help. They will be able to guide you on your next steps or help you find answers to any questions you may have.