Short answer: approve an exterior door replacement quote only after it states the exact rough-opening measurements, slab and frame type, glass package, energy rating, threshold, weatherstripping, lead-safe work, lock hardware, trim, disposal, finish work, and warranty terms.
Exterior door replacement is one of those projects where the ordering decision can lock in most of the cost. Once a custom size, glass style, swing direction, finish, and hardware prep are ordered, changing the scope can be expensive.
Energy.gov says door energy performance should be evaluated for the local climate and home design, and ENERGY STAR buying guidance emphasizes choosing certified products and installing them correctly. EPA also warns that renovation work in pre-1978 housing can create dangerous lead dust when painted surfaces are disturbed. Those details belong in the quote before approval.
Start With Measurements And Swing
The estimate should state whether the contractor measured the existing slab, frame, rough opening, wall thickness, threshold height, hinge side, inswing or outswing direction, and whether sidelights or transoms are part of the system.
Ask who is responsible if the ordered door does not fit. A quote that says “standard door” without measurements puts too much risk on the homeowner.
Separate Slab-Only From Prehung Door Work
A slab-only replacement keeps the existing frame. A prehung exterior door includes a new slab, frame, hinges, threshold, and usually weatherstripping. The quote should say which one is included.
Prehung replacement can solve more air leakage and alignment problems, but it may require interior trim removal, exterior trim work, threshold adjustment, and siding or stucco touch-up.
Confirm Energy Performance
The quote should identify the door material, core, glass area, glass package, low-e coating if used, U-factor, solar heat gain coefficient when relevant, and whether the product is ENERGY STAR certified for the home climate zone.
If the contractor mentions a federal tax credit, the estimate should state the exact product certification path and documentation the homeowner will receive. ENERGY STAR says exterior doors must be ENERGY STAR certified to qualify for the 25C federal tax credit.
Specify Threshold, Weatherstripping, And Air Sealing
Energy.gov weatherstripping guidance calls for weatherstripping the entire door jamb, choosing the right sweep and threshold, and making sure strips meet tightly at the corners without making the door difficult to close.
Your quote should describe the threshold, sill pan or flashing approach, door sweep, jamb weatherstripping, backer rod, sealant, insulation around the frame, and water management at the sill.
Address Lead-Safe Requirements
If the home was built before 1978, the quote should state whether EPA Renovation, Repair and Painting requirements apply, whether the firm is certified, and how paint disturbance, dust containment, cleanup, and disposal will be handled.
Exterior door work can disturb painted trim, thresholds, jambs, and siding. Do not accept a vague “remove old door” line on an older home without lead-safe language.
Define Hardware, Security, And Finish Work
The estimate should state lockset and deadbolt prep, bore sizes, hinge finish, handle set, smart lock compatibility, peephole, mail slot, closer, kick plate, storm door compatibility, and whether old hardware will be reused.
Finish work should be equally clear: interior casing, exterior brickmold, caulk, paint or stain, primer, patching, disposal, cleanup, and final operation test.
Exterior Door Quote Review Table
| Quote area | What to confirm | Why it matters |
|---|---|---|
| Measurements | Rough opening, wall thickness, swing, sidelight, threshold | Wrong ordering details can delay the job. |
| Door system | Slab-only or prehung, frame, hinges, threshold | The scope changes labor and air sealing. |
| Energy | Material, glass, rating, certification, climate fit | Performance depends on the whole door system. |
| Sealing | Weatherstripping, sweep, sill pan, insulation, sealant | Draft and water control happen at the edges. |
| Finish | Trim, paint, stain, hardware, cleanup, operation test | The visible result is more than the door slab. |
Questions To Ask Before Ordering
- Who measured the opening, and what measurements are on the order?
- Is this slab-only or prehung replacement?
- What door material, glass package, and energy ratings are included?
- Will the product qualify for any claimed tax credit or rebate?
- What threshold, sweep, weatherstripping, insulation, and sealant are included?
- Does EPA lead-safe work apply because the home was built before 1978?
- Are interior and exterior trim, painting, staining, and touch-up included?
- What hardware is included, and what is homeowner-supplied?
- What warranty applies to the product, finish, glass, hardware, and labor?
Red Flags In An Exterior Door Estimate
- The quote does not state slab-only versus prehung.
- Measurements are missing from the order record.
- The contractor claims energy savings but gives no product rating.
- Weatherstripping, threshold, and sill flashing are not described.
- The home is pre-1978, but lead-safe work is not mentioned.
- Paint, stain, trim, caulk, or disposal are excluded without separate pricing.
Quote check: before you order the door, make the contractor document the measurements, swing, product rating, sealing method, hardware, lead-safe requirements, and finish repair in writing.
Source Links
- Energy.gov: Doors
- Energy.gov: Weatherstripping
- ENERGY STAR: Residential Windows, Doors, and Skylights
- ENERGY STAR: Exterior Doors Tax Credit
- EPA: Lead Renovation, Repair and Painting Program
- FTC: How to Avoid a Home Improvement Scam
FAQ
Should I approve an exterior door quote before final measurements?
No. Approve only after the quote records the opening, swing, wall thickness, threshold, and any sidelights or transoms.
Is a slab-only replacement cheaper?
Often, but it only works well when the existing frame is square, sound, and properly sealed. A damaged frame may make a prehung replacement the better scope.
Should weatherstripping be listed separately?
Yes. Energy.gov guidance treats sweeps, thresholds, jamb weatherstripping, and tight corner contact as important parts of door performance.
When does lead-safe work matter?
If the home was built before 1978 and painted surfaces will be disturbed, ask whether EPA RRP requirements apply and whether the firm is certified.
What documentation should I keep?
Keep the quote, product label, certification details, warranty, hardware information, installation photos, and any tax credit or rebate paperwork.