Understanding Quotes: How To Compare Window And Door Prices Fairly
Category: Windows & Doors
Author: Central Scotland Tradesmen
Published: 2026-03-02
What to look for in window and door quotes, hidden costs to watch for, and a comparison template to see beyond headline prices.
Making Fair Comparisons
Window and door quotes can vary enormously—sometimes by thousands of pounds for apparently similar work. But headline price isn't everything. Some quotes include items others charge extra for. Some companies offer better warranties. Understanding what's in each quote helps you compare fairly and avoid nasty surprises.
What Should Be In Every Quote
A complete window and door quote should itemise:
Products
- Frame material (uPVC, aluminium, timber, composite)
- Colour and finish
- Glazing specification (double/triple, A-rating, Low-E, gas fill)
- Number and size of each window/door
- Opening style (casement, sash, tilt-and-turn, etc.)
Hardware
- Handle type and finish
- Lock specification (multi-point locking, security rating)
- Trickle vents (if required)
- Letter plates, knockers, house numbers (for doors)
Installation
- Removal and disposal of old windows/doors
- Installation labour
- Internal and external finishing (trims, beads, sealant)
- Scaffolding or access equipment if needed
- Making good around frames
Administration And Compliance
- Building regulations certification (FENSA or similar)
- VAT
- Warranty and guarantee details
- Insurance-backed guarantee
Hidden Costs To Watch For
Some quotes look cheaper because they exclude items others include:
| Potential Extra | Typical Cost | Notes |
|---|---|---|
| Removal and disposal | £25-100 per window | Some quote separately, others include |
| Skip hire/waste disposal | £100-200 | If removal not included |
| Scaffolding | £200-500+ | Often needed for upper floors |
| Structural repairs | Variable | Damage found during removal |
| Making good | £50-150 per window | Plastering, decorating around frames |
| Building control | £50-150 | If not using FENSA-registered installer |
| Hardware upgrades | Variable | Chrome handles, enhanced locks |
| Glass upgrades | Variable | Acoustic, toughened, triple glazing |
Quote Comparison Template
Use this checklist to compare quotes on a like-for-like basis:
| Item | Quote A | Quote B | Quote C |
|---|---|---|---|
| Total price (inc. VAT) | |||
| Material | |||
| Frame type | |||
| Colour/finish | |||
| Glazing | |||
| Double/triple | |||
| Energy rating | |||
| Low-E coating | |||
| Gas fill (argon/krypton) | |||
| Hardware | |||
| Handle finish | |||
| Security locks | |||
| Trickle vents | |||
| Installation | |||
| Removal/disposal included | |||
| Making good included | |||
| Scaffolding included | |||
| Warranty | |||
| Frame guarantee | |||
| Glass guarantee | |||
| Hardware guarantee | |||
| Insurance-backed | |||
| Certification | |||
| FENSA registered | |||
| Building regs included |
Understanding Warranties And Guarantees
Standard Warranty Periods
| Component | Typical Duration | What's Covered |
|---|---|---|
| Frames | 10 years | Manufacturing defects, warping, discolouration |
| Glass/glazing | 5 years | Seal failure, condensation between panes |
| Moving parts | 1-2 years | Handles, hinges, locks |
| Powder coating (aluminium) | 10-25 years | Peeling, corrosion |
| Composite doors | 10 years | Warping, delamination |
Insurance-Backed Guarantee
This is crucial. An insurance-backed guarantee (IBG) protects you if the installer goes out of business. Standard industry cover is 10 years, up to £50,000.
FENSA-registered installers must offer an IBG. If an installer isn't FENSA-registered and doesn't offer insurance backing, their warranty may be worthless if they cease trading.
Always ask: "Is this guarantee insurance-backed? Who underwrites it?"
Warranty Vs Guarantee
A warranty is typically from manufacturer to installer. A guarantee is from installer to you. The distinction matters:
- If your installer closes, you may lose the manufacturer warranty (unless it explicitly transfers)
- The guarantee you sign is your actual protection
- Insurance backing is what really protects you long-term
Red Flags In Quotes
Be cautious if:
- Price seems too good to be true: Hidden extras likely to follow
- High-pressure sales tactics: "This price is only valid today"
- No itemisation: Just a total with no breakdown
- No insurance-backed guarantee: Warranty worthless if they go bust
- Not FENSA registered: You'll need to arrange building control separately
- Vague warranty terms: "Lifetime guarantee" without insurance backing is meaningless
- Large upfront deposit: Standard is 10-25%, more than 50% is risky
Questions To Ask Every Installer
- Are you FENSA registered? Can I see your registration?
- Is your guarantee insurance-backed? Who provides it?
- Does this quote include removal, disposal, and making good?
- Is scaffolding included if needed?
- What's the payment schedule? How much deposit?
- How long will installation take?
- What happens if you find structural problems during installation?
- Can I see examples of recent work or speak to previous customers?
Getting Good Value
The cheapest quote isn't always the best value. Consider:
- Quality: A better product may last longer and perform better
- Warranty: Strong guarantee coverage has real value
- Reputation: Established companies are less likely to disappear
- Workmanship: Poor installation undermines even good products
Getting three quotes from reputable local companies gives you a fair basis for comparison without chasing the absolute cheapest price.
Frequently Asked Questions
Should I always choose the cheapest quote?
No. Compare what's included, check warranties, and verify the installer is reputable and registered. The cheapest quote may have hidden extras or inferior products.
What deposit is normal?
10-25% is standard. Be cautious of companies wanting more than 50% upfront. Never pay the full amount before installation is complete.
How long should a quote be valid?
Most quotes are valid for 30-60 days. If a company pressures you to sign immediately, that's a red flag.
Do I need to use a FENSA installer?
Not legally, but it's strongly recommended. FENSA installers self-certify building regulations compliance and must provide insurance-backed guarantees. Without FENSA, you need to arrange building control yourself and may struggle to sell your home later.
Get Competitive Quotes
These Central Scotland window and door specialists offer transparent pricing and strong warranties:
Recommended Window And Door Specialists
- Thermashield Windows & Maintenance - Transparent pricing
- Dolan Windows and Doors - Detailed quotes
- All UPVC Windows & Doors - Comprehensive warranties
- Centiam Home Improvements - Clear breakdown of costs