Replacement Doors

Secure, stylish and made to measure for your home.

Replacement Door Installers Grantham

A good door should look the part, lock properly and feel solid every day. We install high quality front and back doors across Grantham, Stamford, Sleaford, Newark, Bourne, Melton Mowbray and nearby villages. Every door is measured for your opening and fitted neatly by our local team.

Door Fitters Grantham

Why Homeowners Choose Their Doors With Avanti

Security first

Quality slabs and profiles, multi-point locking and robust hinges. Toughened or laminated glass where needed.

Warm and efficient

Weather seals and high performance glazing reduce draughts and road noise.

Built to last

Durable skins and powder-coated finishes with hardware you can service, not replace in a year.

Neat installations

Floors protected, edges sealed cleanly, old frames removed and recycled where possible.

Door Styles We Supply and Fit

Use these as clickable cards linking to child pages. Each child page can go deeper on colours, glass, hardware and thresholds.

Composite Front Doors

A solid, secure entrance with classic or contemporary styles. Wood-grain or smooth finishes, wide colour range, decorative or privacy glazing, and quality hardware that feels right in the hand.

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Aluminium Bi-Fold Doors

A solid, secure entrance with classic or contemporary styles. Wood-grain or smooth finishes, wide colour range, decorative or privacy glazing, and quality hardware that feels right in the hand.

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Sliding Patio Doors

Large panes, minimal frame and effortless operation. Ideal where space is tight inside but you still want that big garden view.

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French Doors

A timeless pair for kitchen diners and garden rooms. Symmetrical look, secure locking and optional side panels for extra light.

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Aluminium Entrance Doors

Crisp, modern lines with a premium feel. Powder-coated finishes, flush panels and designer hardware. Perfect for contemporary refurbishments.

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Energy, Security and Everyday Comfort

Thermal performance
Composite slabs and thermally broken aluminium frames help achieve low U-values. Fewer draughts, warmer hallways and lower heat loss.

Security
Multi-point locking as standard, anti-bump cylinders where specified, reinforced hinges and hook bolts. Laminated glass for side panels and larger panes.

Noise reduction
Better seals and the right glazing reduce outside noise on busier roads.

Accessibility
Low thresholds available for smooth transitions. We’ll explain options during survey.

Installation: How We Work in Your Home

We know people worry about two things: mess, and being sold to. Here’s how we handle both.

Survey and advice

We measure properly, check clearances and talk through styles, colours, glass and hardware. It is a conversation, not a sales pitch

Clear written quote

Clear product spec, lead times, hardware choices and warranty. No vague “from” pricing.

Made to measure

Built to your sizes for neat lines, reliable locking and good weathering.

Tidy fitting

Floors protected. Old frames taken out carefully. Edges sealed and trims finished cleanly. Waste removed the same day.

Aftercare

If you need anything, you speak to the same friendly team who fitted your door.

Recent Installations

Serving Grantham, Stamford, Sleaford, Newark, Bourne, Melton Mowbray and nearby villages.

FREQUENTLY ASKED QUESTIONS

FAQs (Doors)

How secure are your doors

Very secure. Multi-point locking, robust hinges and quality cylinders come as standard. We can specify laminated glass in side panels and larger panes.

Yes. Composite and aluminium systems with proper seals reduce draughts and heat loss compared to older timber or first-generation uPVC.

Bi-folds stack to one side for a wide opening. Sliders keep larger panes of glass and slimmer sightlines. If you want the biggest opening, choose bi-folds. If you want the most uninterrupted view, choose sliders.

In most cases, yes. There is a wide palette of colours and hardware finishes. We will bring samples to your survey.

Like-for-like replacements usually do not. If you are changing size or adding a new opening, we will advise before anything is ordered.

Yes, when specified correctly. We will explain the pros and cons of each threshold type so you balance access and weather performance.

A single front door is often completed in a few hours. A set of bi-folds or sliders usually takes half a day to a day depending on access. You will get a realistic schedule with your quote.

Yes. We take away old frames, panels and packaging and leave everything tidy.

Ready for a Clear, Fixed Price

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