• Made to order in our Kent workshop
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Alu-clad timber window with a bronze finish in a timber clad wall
Bronze alu-clad windows framing a living room with a grey sofa
UK Delivery

Nationwide

UK Delivery
Lead Times

Lead Times

6 – 8 Weeks
South East Install

Installation

South East UK
Finance

Finance

From 10.9% APR

Made to measure

Bespoke Alu-Clad Windows

Alu-clad windows are a union of natural timber warmth and robust aluminium protection, offering a window that is as practical as it is beautiful. At Spittlywood, we design and build bespoke alu-clad windows that bring the character of traditional woodwork to your home without the demands of regular upkeep. Each window has a solid timber interior for natural insulation and lasting appeal, paired with a precision-formed aluminium exterior that shields against the elements for decades.

Made by skilled joiners in our Kent workshop using CNC engineering and careful hand finishing, every alu-clad window is built to perform across all seasons while complementing the character of your property.

At a glance

Timber

Accoya or Red Grandis

Glazing

Double, triple or vacuum

U-values

From 0.7 W/m²K

Security

PAS 24, Secured by Design

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Brochure

Download our brochure

View our range of bespoke timber windows & doors.

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Accredited and certified

Kent Trading Standards
Fensa
PAS24
UKCA
Secured By Design
FSC
ISO 9001
ISO 50001
ISO 14001

Specification

Make it yours

In design and application

Versatility In Design
The wood and aluminium system combines engineering, aesthetic range and sustainable performance:

Adaptable to your architecture

The alu-clad system offers a broad selection of designs and finishes, so it suits a range of architectural styles. Whether you want a sleek modern look or something more traditional, the windows can be made to fit.

Wood inside, aluminium outside

The aluminium exterior gives weather resistance and durability, while the timber interior gives natural insulation and the appearance of real wood in the room.

Finishes

Factory Finishes
Our finishes are done in house and we offer the following:

Opaque finishes

These coatings provide a flawless, uniform look in any shade. They offer maximum protection by blocking UV rays and sealing out moisture to prevent fading and timber movement.

Translucent finishes

Designed to showcase the wood’s natural grain and texture, these finishes provide a warm, organic aesthetic while maintaining a durable, weather-resistant shield.

RAL and custom colours

Choose from 147 standard colours or opt for our colour-matching service to RAL, British Standard, or NCS charts for a truly bespoke finish.

Factory finished

Every item is coated in a controlled factory environment before delivery. This ensures even coverage and superior adhesion for a professional, long-lasting result that on-site painting can’t match.

Glazing

Sash Glazing
We offer the following glazing options:

Standard double glazing

Unless a client requests an alternative specification, our joinery is typically supplied with 24 mm double-glazed units filled with Argon gas. In a unit of this thickness, alternative gases do not offer any meaningful improvement to thermal performance, so Argon represents the most effective and sensible choice in terms of insulation, reliability, and value.

Slim heritage units

For heritage properties or conservation areas with strict planning requirements, we offer slim double-glazed units. These are filled with Krypton gas, which performs more effectively than Argon in thinner cavities. This allows us to maintain slender, authentic profiles without sacrificing the thermal performance needed for a comfortable living environment.

Specialist and triple glazing

We offer a range of advanced glazing solutions for specific project needs. This includes triple glazing for superior acoustic and thermal insulation, as well as cutting-edge vacuum glazing. For those seeking an authentic period look, we can provide double-glazed units with drawn glass to recreate the subtle, classic distortions found in historic windows.

Technical

Head and jambs

93mm x 57mm

Cill

93mm x 68mm

Transom and mullion

93mm x 68mm

Sash top rails and stiles

64mm x 57mm

Sash bottom rail

67mm x 57mm

Sash profile

Ovolo or Lambs Tongue

Cill projection

Flush, 35mm, 60mm, 85mm or 100mm

Trickle vents

Concealed through head, 4600EA

U-values, W/m²K (lower is better)

Double glazing

1.2

Triple glazing

0.9

Vacuum glazing

0.7

What you can expect

Why choose our alu-clad windows

Low maintenance

The aluminium exterior needs minimal upkeep, so you get the look and the function of timber without the regular maintenance.

High-quality finish

The aluminium is powder coated, so it can be finished in any RAL colour.

Increased longevity

The aluminium exterior takes the weather so the timber behind it does not, which is what gives an alu-clad window its long service life.

Premium quality

All our products are meticulously crafted by expert joiners using state-of-the-art machinery, computer-aided precision and finished by hand.

Sustainable

We use sustainable materials in our windows, including recyclable aluminium and energy-efficient glass, to minimise environmental impact.

Energy efficiency

Our windows are designed to reduce energy consumption and lower your carbon footprint.

Working with us

Heritage, trade and installation

Listed and heritage

Curtain Walling

Heritage and conservation

Curtain walling

Our aluminium-clad timber curtain walling is strong, robust and attractive, and can be engineered to withstand considerable loads. The range of finishes means the curtain walling can be matched to the style of the home or premises. We can:

Engineer for considerable structural loads

Match finishes across windows and walling

Work to an architect’s specification

Supply for homes and commercial premises

Materials

Bespoke Alu Clad Windows in Kent

Materials

Sustainable materials

We manufacture our alu-clad windowss using premium, sustainably sourced timbers, including hardwoods, softwoods and Accoya. These materials offer exceptional durability, weather resistance and long service life. Accoya and Red Grandis are among our most recommended choices thanks to their outstanding stability and low-maintenance performance.

The combination of quality timber and proven manufacturing techniques ensures that each alu-clad windows remains dependable for decades, with minimal maintenance required to stay looking its best.

Bespoke joinery design

Expert craftsmanship and installation

Sustainable timber and finishes

Trade partners

Inside the Spittlywood joinery workshop in Hamstreet, Kent

Team up with Spittlywood

Become a Trade Partner

We build trade partnerships with trusted professionals to deliver the best quality products and services.

Monthly DWG files

Part Q compliant blueprints

Trade pricing

Competitive trade account rates

Specification advice

Help choosing the right product

Installation advice

Support from our team

Account manager

Dedicated, after your first order

White-label brochure

To share with your customers

Find out more

Delivery and installation

Alu Clad Windows Supply & Install

Across the South East

Installation across the South East

We deliver across the UK, with installation available throughout Kent, London and the South East. Whether you are a homeowner, architect, builder or developer, our team is on hand to help with technical specifications, planning requirements and design choices.

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FAQs

Alu-clad

Still have questions?

01233 730816

[email protected]

Planning and surveys

Do you provide section drawings for planning permissions?

Yes, we can supply detailed drawings and specifications for planning, conservation or building regulation approval.

Do you offer site surveys?

Yes, we provide a full site survey before production to make sure the fit is accurate.

Timber and finish

Do you recommend any particular timber?

We strongly recommend Accoya and Red Grandis for all our joinery. Both are sustainable, durable and proven to deliver exceptional performance and longevity.

Are you an Accoya Approved Manufacturer?

Yes, Spittlywood is an Accoya Approved Manufacturer, which keeps quality and consistency the same on every project.

Security and glazing

Do you offer triple glazing?

Yes, triple glazing is available across all our window and door types.

Supply and lead times

Do you deliver and install across the UK?

Yes, we deliver nationwide. Installation is available across Kent, London and the South East.

What are your typical lead times?

Typically 6 to 8 weeks from confirmed order and deposit, depending on size and specification.

Our range

Windows and doors

All products

Next steps

Ready to start your project?

Send us your sizes, or your drawings, and we will come back with an estimate. Everything is made to order in our Kent workshop, with a lead time of six to eight weeks.

Request an estimate
Download the brochure