• Made to order in our Kent workshop
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White timber stormproof windows looking out over a stone terrace and garden
Stormproof timber windows framed by curtains in a sitting room
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 Stormproof Windows

Stormproof windows are designed to offer exceptional protection against the harshest British weather while preserving, and often enhancing, the character of your home. At Spittlywood, we combine traditional joinery techniques with modern engineering to create stormproof windows that balance strength, elegance and efficiency. Whether your property faces driving coastal winds, heavy rainfall or freezing winters, our stormproof range provides robust, long-lasting peace of mind without compromising on style.

Made using modern materials and time-honoured craftsmanship, these windows perform in both contemporary and period properties. Their refined profiles and clean sightlines keep a timeless look while adding weather resistance and security.

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

Timber

Recommended Timber
For the best balance of durability, stability and aesthetics, we recommend:

Accoya

Accoya is a high-performance modified timber that offers industry-leading stability and durability. It does not shrink or swell, ensuring windows and doors operate smoothly in every season. This stability prevents paint from cracking, meaning finishes last significantly longer. It is ideal for the British weather and is guaranteed against rot for 50 years.

Red Grandis

Red Grandis is a durable hardwood known for its consistent grain and uniform appearance. It provides an excellent, smooth surface for both paint and stains, making it a popular choice for premium joinery. Sourced from sustainable plantations, it offers a high-quality, stable, and ethically sound alternative to traditional hardwoods.

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

78mm x 57mm

Cill

78mm x 68mm

Transom and mullion

78mm 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

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 stormproof windows

Form and function

Stormproof windows combine strong protection from the elements with considerable aesthetic appeal.

Weather resistance

They are engineered to withstand the harshest weather and keep your home safe and comfortable.

All-year protection

Advanced sealing systems and durable materials minimise water, wind and air infiltration through the year.

Energy efficiency

U-values from 1.2 W/m²K for double glazing, improving with triple glazing, and lower again with vacuum glass hybrid units.

Improved security

Robust construction and advanced locking mechanisms give peace of mind.

Property value

Investing in high-quality stormproof joinery adds value to a property and appeals to buyers.

Working with us

Heritage, trade and installation

Listed and heritage

Stormproof Heritage Windows

Heritage and conservation

Listed and heritage properties

We have extensive experience producing stormproof joinery for listed and heritage homes, designed to perform in harsh weather while keeping traditional style. We can:

Match period profiles and detailing

Prepare section and elevation drawings

Support planning and conservation approval

Work with contractors on exposed or coastal projects

Materials

Sustainably Sourced Timber

Materials

Sustainable materials

We manufacture our stormproof 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 stormproof 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

Cream timber stormproof windows in tiled dormers on a stone house, made by Spittlywood

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

Stormproof

Still have questions?

01233 730816

[email protected]

Heritage and planning

Do you have experience working with listed buildings?

Yes, we have extensive experience producing stormproof joinery for listed and heritage homes, designed to perform in harsh weather while retaining traditional style.

Can you provide section drawings for planning permissions?

Yes, we can prepare section and elevation drawings as part of your planning or conservation approval process.

Timber and finish

What timber do you recommend for stormproof joinery?

We recommend Accoya and Red Grandis for their strength, weather resistance and long-term dimensional stability.

Security and glazing

Are stormproof windows and doors secure and insulated?

Yes, all designs can be manufactured to PAS 24 standards and include high-performance glazing and seals for excellent energy efficiency.

What is PAS 24 and how does it benefit stormproof products?

PAS 24 is a British certification confirming your joinery has been tested for durability and resistance to forced entry.

Supply and lead times

Do you supply and fit stormproof products?

Yes. We provide both supply-only and installation services, and we often work with contractors on exposed or coastal projects.

What is the lead time for bespoke stormproof windows?

Typically 6 to 8 weeks from confirmed order and deposit.

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