• triple-glazed window frame section with glass and metal components on a white background
  • triple-glazed window frame with a reflective glass panel on a white background
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Inward Opening Timber Framed Door (S309T)

Inward Opening Timber Framed Door (S309T)

FRAME
A triple-glazed timber-framed door with optional Aluminium cladding.

Based on the same frame model as the P31, the S309T door has the same profile and performance as the S307 model in an inward opening configuration. It is available as a single entrance door or double doors, with or without sidelights, and has a frame depth of 120mm.

Typical U-values are approximately 0.76 w/m²K. This door is suitable for use in Passive Houses.

This door is available with a Juliet Balcony.

  • Thermal Performance: U-Value 0.76
  • Sound Performance: 33db
  • Security Performance: PAS 24 Certified

Technical Information

Opening types Inward Opening
Frame depth 120 mm
Whole window U-value 0.76 W/m²K
Glass U-value 0.53 W/m²K
Glass package 48 mm triple glazed, two panes Low-E, argon filled
Sound insulation 33 db
Air permeability Class 4 (EN 12207:2000)
Watertightness Class 7A (EN 12208:2001)
Wind load NPD
Timber Colours RAL
Aluminium Colours RAL, IGP textured

Data Sheet

S309T.pdf

Drawing

S309T.dwg

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What type of doors are you looking for?

Take our short survey to see how we can help you choose the right doors for your project.

See the S309T in action

At Norrsken, we’re fortunate enough to work on some breath-taking projects.

From barn conversions to innovative new builds, dream homes that take half a decade and an armada of professionals to budget-focused living space renovations and self builds – we’ve seen it all.  

Our windows and doors add beauty and value to homes up and down the country. We work with clients on a vast array of styles, designs, colours, and purposes. That is something we’re quite proud of.  

GALLERY

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Create Something Distinct

Every Norrsken order is unique. Beyond custom dimensions and precision manufacturing, we provide the design flexibility to perfectly express your vision.

From custom shapes and specialized hardware to powder-coated trims and distinct hardware - find the finishes you need, whatever your project specification.

OPTIONS

Colours & Finishes

Complete design freedom to perfectly match your architectural vision.

Choose from solid colours or natural finishes with dual-colour options available on virtually every product – select one colour externally and another internally using any RAL specification.

Handles & Hardware

Our curated hardware selection combines exceptional functionality with aesthetic flexibility.

While some components are product-specific for optimal performance, we offer extensive customization across styles, colors, and finishes.

Glass Options

Advanced glazing solutions engineered for optimal comfort and performance.

Our comprehensive glass selection provides complete flexibility including double and triple glazing, solar control, and obscure options. Glass delivers the highest insulation performance in any window - with proper specification, you can maximize beneficial solar gain while preventing overheating.

Modern building with triple-glazed window, a balcony overlooking a cloudy sky and water.

Marine Finish

Marine-grade finishing for projects within 1,500 meters of the sea, ensuring exceptional durability in challenging coastal environments.
Close-up of a building exterior with wooden slat wall and triple-glazed window.

Sills & Trims

Bespoke sills and precision trims for unique architectural features. Specialized solutions including steel beam coverings and complex junction details.

Opening Types

Our main door types are: entrance doors (including French doors) , sliding doors, and bi-folding doors.

Experience the difference that thoughtful design and uncompromising quality can make - choose Norrsken entrance doors and help your home reach its full potential.

SLIDING

BI-FOLD

FRONT

FRENCH

SLIDING

Large glazed panels glide effortlessly on precision tracks, creating seamless indoor-outdoor connections without requiring external clearance space.

Perfect for patios, gardens, and terraces where space is at a premium, our sliding doors operate at the touch of a finger. Multi-point locking and advanced weathersealing ensure security and thermal performance while your interiors are flooded with natural light.

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BI-FOLD

Multiple panels fold concertina-style to create expansive openings, transforming entire walls into open-air connections with your outdoor spaces.

When you want to completely open up a room to the outdoors, bi-fold doors deliver unmatched flexibility. Available as inward or outward opening systems, panels fold neatly to one or both sides, creating openings limited only by structural considerations.

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FRONT

Make a lasting first impression with entrance doors that combine security, thermal performance, and stunning design to welcome guests in style.

Available as solid panels or part-glazed to flood entrance halls with natural light, our entrance doors set the tone for your entire home. Advanced locking systems, weather sealing, and thermal breaks ensure performance matches the impressive aesthetics.

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FRENCH

Classic French doors bring timeless elegance with twin opening panels, creating graceful transitions to gardens, patios, and outdoor living spaces.

The epitome of classic style, French doors feature two panels that open outward or inward to create elegant outdoor access. As fully-glazed entrance doors, they're also available as single doors for smaller openings, providing flexible access and natural light.

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Designed to deliver

From materials to management, every detail matters to us.
Creating homes that are warmer, quieter more efficient for decades to come.
Front elevation view of double-glazed features in a coastline renovation.

Passive House Standards

Engineered to meet or exceed Passive House benchmarks. Norrsken products support low-energy builds without compromising design.

Superior Thermal Efficiency

Exceptional insulation performance that transforms how your home feels, delivering year-round comfort while dramatically reducing energy consumption.

Full Range of Finishes

Design freedom to match your architectural style. Comprehensive color and finish options bring your exact vision to life.

Full Range of Materials

Premium timber and alu-clad options engineered for decades of performance and the aesthetic character your project demands.

Planning & Support

Expert guidance from concept to completion that transforms complex projects into seamless reality without compromise.

On-Site Project Management

We oversee every detail from delivery to final handover, ensuring seamless installation coordination that protects your timescales. 

Unmistakably trusted.

The highest compliment is a recommendation. These are the voices of those who placed their trust in us.

"Excellent Company from start to finish… If only every window supplier operated like this! I have used many others over the years on various projects but Norrsken far exceeded all of them… I hope this helps you make a decision for what is probably a large chunk of your budget… They are totally worth it"

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Angela Smith

Self Builder

“Having used Norrsken in the past we were happy to recommend them to one of our clients who was looking for the best sound proofing and weatherproofing they could get being set on a hill top overlooking the sea and facing strong westerly winds. They were not disappointed. A quality product, delivered well and on time. Thankyou.”

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Ken Pearson

Homeowner

"Fantastic professional service, from the original design to the final installation. The triple-glazed windows and doors that have been fitted to our new house are of a very high quality and look amazing. We definitely made the right choice when we decided to use Norrsken, nothing is too much trouble for them."

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Nigel

Homeowner

"I did my research before contacting Norrsken but they had come highly recommended by our Architect for our Passive House self build.

From the first meeting with Nick we felt confident that they were the Company for us."

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Ali and Brian Manning

Passive House Self Builders

“The quality of the triple glazed, alu-clad windows and doors is superb. They feel so reassuringly solid ... I opted for a wood stain for the internal finish on the frames, and am so glad I did, as it shows off the beauty of the wood perfectly. The whole process from order to installation went smoothly. I thoroughly recommend Norrsken.”

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Gareth

Homeowner

"Norrsken provided attentive service from drawings to on-site installation for our project at National Trust Stourhead and we would definitely recommend and repeat commission them on future projects."

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Charlotte Hill-Baldwin

Architect, H-B Designs

“From our very first interaction to the aftercare support, Norrsken has been exceptional. The quality of their windows is outstanding - beautifully designed, expertly crafted, and a real standout feature in our home. They've truly elevated the overall look and feel of the house.”

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Neil Southwell

Self Builder Homeowner

“I can highly recommend Norrsken… After much research I found that Norrsken could beat all of the quotes for a high quality triple glazed option. The windows are beautifully crafted and have received lots of positive comments….  I found the whole team at Norrsken incredibly friendly and helpful…”

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Douglas Munro

Selfbuilder

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