Flush Sash Windows

Flush Sash Windows

Project Description

Flush Sash Timber Alternative Windows

With the growing trends of both heritage windows and sleek contemporary design, high-quality PVCu flush sash windows offer homeowners exclusive beautiful styling in a range of colour finishes.

Window Warehouse manufactures Halo FlushSash – a flush sash window that has the look and feel of a traditional timber Stormsash with all the energy saving, security and low maintenance benefits of a Halo PVCu window.

The flush sash window from Halo has been designed to sit flush within the frame so it’s virtually indistinguishable from timber and is ideal for heritage and conservation projects, as well as creating the contemporary feel that homeowners want in new extensions and self-build projects.

FlushSash adds the extra value that homeowners will appreciate. The option of mechanically jointed mullions and transoms make it a real and cost effective alternative to timber windows.

  • Virtually indistinguishable from timber original storm sash windows
  • Option of mechanically jointed transom and mullion for an authentic wooden window finish
  • Five chambered fully sculptured system
  • ‘A’ energy rated
  • 1.4 U-value with cost effective glass
  • Available in a wide range of colours

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Energy Efficiency

As well as a traditional style, FlushSash has a 5 chamber frame that offers modern performance. It can achieve an ‘A’ energy rating and 1.4 U-value with a cost effective glass unit. Also, that means real ongoing savings on heating bills for homeowners, an increasingly important factor for owners of period properties or houses in conservation areas.

Any changes to period properties in conservation areas must consider how it will affect the look of the building, often fitting in with the requirements of conservation officers or a Local Authority Article 4 Direction. In the past, installing PVCu double glazing has often been difficult in many conservation areas. Halo FlushSash offers a highly secure, energy efficient alternative for these period properties that requires little maintenance.

Energy Efficiency

Hardware options

In keeping with the traditional style of the window, we offer a wide range of handles, including monkey tail handles, and hinges available to compliment the period look and feel. This allows you to create a complete heritage style window installation for your customers.


Homeowners with period homes have struggled to find alternatives for windows to make their homes safe without compromising the look of their homes. Halo FlushSash offers these properties, and houses in conservation areas, a stunning choice of traditional looking windows that provide high security.

Security options from Window Warehouse

Available in a great selection of colours

Window Warehouse manufactures Halo FlushSash windows in a broad range of wood grain foil colours with fully sculptured frames. Like all of our products it’s backed by great service and practical marketing support so you can make the most of it.

Flush Sash Window Gallery

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About Us

Malcolm Cake started Window Warehouse in 1986 and over 30 years later we are still serving some of our original customers. We are one of Halo’s longest standing trade fabricators and manufacture in Portsmouth.


We test our products to BS6375 and PAS 24, meeting the latest Document Q Building Regulation requirements for new buildings.

Independent Network

Since 1996 over 230,000 homeowners have chosen a Network VEKA approved installer to fit their windows, doors or conservatory. Now developed into the Independent Network, Window Warehouse is an Approved Trade Fabricator so talk to us about our outstanding installer support.


Our team is on hand to give you all the support you need. Our experts can give you technical and installation advice and offer we professional marketing and business support with our exclusive Haven retail brand promoted across Hampshire and the South Coast.

Quality First

Our windows and doors are manufactured to ISO 9001:2008 Quality Assurance and CENSolutions CMS Mark (CMS 6023W): Factory Production Control System compliance to EN 14351-1:2006.
Halo from Window Warehouse

Halo Installer Scheme

Powerful marketing support and exclusive sales leads in your area are two advantages of the free-to-join Halo Approved Installer Scheme. As one of the longest standing Halo Trade Fabricator partners Window Warehouse.