Hassle Free Cavity Formers From Dale Joinery

Discover Dale Joinery’s hassle-free cavity formers for a streamlined installation process.

Window Formers & Door Formers

Cavity formers for windows and doors are typically made from high-density foam, and they are used to create a space or cavity between the window frame and the surrounding masonry. The primary purpose of a cavity former is to use the cavity closer bar lengths (that were typically installed after the apertures were formed) to close off the cavity to form a 3 or 4 sided frame that can be installed into the external wall make up as the walls are being built.

This predetermines the sizes of the windows and doors that will be installed at a later date.

The windows and doors can then be manufactured ahead of time (whilst the external envelope of the building is still ongoing) instead of waiting to measure the existing apertures then sign off an order and wait 8-9 weeks. In theory you should be able to have the windows on site the week that you need them to help ensure the build process is on time, running smoothly, which in turn saves on cost.

Fire Rated Cavity Formers

Fire-rated cavity formers are also available, combining a 60-minute cavity fire barrier and cavity closer former in ONE product.

Contact us 0800 030 2222 or email sales@dalewindows.co.uk for further details.

How To Install Cavity Formers?

1.Check that the closer is level and square.

2.Prop the former to ensure it remains plumb, and build up the course work around the former by one course.

3.Insert a brick ties into the former, rotate by 90°and bed into mortar, on both inner and outer courses.

4.Continue to build the coursework up around the frame in the normal manner, ensuring that the frame remains plumb. Brick ties should be inserted every third outer course, and every otherinner course. (A minimum of three per vertical).

5.Build the inner and outer courses up to the lintel height. The lintel should be set 5mm over the former. Locate the lin- tel in position and bed into mortar. Allow the mortar to set before removing the props and brace.

Dale Joinery's Cavity Formers

The benefit of our cavity formers is the quick lead time from order to delivery, enabling openings to be quickly and accurately formed on-site. This then allows the scheduling of external joinery to be taken off the critical path. Windows and doors can be ordered quickly, knowing they will fit accurately into the pre-formed openings. No need to wait for the openings to be built then measured and ordered, potentially saving you weeks on site!

The standard cavity former order process is incredibly easy. Just specify the cavity size and whether it is ‘in-line’ (brick and block lining through) or ‘in-check’ (set behind the face brickwork).

Important Note

The closure frame must be periodically checked throughout the building operation to ensure it remains true and square. Any movement or twisting in the frame could result in poor window fit. We recommend using tape and spirit level to ensure the frame is correctly installed.

If you’re looking for a leading partner for your next building or construction project, Dale Joinery has got you covered with high-performing timber windows and doors that stand the test of time. We take great pride in working with homeowners, developers, architects and builders nationwide to provide you with beautifully crafted windows and doors that boast an array of benefits and features.

For further information on our range of products, download the Dale Joinery brochure or request a physical copy online. Additionally, you can view our range up close by visiting us at our showroom in the National Self-Build & Renovation Centre.