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Cavity closer

Emereo can now manufacture pre-formed uPVC cavity closers to help your project run as smooth as possible.

Cavity closers have become a critical building component that’s now widely used in all commercial and residential new-build projects. They are undoubtedly the simplest and most effective way to seal cavities around wall openings and provide a rigid template for bricklaying and window or door installation.

These cavity closers provide a quick, easy and cost effective way of forming a window or door opening, acting not only as a pre-made template for building, but also as a rigid insulated DPC whilst minimising the effect of thermal bridging.

Here are a few of the major benefits at a glance:

  • Manufactured from 100% post-consumer UPVC
  • Pre-installed polystyrene core enhances thermal efficiency for Part L compliance
  • Time saving clip together assembly – no adhesives or tools required Quick-fit spring clip for fast installation of pre-glazed windows
  • Compatible with most UPVC window systems as well as timber and aluminium

Our range of innovative Cavity Closers won’t just help you meet today’s sustainable legislation, but that of the future as well. The insulated back box gives excellent thermal performance and means that openings can be closed with continuous insulation.

Suitable for uPVC, timber, aluminium and composite windows; these Closers are fabricated to order, to suit your individual requirements.

Cavity closer flyer

Our Closers are manufactured from post-consumer recycled uPVC. We offer a range of products to suit cavity widths from 50mm up to 300mm using the Cavalok Universal, BigBlok and FlameBlok systems. These are insulated cavity closer systems designed for zero-carbon building, which means it already complies with the 2016 Code for Sustainable Homes Level 6.

100% satisfaction

Dedicated to "Good Service", we value every single customer.

Affordable quality

Delivering long-lasting quality products at affordable prices.

Sustainable practice

Invested in a sustainable future, we recycle all old windows.

10 year guarantee

10 year insurance backed guarantees for peace of mind.

Fast & reliable

Enjoy your new windows & doors as soon as possible.

Industry accredited

FENSA, CORGI Fenestration & CHAS accredited installers.

Don’t just take our word for it

Nothing pleases us more than happy customers. So, here are just a few reasons why we remain the first choice for savvy homeowners, trade installers, and builders in Huddersfield and Yorkshire.

We are delighted with our new windows and doors. The lads from Emereo were punctual, polite and efficient.  The work took two days to complete and the Emereo staff left our house clean and tidy both days. We are so impressed with the blinds in our french windows. They are so neat and unobtrusive, whilst giving us the privacy we require.

We have already noticed a difference to the warmth in the house and a distinct lack of draughts that we experience with our old windows and doors.

I would not hesitate to recommend Emereo to friends and family.  Andy runs a great company with well trained staff and high standards from start to finish.  I cannot thank them enough.

Highly recommend. Efficient, excellent workmanship, clean up after themselves. No decorating required afterwards. Finished mine in a day. Brilliant job – thankyou.


Amazing job today, polite, clean and amazingly efficient.


Spot on from initial quote to install. Entire house refitted and windows look amazing. Impressed with how clean and tidy the house was after all the work the lads put in. Cannot recommend enough.


I love my new doors thank you. The lads have done a great job.

The white interior of the inner door and the choice I made for the glass with your help makes a huge difference to the light coming in. It’s really lovely thank you.

It’s also great having the same key for both doors.

Thanks for all your help Andy and I will definitely recommend you to friends and family. Very friendly and supportive – great customer service


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