Supply & Installation

At Bereco, we don’t just make great timber windows and doors; we install them too. 

We pride ourselves on Delivering the Difference in all that we do, and our installation service is no different. This guide will take you through what you can expect from us when you choose supply and installation of your new timber windows and timber doors from Bereco.

For full details on Survey & Installation download our PDF. 

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What to expect when having your timber windows and doors installed by Bereco​

On Arrival

Our installation team will always arrive in clean company workwear and keep their vans clean both in and out. Upon arrival, they will use protective shoe covers to ensure that your floors and walkways are protected. All floors, surfaces, and furniture in active work areas will be covered and protected using the appropriate materials. Our team will request that you remove any fragile and valuable items yourself so as not to interfere with them. Before their removal, external areas around replacement items, such as gardens, flower beds & flat roofs, will be protected by heavy-duty mesh tarpaulins.

Our team will be open, friendly, and ready to answer any questions.

As a general guide the team will:

  • Introduce all members of the team
  • Review all items to be replaced with you to agree on a clear programme of works, including any special requirements
  • Agree where to park the van and any designated storage areas
  • Check whether they can use radios during the works
  • Prepare dust sheets, other protective coverings, tools, and equipment.
  • De-palletise products and prepare them for installation
  • Erect signboards if we are on site for more than one day

Before Installation

Our installation teams carry out surveys themselves, ensuring that they know exactly what is required.

When you decide to proceed with a supply and fit quotation from us, our Customer Relationship Manager will contact you to arrange a survey date and request payment for the survey. During the survey, our team will determine the best method of fixing for each item, discuss finishing touches such as trims and answer any questions you may have.

We keep you up to date throughout the production process.

Once the survey has been completed, our design team will update your quotation with the final sizes, adding any additional requirements and ensuring you are happy with every element of the specification. When you are ready, they will send a sales confirmation with a proforma invoice.

As soon as the confirmation is signed and the deposit is paid, the order will be passed to production. Our Customer Relationship Manager will contact you within the first two weeks of production to introduce themselves and provide a preliminary installation date. Two mid-production updates will follow and a final delivery and installation date will be provided a week before installation. At this point, we will request the final balance payment from you.

We will deliver your windows before installation.

In most cases, we will deliver your new windows and doors before installation on a curtain sided wagon with mechanical offloading. Doing this allows for the delivery of larger items and means all products are securely palletised to ensure that they are delivered safely. Our team will coordinate this with you to ensure that the products are delivered at a suitable time and are stored correctly if necessary. Any skips and scoffolding that our required will be delivered by 3rd party companies, which will all be co-ordinated by our team.

We will contact you the day before installation to confirm the team’s expected arrival time.

In most cases, we aim to arrive with you between 8am and 9am. If the team are running late, they will call you directly to let you know.

Book a design consultation today!

Find the perfect style for your home and budget and take out the guesswork. All you need is a computer, tablet or smartphone, some photos of the outside of your home and rough measurements of your windows (don’t worry, they don’t need to be millimetre perfect!) – our team will do the rest of the work.

Installation Process

We never remove an item without being sure the replacement will fit.

As our installation team carry out the surveys themselves, they know exactly what is required for each replacement item. Before removing an original item, they will always measure and check the replacement product and existing aperture against the survey paperwork to ensure that everything is correct. In the unlikely event that any issues arise, they will be reported immediately, and prompt action will be taken to minimise any disruption.

We use appropriate care to preserve the internal and external finish of your home.

Our team will always remind you that removing existing windows can be a dusty process. When possible, they will use polycarbonate sheeting to screen the aperture from the room. If it’s necessary to cut back plaster, they will use appropriate tools to ensure consistent lines and minimal dust. Any glass will be carefully removed and disposed of in a proper manner to ensure there are no hazards. The immediate area around a window will be vacuumed and cleaned after the removal of each frame.

We will appropriately prepare each opening before fitting the new item.

Before installing the new product, our installers will thoroughly clean and prepare each aperture, including removing old sealant lines. A damp-proof membrane will be attached to the underside of all timber windows and doors before installation.

We observe strict standards when fitting new windows and doors.

Our installers always use traditional fixing methods. Before fixing, they will ensure that every item is plumb, level, and square within the opening. They will apply fixings 150mm in from each corner and then at 450mm centres up the height of the frame. Fixings will also be provided at the head and cill if the frame width exceeds 1800mm (900mm for sash windows) or is formed by two or more coupled units. Doors with an aluminium threshold are an exception to this, as screwing through these can be unsightly and create a weak point for the pooling and ingress of water.

Fixing points.

All fixing points will first have a pilot hole drilled to ensure their precise location and minimise any chance of splitting. They will also be countersunk to allow the fixing to sit flush with the surrounding frame. We only use premium quality,
corrosion resistant fixings. After fixing, our team will apply a minimal expansion gap-filling foam to seal the frame into
the fabric of the building creating an air and watertight seal.

Cill horns.

If your existing windows have cill horns, our installation team will discuss whether you wish to maintain these at the survey
stage. If so, they will notch the cills on-site to fit them past the frame and around the brickwork, ensuring a perfect fit and
finish. They will make all cuts neatly and precisely using a chop saw, which they will then sand and fully decorate before fitting.


Our installers aim for a like-for-like finish internally, making minimal use of finishing trims.

  • When possible, they will pull the frame back tightly to the existing plaster line and finish it with a crisp line of decorator’s caulk, ready for final decorating if required.
  • For gaps of up to 20mm, they will use a non-shrinking pre-mixed lightweight filler to fill the gap neatly and evenly, ready for final decorating.
  • For any gaps over 20mm, our installers will use a traditional bond and plaster finish.

If the original items have decorative trims, we will replace them with new factory finished trims fitted to the same lines, aiming for a like-for-like finish. Our installers will pin the trims in place using a nail gun, fill the pinheads with a timber filler, fill any gaps between the trim, frames, and plaster with decorator’s caulk, and finally decorate all to match the frames. Where two trims of the same type meet, our installers will always mitre them together rather than butt joint them.

Unless specified during the survey, our installers will always fit internal window boards with a nosing and horns.
If a neat line between the window board and frame cannot be achieved, they will fit a neat pencil round trim between the cill and frame.

For any loose ironmongery, such as doorknobs and knockers, our installers will agree
on the positioning of these with you before drilling and fitting them.


Where possible, our installers will use a low modulus polysulphide-based sealant to seal the outside of your windows, which will be colour matched as closely as possible and applied in a consistent line without licking or tooling. If this is unsuitable, they will re-point around the windows and doors, using a mixture that’s carefully matched the existing mortar blend.

Any render that is damaged during installation will be re-rendered using traditional methods and materials and to an appropriate match. Our installers always use render tape to protect the products and give neat lines when pointing or rendering. An accelerator agent will be added to the sand/cement mix during the winter months.

Our installation team will maintain contact with you throughout the project, including a daily inspection and debrief of the works completed.

After Installation

Upon completion, the team will conduct a full handover, including:

  • A full demonstration of each product
  • Clear explanation of the functionality and adjustments of all locks and hinges
  • Maintenance schedules and methods discussed, and maintenance guide provided
  • Handover of door and window keys, touch up paint and other ancillaries.
  • We will leave your home in an immaculate condition
  • Our installers will treat your home as they would their own, leaving all areas in a spotless condition at the end of works.
  • They will thoroughly clean your new windows and doors to leave them in showroom condition.

Please note, our installers will take photos of every job for our company records.

Registering your warranty

We offer a 10-year manufacturers warranty on the products and a 6 year warranty on the installation. The week after your handover has been completed, our Customer Relationship Manager will contact you with instructions on how to register your warranty and will arrange a date to collect any pallets that are left behind.

Book a design consultation today!

Find the perfect style for your home and budget and take out the guesswork. All you need is a computer, tablet or smartphone, some photos of the outside of your home and rough measurements of your windows (don’t worry, they don’t need to be millimetre perfect!) – our team will do the rest of the work.

Any questions? Call us on 01709 838188

Give us a call and our friendly team will help you with anything you need.