A full house of windows fitted in a single day sounds optimistic until you watch it happen. This is a real window installation in Wallasey, carried out by our own team on a semi-detached home, covering the order the work is done in and why. If you want the photographs and the video from the same job, they sit on our Wallasey case study.
The short answer to the question most homeowners ask: yes, a typical semi can be completed in a day. What makes that possible is not rushing. It is the sequence.
Watch the one-day installation
We filmed this Wallasey job from the first frame coming out to the finished kerb appeal.
The order of work matters more than the speed
The team does not strip every window out of the house and then start fitting. Each opening is taken back one at a time, prepared, and the new frame goes in before anyone touches the next one.
That keeps the house secure and weathertight all day, which matters on the Wirral coast where the weather turns quickly. If you are at home while the work happens, you are never left with an open wall.
Old frames are cut and lifted out rather than levered. Levering is quicker, but it brings plaster and brickwork with it, and you pay for that afterwards in making good. Dust sheets go down before anyone picks up a tool, and debris is bagged as the job moves round the house.
Why frames are levelled before they are fixed
Each new frame is set into the opening, then packed and levelled before a single fixing goes in. Openings in older houses are rarely perfectly square, and the packing is what corrects for that.
Get it wrong and the frame is fixed in a slight twist. The sash catches on the seal, the handle needs a shove, and no amount of hardware adjustment afterwards will cure it, because the fault is in the frame rather than the mechanism. Get it right and the window closes with one hand for the next twenty-five years. It matters most on side-hung units, where the whole sash has to meet the seal evenly along its length, which is worth knowing if you are specifying uPVC casement windows.
Glass goes in once the frame is fixed and checked. That is why you can see empty frames on a house late morning and a finished job by mid-afternoon: the two stages are deliberately separate, and the second moves quickly because the first was done properly.
What A-rated glazing actually measures
The windows on this Wallasey job were A-rated, anthracite grey outside with white inside, using low-emissivity glass, warm-edge spacer bars and argon-filled cavities. Low-emissivity glass has an invisible coating that reflects heat back into the room, and a warm-edge spacer is the strip around the sealed unit that reduces heat loss at the perimeter.
The rating itself is issued by the British Fenestration Rating Council, and it covers the whole window as a unit rather than simply the number of panes. That is why two windows that look identical from the pavement can perform differently once they are in the wall. A-rated glazing can help reduce heat loss and improve comfort, though actual savings depend on the property, its existing insulation and how it is heated.
The thing homeowners mention first is rarely the warmth. It is the quiet. Sealing the draught paths around an old opening takes a good deal of outside noise with it, and the warmth tends to get noticed later, during the first proper cold snap.
Sealing is the last job, not the first
Sealing waits until the frames are fixed, the glass is in and every opener has been tested. Doing it earlier only means disturbing it later. The external seal keeps weather out and the internal seal stops warm, moist air reaching the cold side of the reveal, which is where condensation problems usually begin. This is the step that gets rushed on a poor job, and it decides whether draughts come back in two winters.
Roofline work while the team is already on site
On this job the fascias, soffits and guttering were replaced at the same visit. With the team already set up and working at height, doing the roofline alongside the windows meant one visit, one tidy-up and a finish that ties the front of the house together.
Certification arrives after the van leaves
Replacement windows are notifiable work under the Building Regulations. As a FENSA Approved Installer we register the job and the certificate comes to you directly. It confirms that the installation complies with Building Regulations, that it is registered with the local council, and that the installer warranty is insured, which FENSA sets out in its guidance on what a FENSA certificate covers.
Your solicitor will ask for it when you sell the house, so keep it somewhere you will find it again. We have gone through the detail in our guide to what FENSA approval actually means.
Window installation across Wallasey and Wirral
We are based in Wallasey and work across Wirral, Chester and Cheshire, and every survey and installation is handled by our own employed team rather than subcontractors. If you want the specifications, colours and options in one place, they are set out on our guide to double glazing in Wallasey.
Frequently asked questions
Can a whole house of windows really be fitted in one day?
On a typical semi-detached house with standard openings, yes. Larger properties, bay windows or anything needing structural work will run into a second day. That gets established at the survey rather than on the morning of the fit.
Will my house be left open to the weather?
No. Openings are done one at a time, so the property stays secure and weathertight throughout the day.
Do I need to be at home for the installation?
Someone needs to be there to give access and to check the work at the end. You do not have to be present for every hour of it if a family member or neighbour can cover part of the day.
What happens to the old frames and glass?
We take them away and dispose of them. Nothing is left in the garden or the driveway.
Do I get a certificate when the work is finished?
Yes. Replacement windows are notifiable under the Building Regulations, so we register the installation and your FENSA certificate follows. Our work also carries a ten-year insurance-backed guarantee through IWA.
Can the roofline be replaced at the same time as the windows?
Often, yes. If the fascias, soffits or guttering are due, doing them on the same visit means one set-up, one tidy-up and a consistent finish across the front of the house.
How do I get a price for my own windows?
We come out, measure up and talk you through the options before giving you an honest written price. You can request a free no-obligation quote whenever you are ready.
Thinking about upgrading your windows, doors, conservatory, roofline or garden room?
📞 0151 638 0909 | 📧 info@perfectwirral.co.uk | 🌐 www.perfectwirral.co.uk/contact
Serving Wirral, Chester & Cheshire.
