Built by the trade. Refined by legal professionals.
Professional contracts for contractors carrying out window and door installation across the UK
Construction Companion provides professional window and door installation contract templates, installation agreements and Terms & Conditions for contractors, window installers, door installers and glazing businesses working across the UK.
Written from installation experience
Ours Know Your Work. Your Risks. Your Disputes.
Every Construction Companion window and door installation contract starts with real installer experience. Our contributors understand the issues that can arise around measurements, survey information, openings, existing structures, access, glazing, frames, doors, hardware, customer-supplied products, delays, variations, additional work, making good and payment stages. Those real-world issues are developed into clear, professional installation Terms & Conditions before the finished contract is finalised by our UK legal team.
Window & Door Installation Contract Protection — Ready for Your Next Job.
Simply Fill In The Blanks.
Add your business, customer and installation details and start using your ready-made window and door installation contract template straight away — without writing one from scratch.
No subscriptions No memberships No time-consuming software
We know what can go wrong during a window or door installation. Incorrect measurements, unsuitable existing openings, hidden defects, access problems, damaged finishes, glazing or hardware issues, delays, variations and disagreements over making good can quickly turn a straightforward job into lost time and lost money.
Our window and door installation contract is designed for installers who want responsibilities, customer expectations, additional work and payment terms made clear before the job begins — not after a problem has already started.
Our contracts do not gather dust in the van. They are a smart business investment you will use again and again, becoming part of your routine to protect your livelihood and your business.
The leading contract store for tradespeople. Professional construction contract templates without subscriptions, memberships or complicated platforms — built from firsthand trade experience and finalised by our UK legal team.
Our contract templates are built from firsthand experience in the trades they’re made for. We know where misunderstandings happen, what customers commonly question and which responsibilities need to be made clear — because we’ve dealt with them ourselves.
Construction Companion brings together firsthand trade experience and professional UK legal knowledge to create construction contract templates, agreements and Terms & Conditions designed for the work tradespeople actually carry out. We've been doing it since 2008.
Our tradespeople want stronger payment terms, clearer responsibilities, fewer loopholes and better protection when problems arise on a real construction job.
Our legal team has another responsibility: making sure the contractual wording remains fair, enforceable and compliant with the legislation relevant to the agreement.
It isn't unusual for the two sides to challenge each other. The trade side pushes for practical protection. The legal side tests the wording, balance and legal position.
Only once both sides are satisfied does a document become part of the Construction Companion collection.
That's deliberate. A good construction contract has to work legally, but it also has to work when it's actually handed to a customer.
Does this cover what really happens on site? What if the customer changes the work? What if hidden defects are uncovered? What happens when another contractor causes a delay? Are payment stages clear? Are the customer's responsibilities actually written down?
Is the clause fair? Is the wording clear? Does consumer legislation need to be considered? Are cancellation rights relevant? Could the provision create an unfair imbalance? Does the agreement properly explain what each side is expected to do?
Trade-written, solicitor-adjusted. Polite terms to send with your quote. Sets expectations early and keeps things professional.
We strongly advise using Quote Terms with every single job. Without them, there are no rules, no protection.
Send this with your invoice to confirm the terms already agreed — including late fees — all backed by UK consumer law.
This simple step — when used alongside our contract or Quote Terms —leads to invoices being paid on time.
Your download begins immediately after checkout.
You’ll see access on-screen right away, and we also send the download links to your email.
you won’t find subscriptions, recurring fees, or hidden charges.
Just a one-time payment, with unlimited access for 2 years .
We’ve helped tradespeople across the UK protect their work and their payments. Here’s just a small sample of their feedback.
"Been in this game 40 years now. If something helps get the job done and the money in the bank, I’m using it. Nice terms 👍"
"Quick download, very thorough Terms and Conditions, saved us lots of time and money."
"Wanted this to upgrade my quote terms. The Terms and Conditions are brilliant 👍"
"Good, easy, and not a nightmare to edit or understand. Costs more than a generic one, but you can see the work that’s gone into it. Covers most of the common arguments I’ve had with customers as a finishing trade. Couldn’t have written it better myself."
"Well put together. Every job has terms in place upfront before it starts now, even the small jobs. Not risking it for my business or my family’s livelihood. Run a business, not a charity."
"We use this for all client contracts now. Keeps everything above board."
Construction Companion combines decades of real construction experience, trade-written knowledge and professional legal input to create construction contract templates built specifically for UK tradespeople and construction businesses.
Our documents are shaped by experienced construction industry contributors, adjusted by solicitors and built around real jobs, real disputes, payment protection, customer responsibilities and full UK legal compliance. From roofing and building contracts to plumbing, electrical, decorating, landscaping, solar, bathroom installation and subcontractor agreements, every template is made to be practical on site, professional with customers and strong enough to protect the business behind the work.
Decades of experience are built into every document we create.
From the dream customer who pays on time and lets you get on with the job, to the ones we all dread , the ones who expect free extras that weren’t in the quote, ignore invoices, or think your price should depend on how long you’re on-site.
All our documents have you covered.
" Written by trades, for trades, with real-world challenges in mind "
When you choose this investment for your business, we don’t keep you waiting. Whether it’s for a job today or tomorrow, all documents are available instantly, easy to customize, and ready to use. Just fill in the blanks.
" Less Time at the Laptop, More Time Doing What Matters "
"One of the most important aspects of an agreement is ensuring you get paid on time."
Our documents do exactly that. Spend less time chasing invoices or awkwardly sending payment reminders, and more time focusing on your trade.
With clear terms, you decide when you get paid, whether it’s upon completion, within 7 days, or 30 days later.
Our agreements are fully customisable to suit your business.
"An agreement with solid terms puts a stop to invoice ignorance."
Your customers deserve more than a cheap, generic template that has no relevance to your trade.
You wouldn’t give your customers unreliable materials, so don’t give them a low-quality agreement.
Join the countless trades across the country who look professional with documentation that reflects the quality of their work and their approach to business management.
" provide your customers with a professional agreement they’ll respect "
As you’ve probably told your own customers — do it once, do it right. Our documents are no different.
There’s a reason trades come here instead of digging through generic templates or marketplace downloads. They want documents they’re actually proud to hand over — professional terms you can send to your customers with confidence. Paperwork that reflects the same standard as your workmanship.
Use what other trades across the UK are already using. Once you do, you’ll never go back to a generic agreement again. That’s our promise.
£19.99
✅ Instant download. No subscriptions. Use it straight away.
✅ Includes unlimited downloads and 18 months of updates.
