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Homeowner Advice

General tips and advice for homeowners covering maintenance, seasonal tips and everyday property care.

Homeowner Advice

Garage Doors: Measuring Up

If you are looking to build a garage, install a new door or replace an existing door, it can help to do your research first. The cost of your garage door, as well as the type of door that you choose, will depend on your needs, the size of your garage, your budget and, of course, your own personal preference.

If you are looking to build a garage, install a new door or replace an existing door, it can help to do your research first. The cost of your garage door, as well as the type of door that you choose, will depend on your needs, the size of your garage, your budget and, of course, your own personal preference.

You may have a good idea of what you want in terms of aesthetics, but before you start looking, it can help to measure up. Garage doors need to be fixed to a subframe, so that needs to be considered when measuring for a new door. What’s more, different manufacturers use different measurements, so it's a good idea to get advice from a garage door specialist before you take the plunge and buy your door.

Measuring for an up and over garage door

Up and over doors are usually fixed to a timber or steel box frame. If you are calling your garage door specialist in the first instance it can help them to know the size you are looking for, so they can give you a more accurate quote. Open the garage door and measure the gap between the subframe. Alternatively, you can just measure your existing door. If it is a standard size, your supplier will be able to tell you which type of door you need and quote for it immediately. If the size is non-standard, you may need a custom door, which may be more expensive.

Measuring a sectional garage door

Sectional garage doors require a bigger frame, therefore need more space. However, unlike up and over doors, sectional doors don’t fit precisely into the opening, sitting behind it instead. This means that the sizing doesn’t need to be exact. As a rule, sectional doors need 90mm on each internal side and 100-210 mm headroom on top of the opening to allow for installation and full function, so before you consider a sectional door, make sure you have that space.

Measuring for roller shutter doors

Standard roller shutter doors require an additional headspace of 300-450 mm to accommodate the rolled-up door, although compact variants are available. Fitted either in the opening or behind it, roller shutters can fit exactly or be marginally too big, provided the internal space is available.

Side hinged doors

Like up and over doors, the internal subframe is the measurement that matters for side hinged doors, and it is important to get it right. There is some space for manoeuvre as the hinges are designed to offer flexibility; additionally, you can locate the doors in front of the opening if space is at a premium. Measure from wall to wall, ceiling to floor of the opening, as well as the subframe.

Once you have your measurements, it will be easy to call your local garage door specialist and gain advice on the type of door that you need, and how much it may cost. Did you find this useful? Follow Trust A Trader on Facebook or Twitter.

Looking for more homeowner advice advice?

Find clear, practical answers to common homeowner advice questions, helping homeowners understand everyday issues, know what checks they can carry out safely, and when it is best to contact a qualified professional.

  • What home repairs should I never attempt myself?

    Gas work - full stop. Any work on gas appliances must be done by a Gas Safe registered engineer by law. Structural changes like removing walls, altering roof timbers, or touching anything load-bearing need professional assessment and often Building Regulations sign-off. Electrical work involving the consumer unit or new circuits must meet Part P. And if your property was built before 2000, be aware asbestos may be present - it can only be handled by a licensed specialist.

  • Which home improvements add the most value to a property?

    Improvements that add usable space or modernise the rooms buyers scrutinise most tend to deliver the strongest returns. Loft conversions consistently top the list - adding a bedroom and bathroom can add more value than the work costs in many areas. Kitchen and bathroom updates are next. Open-plan ground-floor extensions connecting to a kitchen-diner have become one of the most sought-after layouts in UK family homes. And energy improvements - insulation, a new boiler, solar panels - are increasingly influencing buyer decisions as running costs become a bigger part of the conversation.

  • Should I renovate my home or move house?

    There's no universal right answer - it depends on your situation. Moving gets you what you want without living through a building site, but stamp duty, estate agent fees, and moving costs can easily add up to tens of thousands of pounds. Renovating lets you stay put and invest in your own property, but comes with disruption and unexpected costs. The most useful comparison: get a clear view of what your home could realistically be worth after the work, and what a move would actually cost end to end. A local estate agent and a builder's quote can give you those two numbers.

  • What does a home survey actually cover and do I need one when buying?

    A survey is an independent assessment of a property's condition carried out by a qualified surveyor - separate from the mortgage valuation, which only tells the lender what the property is worth, not what's wrong with it. A HomeBuyer Report flags visible defects and anything that needs further investigation. A Full Building Survey goes deeper and is worth the extra cost on older, larger, or unusual properties. Given that a house is likely the biggest purchase you'll ever make, skipping the survey to save a few hundred pounds is a false economy - a single missed issue can cost far more to put right.

  • What should I do before starting any major home improvement project?

    Get your paperwork in order before anyone picks up a tool. Check whether you need planning permission or Building Regulations approval. Find out whether a Party Wall Agreement applies. Confirm your home insurance covers you during the works. Get at least three written quotes and make sure the scope of work is clearly agreed in writing with whoever you hire. And have a contingency budget - on almost any renovation, something unexpected comes up. The projects that go smoothly are usually the ones that were properly planned before they started.

  • What is the difference between freehold and leasehold and why does it matter for home improvements?

    If you own the freehold, you own the property and the land it sits on outright - you can generally do what you like subject to planning rules. If you own a leasehold property (common with flats), you own the right to live there for the remaining lease term, but the freeholder owns the building. This matters for home improvements because many leases require you to get the freeholder's written permission before making alterations - sometimes even internal ones. Always check your lease before starting any work, as doing alterations without the required consent can cause problems when you come to sell.

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