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PLEASE ENSURE YOU FULLY READ THIS SECTIONAL DOOR 'MEASURING GUIDE' BEFORE PLACING AN ORDER. This is a made-to-measure door, once manufactured, cancellations or returns are not accepted.
Most sectional doors are designed to be fitted behind the reveal (face fit). However if that is not possible or you are wanting to maximise the internal space within the garage you can fit the door in between the reveal.
A sectional door will come into the garage a lot further than a standard up & over door. It’s important to have enough space along the ceiling for the door to retract back into the garage. You generally need to allow for the full height of the door plus an extra 600mm. You also need to check for obstructions to the horizontal tracks which the door will open on like a gas meter, electric box or side retaining walls. The central boom which connects to the operator is generally 3300 mm in length.
You can install a sectional Garage Door door either in-between the garage brickwork or behind the reveal.
Whether you are fitting the door behind or in-between the opening, you will still need to measure the structural opening.
Most doors come with side tension springs and require 125mm headroom above the door panels for the frame, boom and operator. The top frame is 100mm.
Fitting BEHIND the reveal brickwork (face fit):
Width - Measure the structural opening, take the width measurement in 3 places, across the top, middle and bottom, take the widest dimension. This should be your ordering width. The frame will fit behind the garage reveal. If you want part of the frame to be visible on the outside of the door simply reduce the ordering width accordingly (although this will reduce your drive-through width).
Height - Measure the height from the floor to the underside of the lintel in 3 places. Take the widest measurement. This should be your ordering height. The top frame will fit behind, you will need at least 125mm for the frame, boom and operator (for side tension spring doors). If you want part of the frame to be visible on the outside of the door simply reduce the ordering height accordingly (although this will reduce your drive-through height).
The minimum side room required for a behind-fit is 85mm behind the reveal.
Face-fit (standard behind the reveal)
Fitting IN-BETWEEN the reveal brickwork:
Width - Measure the width, take the width measurement in 3 places, across the top, middle and bottom. Make a note of the shortest measurement, this is the measurement we require. We will take off 180mm deduction to allow for the frame profile legs (90mm x2) and send you drawings to approve.
Height - Measure the height from the floor to the underside of the lintel in 3 places taking the shortest measurement. This is the measurement we require as long as you have at least 25mm of headroom above the lintel for the boom. If you have no headroom for automated doors you should deduct at least 25mm from the height. This deduction is to allow for the boom to fit above the frame and underneath the lintel. We take off 100mm to allow for the frame top and send you drawings to approve.
If you have no headroom you will need to purchase an additional UPVC trim to cover the space above the frame and the lintel where the boom is fitted. Colour matched trims can be purchased from most DIY stores.
When fitting in between you must use the correct reveal fitting brackets (supplied if in-between fit is selected).
Springs and headroom requirement
Sectional doors can have either Side Tension springs, Front Torsion springs or Rear Low Headroom torsion springs. The most popular and preferred option for installers in the UK is Side Tension springs. The type of springs you get depends on the size and type of sectional door (standard panel or panoramic).
Note: Doors with front torsion springs, including all doors over 5000mm wide require 300mm headroom