Frequently Asked Questions on Garage Doors

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Our full list of Questions and Answers is shown below, click on the more link to see the detailed answers to some of the questions.


The Hormann Rollmatic2 has different ordering size references to nearly every other aluminium roller garage door manufactured in the UK. The Rollmatic we refer to here is the original model with an external motor drive and 110mm side guides with a spring balance system to one side.
When you order the Hormann Rollmatic2 garage door the order references are the IN-BETWEEN GUIDE WIDTH and the GUIDE HEIGHT excluding the size of the aluminium hood enclosure, which is supplied as standard to fully enclose the curtain.
The ordering reference sizes are for the actual daylight opening width and height - NOT including the side guides and roll hood enclosure.

The guides are all 110mm wide each side whatever the door size and the headroom required for the roll and hood enclosure is 290mm on doors up to 2300mm high and 335mm on all doors over 2301mm high.

Example: Installing a Rollmatic on the inside face of a structural garage opening of 2280mm wide and 2150mm high will mean an ordering size of 2280mm and 2150mm assuming of course you have sufficient headroom and sideroom for the guides and hood. The overall width will be 2500mm and the overall height will be 2440mm.
The hood enclosure for a Rollmatic2 is either 290mm or 335mm when the door is over 2300mm high (because the roll is physically bigger) so again if you have a floor to underside of lintel height of 2250 and then an internal headroom behind the lintel of 300mm you can take the total of 2250 plus the 300 which equals 2550mm and then take off the 290mm and maybe say 10mm for installation tolerance and you have left 2250mm which is the ordering height.
All Rollmatic roller doors are made to measure so there is no extra charge for this and it makes sure you get the best fit and the best drive through width and height when the door is open.
Hormann Rollmatic 2 Aluminum Roller Door


Insulated Roller Doors can be fitted externally when they have a full hood cover and appropriate manual releases.  Continuous curtain, single skin steel roller doors cannot be fitted externally and are only suitable for face fit installations.


Nearly all the aluminium double skinned electric roller garage doors we manufacture and sell are able to be installed externally. This is a common practice when the headroom inside a garage is limited or there are other obstructions inside the garage, but also to maximise the length inside your garage if your car needs every millimetre to fit inside lengthways and still close the door.
The roller door fitted outside will always require a full hood cover to protect the mechanism, curtain barrel and motor from the elements, but also to provide safety and help prevent fingers being trapped in a roller door opening upwards.

External roller doors are nearly always aluminium, insulated/foam filled models, with smaller roll sizes when open fully, enabling smaller and more discreet aluminium hood covers to be fitted. Most hood covers are about the 300mm by 300mm size, preferably with a chamfered front edge to make a softer visual aesthetic.
Please be aware that for an external installation you will always be viewing the 'inside' face of the individual aluminium slats used for the curtain, and this is the concave side and not the slightly convex side usually showing for any roller door manufactured in this way. Be aware too some finishes and colours may be only relevant on the convex side (the outside) and the inside face may be a different colour altogether. We generally ask for details of where the roller door is being installed to check on this for you.
When you install a roller garage door outside the opening care must be taken to ensure you order optional lockable cover plates for any manual override system provided, as these will be otherwise exposed to anyone outside, and also ensure you realise the electric motor side specified in the ordering process may be taken as the side looking from outside and not inside, It is usually taken from looking at the curtain roll and hood cover, regardless of where it is fitted.

The ranges of steel 'continuous' curtain non insulated roller garage doors also on the Uk market are not suitable for external installation as they have guides and bracket supports not suitable for external use as well as having a much larger size of roll to deal with no obvious way of securing a hood cover to anything around the roller curtain.
Hood covers are only sold for aluminium roller doors and are nearly always made of aluminium as well with various powder coated finishes to match or contrast the door curtain.
it is possible to use the Compact roller door which has a box size of 205mm, far smaller than most standard door hood cover and roll sizes.
The image below shows an externally fitted roller garage door with a hood.

Externally fitted roller shutter garage doors

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