Why does my overhead (canopy) door feel rather heavy to lift and doesn’t open easily of its own accord?
Can I paint my Weatherwhite steel door?
Can I install an electric opener on my Cardale door fitted with overhead (canopy) operating gear?
Can I use an exterior grade (Yacht type) varnish to finish my Cardale timber garage door?
How often do I need to treat my Cardale Timber garage doors?
What is GRP?
What door size do I need?
Can I have my new door fitted to my existing timber frame?
Can I paint my white GRP door another colour?



Q. Why does my overhead (canopy) door feel rather heavy to lift and doesn’t open easily of its own accord?

A. The spring has either become dry / dirty and needs some lubrication or the spring needs an extra turn or two to increase the lifting power. First of all, oil the door as per the instructions in your handbook and open and close the door a few times to let the oil penetrate, then check the opening action again. Often oiling the door has the same effect as increasing the spring tension. If the door is still sluggish / heavy to operate then add a bit more tension following the instructions in the handbook / on the back of the door. It is always a good idea to lubricate the door and check the opening action on a regular basis to ensure optimum performance. Be careful when retensioning as the spring is under a great deal of tension – follow the instructions carefully, or if you have any concerns, call your local Cardale / AGDS distributor.

Q. Can I paint my Weatherwhite steel door?

A. Unfortunately it is a very difficult task to make a satisfactory job of painting a plastisol door and we do not recommend it.

Q. Can I install an electric opener on my Cardale door fitted with overhead (canopy) operating gear?

A. Most doors can, provided the door was manufactured with CD45 or CD Professional gear (introduced after 1989). The Cardale Autoglide remote control electric opener was designed specifically to automate doors with overhead gear and do it safely and without the protrusion into the opening that you get with a bow-arm type converter. We recommend that you use a professional installer to carry out this work as the safe and correct operation of the door needs to be set accurately at time of installation.

Q. Can I use an exterior grade (Yacht type) varnish to finish my Cardale timber garage door?

A. We do not recommend the use of varnish as it does not allow the timber to breathe and can store up problems. There are some excellent micro-porous stains available from your local paint supplier which will give long lasting protection to your door – if applied according to the manufacturers instructions. Always remember to coat the inside as well as the outside of the door with the same materials - if you don’t, the door has a high probability of twisting, warping or cracking and will not be covered by the manufacturers warranty.

Q. How often do I need to treat my Cardale Timber garage doors?

A. That depends on the finish already applied. Timber is a natural product and will respond differently to different environments and different surface finishes. A good quality micro-porous finish properly and adequately applied should last for approximately 2 to 3 years. The only way to be certain is to keep a close eye on the finish and if any failure of the surface covering is spotted anywhere on the door, it’s time to treat it again.

Q. What is GRP?

A. Glass Reinforced Polyester (also known as fibreglass or glassfibre) is a term used for a two component ‘plastic’ type material that is stiffened and reinforced by bonding polyester resin to a multi-stranded fibrous glass ‘mat’. The whole product cures chemically into an inert ‘mass’ that will not warp, shrink or rust and is remarkably stable. GRP has no joins, seams, rivets or welds visible on the face of the door and its gel-coat face is capable of picking up a completely faithful woodgrain pattern from the moulding process that will even leave the timber experts fooled

Q. What door size do I need?

A. All door sizes shown in Cardale literature are the actual size of the opening that the door is to go into. Sizes shown are given as opening width x height in feet & inches. Therefore a 7066 door is made to fit an opening 7ft wide by 6ft 6 inches high. Similarly a 1470 door is made to fit an opening 14ft wide by 7ft high. Cardale generally build a tolerance of approximately 19mm into the width and 25mm into the height of the door panel supplied, this leaves a gap around the edges of the panel to allow for the unhindered operation of the door gear.


Q. Can I have my new door fitted to my existing timber frame?

A. Yes, provided it is fitted firmly, is in good condition (no rot – especially at the bottom), fitted squarely in the opening and is a minimum of 70 x 70mm. If all of these conditions are met then it should be satisfactory. An alternative is to replace it with a Cardale steel frame that comes pre-fitted on single doors or as a knock-down kit on double doors, which is available with a fully-finished plastisol exterior in white or Van dyke brown.


Q. Can I paint my white GRP door another colour?

A. White gloss GRP doors can be overpainted in a different colour if required. There are proprietary primers, undercoats and finish coats available from specialist paint manufacturers for use on GRP. The easiest source of supply and advice is from yacht chandlers (see Yellow Pages). Unfortunately, as we have no control over the effectiveness of the preparation and painting, no warranty will be available on any door so treated.