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Also see our European Hinge FAQ and our Screw Information page.



Q. What type of hinges would I normally use for hanging doors around my home?

A. The most common type of hinge used on hanging doors is the butt hinge. Butt hinges are available in many different materials and finishes. They also come in a variety of sizes depending upon their application.


Q. What size hinges should I use to hang my door?

A. This primarily depends upon the weight and size of the door you are hanging. Doors used for public buildings are generally larger and require a set of 3 stronger hinges (one hinge located in the centre of door) to hold the extra weight. Doors around your home are usually wooden and hollow and will only require a pair of hinges. Below is a table that will help you pick the right sized hinge for your door.

Door Type

Approximate Door Size

Approximate Door Weight

Max. Yearly Operations

Hinge Class (3 hinges)

Light Wardrobe


3-10 KG



Heavy Wardrobe


10-17.7 KG



Medium Internal Doors


17.5-25 KG



Heavy Internal Doors


25-37.5 KG



Half Hour Fire Doors


25-37.5 KG



One Hour Fire Doors


37.5-72.5 KG



Light External Doors


20-37.5 KG



Heavy External Doors


37.5-55 KG



Oversize Special External Doors


55-110 KG




Q. How am I supposed to measure each different hinge type?

A. Listed below are the most common hinge types. The arrows on each hinge indicate the proper way to measure.


tee hinge
bands and gudgeons


how to measure parliament hinge
projection hinge measure
butt hinge measure


Butt Hinge-Projection Hinge-Parliament Hinge- Tee Hinge- Bands and Gudgeons


Q. Any hints on mortising and mounting door hinges?

A. The leaf or flap with the most joints(knuckles) is the side that you should afix to your door frame. The cut-outs should be equal in depth, square and plumb, ensuring that the pins will be accurately aligned. Timber movement and shrinkage could mean that the hinges need to be re-aligned at a later date. The correct gauge and type of screw must be used and the cut-outs should be carefully made to provide clearance for the door to open.


Q. What type and size of screws should I use when installing my hinge?

A. First off, one should always use screws that match the material of their hinge. For example, brass screws with brass hinges. If you do not do this, the two different metals coming into contact with each other will cause corrosion. Countersunk screws should be used when fitting your hinges. After the hinge is fully tightened, the head of the screw should be flush or flat against the face of the hinge. Popular sizes for fitting butt hinges are 1 ¼ long for a gauge 10 screw for 4” hinges and 1 1/4” long by gauge 8 for 3” hinges. Note that it is beneficial to drill small hole into the wood before fitting screws to prevent splitting the wood. (For information regarding screws refer to our screw information page)


Q. I need my door to open 180 degrees, what hinges should be used?

A. When a door is required to open up 180 degrees it usually needs to clear a projection around the door frame. In this situation you would use either “parliament” or “projection” hinges (difference explained below). The screw holes on these hinges are lined towards the edge of the hinge flap therefore, after fitting the knuckle projects beyond the edge of the door. The further the projection, the greater the angle of opening.


Q. What is the difference between projection and parliament hinges?

A. The knuckle size is the difference between these two hinges. Projection hinges are usually square in shape, i.e. 5”x5”. Thus, when fitted you would have a 5” length of knuckle projection from your door. In parliament hinges knuckle size is smaller and therefore a lot less unsightly. The only drawback in using parliament hinges over projection hinges is the strength reduction. This is caused by the smaller knuckle. Ensure that you use the correct size hinge for your door weight.


Q. What type and size hinges should I use when hanging my garden door/gate?

A. Garden doors/gates are typically hung using either “bands & gudgeons” hinges or “tee” hinges. Both of these have a long strap fixed across the face of the gate. Finishes on these hinges are normally galvanized to protect them against different weather conditions. Since gates are usually higher and wider than ordinary doors, the strap fitted to the surface helps facilitate the extra weight. The size of hinge you should use depends on the width of the gate. Here is a general guide.

1. For light domestic wooden doors/gates with infrequent use the band width should be 33.3% of the door width.

2. For medium weight wooden doors/gates with frequent commercial use the band width should be 50% of the door width.

Abnormally large or heavy wooden doors/gates should be fitted with technical advice. Any wooden door/gate over two meters high but under three meters high must always be fitted with three hinges.


Q. What factors should I consider when choosing door hinges?

A. As well as door weight, height and thickness, there are many other factors that need to be taken into consideration.

1. The material of your hinges: Does finish match the rest of the furniture on your door?

2. Fire resisting requirement: Some washered hinges (with washers between the knuckle joints) are made using nylon washers. Nylon’s melting point is low, so these would not be suitable for fire doors. Also, some hinge materials such as aluminum have low melting points. If hinges are being used on fire doors, you must check if they have a fire certificate.

3. Corrosion resisting: Zinc plating or electro brass plating are for internal use only and unsuitable for moisture. Hot Spelter Galvanised or Sheradized finishes are the only finishes recommended for exterior use. Alternatively solid brass or stainless steel hinges may be appropriate for moisture areas.

4. Angle of opening: Will you need projection or parliament hinges for your door to open 180 degrees?

5. Handing: Some hinges are handed in one direction. You need to know whether you need left or right handed hinges.

6. Are door closers fitted to the door? If so, you need to increase the weight of your door by 20% when selecting hinges. If the door has a back check action you need to double the doors weight. This ensures the hinges are strong enough to overcome the extra pressure exerted on them by the resistance of the closer.

7. Finally, you need to consider quality and price. And D. Lawless Hardware has the guaranteed lowest prices and best quality!

Check them out at www.dlawlesshardware.com