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Flat roof repairs

Flat roof repairs Wellington

Crown Roofing carry out Flat roof repairs throughout the greater Wellington region.  Flat roofs require a little more maintenance than pitched roofing. Because of the pitch, the roofs do not drain as quickly so the surface is subjected to moisture for greater periods of time. The best way to extend the life of your flat roofing is to check it regularly. If you catch them soon enough, small cracks and holes can be patched before any damage is done to the substructure. We can extend the life of your old flat roof or build you a new one if necessary. Click here for costs.


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 Call Crown Roofing for all your Flat roofing repairs.

04 803 34 79

Why your Butynol flat roof may be leaking.

Butynol flat roofing membrane has an economic life of about 30 years, depending on its exposure to the weather. If your flat roof is leaking before this time, there are two main causes.
Older flat roof decks used to be secured to the building structure with ordinary nails. Over time, the nails can work free from the plywood and puncture the butanol rubber covering. The repair is simple. The old nails are driven home and a patch of new butanol is secured over the top. Modern flat roof structures are secured with screws, which prevents this problem.
The second biggest cause of butynol roof leaks are, failed lap joints. Butynol is laid across the roof surface in sheet form. The sheets are then joined together to provide a watertight seal. If the roof experiences excessive movement or uv exposure, the laps may fail, allowing water to seep into the living space. To fix this problem, the lap is first cleaned with solvent. A new butynol seal is then secured in place. 

More about Butanol rubber flat roofing. (New Zealand trade name Butynol) 

 Butynol is a synthetic rubber membrane that adheres securely to the flat roof surface. Due to its high UV resistance and flexibility it is the ideal flat roofing surface for Wellington conditions. If you are looking for a durable flat roofing membrane, look no further than Butynol. Click here for more flat roofing information. 

Butynol Flat Roofing is also able to withstand extreme temperatures and is resistant to fire. Rubber flat roofs are energy efficient because they keep the home warm in winter and cooler in the summer. Before the installation begins, the substrate must be swept off and free of any debris or damage. The EPDM (ethylene propylene diene monomer) single-ply rubber roofing membrane has been an appealing choice of the low-slope commercial roofing industry. EPDM rubber share a chemical structure that gives them an extra ordinary resistance to Heat, Cold, Sunlight and air pollution, ideal properties for a flat roofing membrane.

Since it is fully UV stable, it can be used for fully exposed applications. The main features of Butynol flat roofing are; long durability, easy to install, highly flexible and resistance to ozone. Durability, design versatility and installation ease are among the many reasons EPDM is the most popular material for both new and re-roof low-slope roofing applications.

Flat roofs are a popular style for many buildings, whether business or for the home.  A flat roof can be strengthened either by reducing the span of purlins that support it, or by adding beams to reinforce the structure. This can prevent "ponding" and water retention on the roofs surface. When you invest in a large building, maintaining the exterior features of a building need a lot of careful thought.
 Butanol flat roofing provides a durable attractive finish perfect for Wellington roofing conditions

Alternatives to Butynol flat roof coverings.

Old Flat Roofs were built with layers of tar or bitumen over a fibrous sheet that would reinforce the roofing. This type of flat roof covering is often referred to as mopped on or built up roofing. The roofers would lay out the membrane and pour molten bitumen on top before mopping the surface to ensure an even distribution. Many layers of felt and tar were needed to provide a waterproof surface. The covering would often fail in harsh climates.  

Torch on flat roofing is an adaptation of this method. However the bitumen is already applied to the roof felt before application. The roll of roofing material is rolled out onto the flat roof. A gas torch heats the bitumen as the roll is laid across the roof resulting in a firm adhesion to the flat roof surface. One or two layers are all that is required to make the flat roof impermeable. The covering of the top layer of flat roofing felt is covered in granules which prolong the life of the felt.

It is possible to use lead or copper to provide a surface for your flat roof. In these cases the substructure must be of sufficient strength to provide adequate support. Wooden rolls provide gravity seals so smaller lead sheet sizes can be used. Theses flat roofs although expensive are extremely reliable. A well fitted flat roof will last a lifetime.

Normal flat roofs are sensitive to foot traffic. Soft shoes are required while maintenance is being carried out. Walking on a flat roof can damage the roof membrane causing cracks and roof leaks. If the flat roof is to be used as a deck or living area, Butynol, provide a rubber membrane that is strong enough to walk on, so it may be used as a deck covering. Butynol flat roof material can be tiled over to provide a more attractive surface.

Butynol staining.

As with all rubber roofing products, butynol roofing should be sealed at the construction stage. This prevents staining to exterior walls. It also prevents harmfull "run off" into the environement. Once the butynol has been laid, a watertight sealer is applied over the top. Mild stains may be removed with detergent or solvent.