Flat Roofs and Decks    
         
    Low Pitch Roof    
    Flat Roof - Terraces - Decks - Balconies - Gutters - Canopies    
         
   

Take care of your roof and your roof will take care of your property

A traditional flat roof just isn't built to last, unlike our range of outstanding flat roofs. Our flat roofs are fitted with guarantees of either 15, 20 or 25 years, which are insurance-backed for total peace of mind, and have life expectancies of up to 50+ years.

We are manufacturer-approved installers of a number of leading systems, from modified bitumen, thermoplastic membranes to reinforced liquid coatings, and we provide a first class service throughout New Zealand.

Below are some of the systems that we approve and use on new roofs and roof refurbishments:

   
         
    Double Layer Torch-on Bitumen Membrane System    
         
       
   
* Our applicators carefully seal around penetrations, vents, skylights, dormer windows and chimneys to ensure a leak-free roof.

What is Torch On Roofing?

Torch On Roofing generally consists of two plies of Modified Bitumen Membrane. Each ply, or layer, is approximately 3 - 4 mm thick.

The base ply is either mechanically secured (with screws through large washers referred to as ''plates'') or attached to the substrate by applied heat.

The cap sheet is similar in composition, but often has a granulated surface to provide protection from the elements.

Both the top surface of the base sheet and the bottom face of the cap sheet have a thermo-fusible plastic surface (meaning they can be joined together - or fused - thermally, in this case by melting both surfaces with a propane torch), thus the term ''Torch on Roofing''.

** The information on this page is a brief introduction to the Bitumen Membrane System. For more information, specs and data sheets, please visit the supplier website or email us with your enquiry.

New Zealand bitumen membrane suppliers: Nuralite, Equus, WPS, Sealco, Jaydex, Allnex, Viking, Ardex, Allco and Hitchins.

   
         
    Single Layer TPO, TPE and PVC Membrane System    
         
       
   
* Our applicators carefully seal around penetrations, vents, skylights, dormer windows and chimneys to ensure a leak-free roof.

** The information on this page is a brief introduction to the TPO, TPE and PVC Membrane System. For more information, specs and data sheets, please visit the supplier website or email us with your enquiry.

New Zealand TPO, TPE and PVC Membrane System suppliers: Nuralite, WPS, Viking, Ardex, Sealco, Allco, Mapei and Sika.
   
   
   
         
    Single Layer Butyl and EPDM Rubber Membrane System    
         
       
   
* Our applicators carefully seal around penetrations, vents, skylights, dormer windows and chimneys to ensure a leak-free roof.

** The information on this page is a brief introduction to the Butyl and EPDM Rubber Membrane System. For more information, specs and data sheets, please visit the supplier website or email us with your enquiry.

New Zealand Butyl and EPDM Rubber Membrane System suppliers: Sealco, WPS, Viking, Rubco and Ardex.
   
   
   
         
    Liquid Applied Membrane System    
         
       
   
* Our applicators carefully seal around penetrations, vents, skylights, dormer windows and chimneys to ensure a leak-free roof.  

** The information on this page is a brief introduction to the Liquid Applied Membrane System. For more information, specs and data sheets, please visit the supplier website or email us with your enquiry.

New Zealand Liquid Applied Membrane System suppliers: Mapei, Sealco, Nuralite, Equus, WPS, Allnex, Ardex, Hitchins, Sika, Viking, Concrete Plus, Fosroc, ABEP and Parchem.
   
   
   
         
    Warm Roof insulation System    
    Flat Roof - Terraces - Decks - Balconies - Gutters - Canopies    
         
   

H2OFF has a number of warm flat roof insulations suitable for different waterproofing systems and scenarios, whether concrete, timber or profiled metal.

Warm roofs are increasingly popular today as we aim to maximize our living space and the available accommodation in any construction. This will be the predominant form of pitched roofing construction in New Zealand.

In addition, a warm roof contributes to increased air tightness, reducing heat loss caused by uncontrolled air movement.

   
         
    Warm Roof insulation System    
         
       
         
    How does a Warm Roof work?    
         
   

By moving the insulation to the outside of the structure, the roof is effectively brought inside, which results in a warm roof. This eliminates the possibility of condensation forming on the underside of the roof and eliminates dampness. Because this design works by conserving heat, no ventilation is required.

H2OFF can quickly and economically convert any cold flat roof to a warm roof, particularly where problems have been tackled. Where the existing roof is in satisfactory condition and of a suitable material (e.g. plywood), the insulation is fixed directly on top. The whole build-up should then be waterproofed with a high performance roof membrane system. This ensures that your investment in energy efficiency is protected and will continue to pay dividends long into the future, repaying itself many times over.

 
Warm Roof vs Cold Roof?

A properly specified warm-deck flat roof will deliver vastly improved energy efficiency over the traditional cold-deck design, whilst eliminating the risk of condensation by moving the dew point to the outside of the structure. The initial investment is quickly offset by reduced heating and cooling costs and the resultant increase in occupier comfort.

* Our applicators carefully seal around penetrations, vents, skylights, dormer windows and chimneys to ensure a leak-free roof.

** The information on this page is a brief introduction to the Warm Roof Insulation System. For more information, specs and data sheets, please visit the supplier website or email us with your enquiry.
 
New Zealand Warm Roof insulation System suppliers: Nuralite, Equus,
Sealco, WPS, Allnex, Viking and Ardex.

   
   
   
         
    Green Roof / Living Roof Systems    
    Flat Roof  - Terraces - Decks - Balconies - Gutters - Canopies    
         
       
         
   
Intensive Green Roof:
   
         
       
   
Intensive Green Roofs are composed of relatively deep substrates and can therefore support a wide range of plant types including trees and shrubs as well as perennials, grasses and annuals. As a result, they are generally heavy and require specific support from the building. Intensive green roofs (what most people think of as roof gardens) have in the past been rather traditional in their design, simply reproducing landscapes found on the ground, such as lawns, flower beds and water features. However, more contemporary intensive green roofs can be visually and environmentally exciting, integrating water management systems that process waste water from the building as well as storing surplus rainwater in constructed wetlands. Because of their larger plant material and horticultural diversity, intensive green roofs can require a substantial input of resources - the usual pruning, clipping, watering and weeding as well as irrigation and fertilization.
   
         
    Simple Intensive Green Roof:    
         
       
   

Simple Intensive Green Roofs are composed of lightweight layers of free-draining material that support low-growing, hardy, drought-tolerant vegetation. These simple intensive green roofs have great potential for wide application because, being lightweight, they require little or no additional structural support from the building. Furthermore, because the vegetation is adapted to the extreme roof top environment,  simple intensive green roofs require little in the way of maintenance and resource input. Simple intensive green roofs can be designed into new buildings or ''retro-fitted'' onto existing buildings.

   
         
    Extensive Green Roof:    
         
       
   

Extensive Green Roofs or Wildlife Roofs are becoming more popular, as people become more aware of biodiversity issues and options for conservation. These are designed either to replicate the specific habitat needs of a single or small number of species, or to create a range of habitats which can maximize the array of species which inhabit and use the roof.

Because of their very wide range of environmental and economic benefits (in particular their insulation and cooling properties, ability to significantly reduce rainwater runoff from roofs, and their value in promoting biodiversity and habitat in built-up areas), green roofs have become important elements of sustainable and green construction in many countries. Moreover, because they can be highly visible, green roofs clearly signal the intent for sustainable building and can provide a building or development with a positive and distinctive image.

   
         
    Benefits of Green Roof Areas:    
         
       
   
* Our applicators carefully seal around penetrations, vents, skylights, dormer windows and chimneys to ensure a leak-free roof.

**
The information on this page is a brief introduction to the Green Roof - Living Roof System. For more information, specs and data sheets, please visit the supplier website or email us with your enquiry.

New Zealand Green Roof - Living Roof System suppliers: Nuralite, Equus, Sealco, Jaydex, Allnex, Viking, Ardex, Allco, ABEP, Sika and Hitchins.
   
   
   
         
    Roof Restoration    
    Flat Roof - Terraces - Decks - Balconies - Gutters - Canopies    
         
       
         
    Roof Repair and Roof Restoration     
         
   

Another huge benefit is that some quality roof restoration systems are forever sustainable!  At the end of each warranty term, you can clean and reapply a new topcoat and get a brand new warranty with a brand new extended warranty term.  It's like getting another new roof for far less money than what even a new restoration system would cost. All the prep work required for the original restoration system would not be required at this point.  This approach would preclude the need for a tear-off forever! It's good for the environment and certainly good for your roof and pocket.

In addition to the product itself, what is also important is the contractor used to install the roof restoration system.  Any product, no matter how good it is, requires a proper adhesion test to verify compatibility with the existing roof.  Failing to do this simple but important procedure can mean the difference between product success or failure.  In fact, restorative roof manufacturers require an adhesion test as part of their warranty requirements.

Roof Restoration is a viable solution. If you are in the market for a new roof, a roof restoration system is an option that should be considered.  A rooftop evaluation, adhesion test and a roof that is in restorable condition will afford you many benefits i.e. reduced cost, less mess and noise as well as environmental benefits.
 
So make sure you are getting the best information.  Make an informed decision and give us a call to schedule your free rooftop inspection and evaluation.

   
   
   
         
    Re-Roofing    
    Flat Roof - Terraces - Decks - Balconies - Gutters - Canopies    
         
   
A good roof is certainly the most important part of any home, as it protects you and your family from the harshness of Mother Nature. When your roof begins to show signs of wear, it is vital that it be repaired or replaced entirely, so that you can keep your family safe and ensure the value of your home.

Do I even need to re-roof?

Of course, you're probably not an expert on flat roofs. But if your roof is in really bad shape, it's likely that you will be able to tell.
   
         
       
   
If you've seen any of the signs above, it's probably not safe to walk around up there, and it might be time for a re-roofing.

When re-roofing, selection of a roof that meets the stylistic and practical needs of your home is very important. Talk to an expert about initial cost, energy efficiency, and durability.


Calling a Professional Roofing Contractor

Have us look over your roof to determine if you just need a repair or an entirely new roof.  We are licensed and we have a great deal of experience, plus the appropriate qualifications and a long-standing and positive reputation.

We will explain the local building regulations which might limit the materials you'll be to choose from, but when the job is completed, you should have a beautiful, durable, and cost efficient roof that will last for years and years.
   
         
         
    * Please contact us in Christchurch for free advice on waterproofing the roofs, decks, parapets, walls and basements of your projects.    
   

 

   
    Phone:  022 444 4475  |  E-mail:  info@h2off.co.nz  |       
       
         
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