How do I select which waterproofing system I should specify for the project I’m working on?

There are so many considerations to the correct selection of waterproofing that it can certainly be confusing.  All the following elements impact on the options available to you; weight loading; thermal efficiency, wind uplift, finished build-up height, life expectancy, durability required depending on access levels and rooftop sited plant and equipment, guarantee duration.  The best way to ensure you have the correct system is to talk with your local Bauder contact. 
Arrange a meeting with your local area technical manager ►

 

I need a lightweight waterproofing system, what are my options?

There are two flat roof waterproofing options for projects that have a consideration for weight loading. Single ply uses synthetic membranes welded over the span of the roof and cold applied liquid utilises resins to create a homogenous waterproof layer. Both can be installed with insulation for a warm roof construction or without for a cold roof.
Learn more about single ply ►
Learn more about cold applied liquid ►
 

Who installs your flat roof systems?

We have a network of approved contractors that are permitted to install our systems. Each company must possess the technical expertise and operational facilities to maintain an efficient and well-run site. Additionally, their installers are individually trained specifically in the application of our products, so you are ensured an expert installation that meets the criteria for our guarantee. 
More on approved contractors ►
 

What does a Bauder roof guarantee cover?

Our guarantee covers all elements of our products, as well as all design features we were involved in and the installation of the system when carried out by one of our approved installers.  We provide a guarantee on all our projects and the duration reflects the system, its life expectancy and building requirements.
 

Can I use your cold applied liquid system in an inverted roof construction?

Yes you can use our LiquiTEC in an inverted roof construction on both new build and refurbishment projects.  You will need to use an insulation manufactured from polystyrene as it possesses the specific properties that can cope with the environmental demands that will be placed upon it and of course the insulation will require a form of ballast either as a green roof, pebbles or paving.  
More on LiquiTEC ►
 

What are the TEC DUO products that feature in your waterproofing systems?

These are our patented range of products that have been developed to make installation faster, safer, simpler and more secure than previously possible.  The patented technology features heat-activated and self-adhesive application. For example, the BauderTHERM DS1 DUO vapour barrier has a self-adhesive underside that adheres to the deck, colour coded laps that are welded to form a seal across the roof and an upper side with heat activated bonding stripes of bitumen that provide the adhesive required for installing the insulation.
 

The roof on the building I manage is now leaking, its an old asphalt roof which is now degrading. How can you help me identify the problem?

We will arrange a convenient time with you to come and carry out a survey of your roof which will appraise all aspects of the current waterproofing.  A core sample will help identify where the challenges are and additional technical diagnostics can pinpoint exactly where water ingress is occuring and the extent of the damage caused within the roofing system.  Just give us a call on 01473 257671, and we can arrange a survey to take place on your building by your local technical manager. 
More information on site surveys ►

 

How do I know which waterproofing is best to use for my roof refurbishment project?

There are so many options available to you with regard to waterproofing selection that it's best to speak with your local technical manager who will meet with you and discuss your project, any historical problems with water ingress, your budget and how the progamme of works can be scheduled as well as take you through all the benefits of each waterproofing system and how they map against your criteria.
Take a look at your options ►
Book a meeting with your local area technical manager ►
 

What is 'Moisture Mapping' and how will it help my failing roof?

It's a method of testing for trapped water within a flat roof containing multiple layers. A moisture gauge is used to pinpoint the presence of dampness within the roof structure to depths of 300mm with the results delivered as a topographical map.  This form of technical diagnostic is very useful in determining the extent of any water ingress and the remedial action required to reinstate the roof.  
Download more information ►

 

Can I put PV on my current flat roof?

Yes, as long as the additional weight loadings can be accepted by the building's structure.  An important factor is to ensure that the life expectancy of the waterproofing system currently on or to be installed on the roof will match that of the PV array, otherwise you may find that the waterproofing system will need replacing earlier resulting in the complete removal of the array before works can commence to reinstate the integrity of the roof.  The ideal time to add photovoltaics is to do it at the same time as refurbishing the waterproofing system.  
More on retrofitting PV ►

 

Why do I have to use one of your approved contractors to install my roof?

Our network of contractors undergo a rigorous selection process and their installers are individually trained specifically in the application of our systems, so you are ensured an expert installation that meets the criteria for our guarantee. Only by monitoring all aspects of the installation, including workmanship can we ensure that the system for your roof meets our standards.  
More on approved contractors ►

 

What does a Bauder roof guarantee cover?

Our guarantee covers all elements of our products, as well as all design features we were involved in and the installation of the system when carried out by one of our approved installers.  We provide a guarantee on all our projects and the duration reflects the system, its life expectancy and building requirements.

 

The building I manage has a profiled metal roof and I need to increase the insulation properties in the building. What do you suggest I do?

We have the ideal solution. Our profiled metal overlay system is specifically designed for this scenario. The system comprises of profiled EPS insulation boards, which are manufactured to order so that the profiles match the existing roof sheets. The insulation is then sealed with a single ply membrane system to make the building watertight. 
More on profiled roof overlay systems ►

How can I create falls on the roof without designing them into the deck?

Tapered insulation is one of the most cost-effective methods of introducing a fall to a flat roof. It is also significantly lighter than screed to falls solutions and does not suffer from lengthy drying times. 
More on tapered insulation ►

 

How do I start designing a green roof? There seems to so be many things to consider.

There are a lot of points to consider, and the place to start is to establish what finish the green roof is to have.  What is it to look like and who will access it?  Do you need to meet any planning conditions and would you also like to add PV to the roof?  
Learn more about the factors to consider ►
Book a meeting with your local area technical manager ►

 

I need help on designing a difficult detail, can you help me?

Absolutely. Just call out technical team for advice on how to create the detail for your project on 01473 257671.

 

What Bauder waterproofing systems hold BBA certification?

We have BBA certification on the following waterproofing systems and if you follow the links you can download the certificates from the webpage.
Bituminous membrane systems ►
Single ply waterproofing ►
Cold applied liquid ►
Hot melt waterproofing ►
 

I want to achieve a U Value of 0.18 W/m²K on a plywood deck with warm roof construction but have a maximum build up height of 150mm. What do you suggest I specify?

You have a couple of choices with regard to insulation type and waterproofing systems. Our bituminous, single ply and cold liquid applied will all work within your height constriants and can be used in warm roof designs.  Your choice of insulation is a little more restricted and will be primarily between PIR flatboard or foli-faced PIR FA-TE.  The exact combinations of both waterproofing and insulation can be determined by what needs the building has for durability, weight loading and life expectancy. 
More on profiled roof overlay system ►

 

To meet BREEAM and planning requirements both a green roof and PV need to be specified. I can't compromise on the roof area for the green roof as the full space needs to be vegetated. How can I deliver both?

We have a solution that combines the technologies enabling both to be installed without one compromising the other.  Bauder BioSOLAR is an integrated solution where the anchor board for the PV mounting rails is ballasted by the substrate and vegetation of the extensive/biodiverse green roof.  The PV modules are raised above the vegetation so that there is ample growing room for the plants so that they don't shade the modules and light and moisture can reach beneath the panel to support the plants.  
More about BioSOLAR ►

I'm designing an inverted roof, what insulation should I use?

Inverted roofs are designed with the waterproofing layer beneath the insulation.  Insulation boards are loose-laid on top of the membrane and then weighted down with paving slabs, gravel ballast or a green roof construction.  As such the insulation needs to be suitable for the exposure it is now subject to.  Polystyrene boards either extruded or expanded are suitable as they are impenetrable to water, resistant to rot and decay and have high compressive strength.  
More on inverted insulation ►

 

What is the insulation called VIP?

It's a vacuum insulation panel (VIP) which is utilised in areas with limited height.  The board is constructed from a Pyrogenic Silica core, surrounded by a multi layer high-barrier film with the air then removed to create the vacuum.  This is then protected by a 3mm rubber crumb base and a surface of 17mm PIR. It is extremely thermally efficient with a 60mm board achieving a Lambda Value of 0.009 W/mK.  
More on VIP insulation ►

 

I need a thin insulation solution on a refurbishment poject because of a door threshold challenges, what should I use?

A vacuum insulation panel sounds like the solution you need.  It's designed particularly with the challenge of limited installation height in mind and therefore ideally suited for roofs as well as balconies and terraces.  It has a thickness of 60mm to achieve a Lambda Value of 0.009 W/mK. 
More on VIP insulation ►

 

I want to achieve 0.18 W/M²K on a plywood deck, what insulation should I use?

All insulations can achieve 0.18, the difference between them is the thickness required and the weight loading of each type.  For instance a Bauder foil-faced PIR board will be 120mm thick and weigh 3.6 Kg/m²; BauderJFRI expanded polystyrene will be 200mm thick and weigh 7Kg/m² and BauderROCK mineral fibre insulation will be 200mm thick and weigh 27.2 Kg/m².  Our technical team can help you with heights and weight loadings should you need assistance, just give us a call on 01473 257671.  
More on insulations ►

 

What is the difference between your PIR flatboard and PIR FA-TE?

Our flatboard PIR is faced with a mineralised glass fibre and is specified when a torch-bonded underlayer is to be used beneath the cap sheet. Our FA-TE board is faced with aluminium foil which further increases thermal efficiency and can only be used with self-adhesive underlayers. As a comparison a 120mm board of FA-TE provides the same thermal value as 140mm of BauderPIR flatboard. 
More on PIR insulation ►

What deck should be used beneath a green roof?

When deciding on a deck, thought should always be given to the loading it will have to take.  It is possible to use a concrete deck with a wood float finish, metal or timber (plywood should be an exterior WBP grade).  If you are considering an alternative deck, please give us a ring and we will confirm suitability with you. 
More about weight loadings of a green roof ►
 

I need a really lightweight green roof, what should I use?

The lightest weight green roof is the XF301 sedum blanket system which is a pre-cultivated 'turf' comprised of low growing, low maintenance succulent plants (sedums) that is rolled out directly on top of the root resistant or protected waterproofing.  It only has a saturated weight loading of 44Kg/m² making it ideal for new build or retrofitting to a current building.  
More about sedum blanket green roofs ►
 

How do I look after my green roof?

All green roofs require a minimum of two inspections a year to ensure that the rainwater outlets are maintained.  An intensive green roof will need the regular care associated with the garden planting scheme and landscaping.  An extensive green roof will only need minimal maintenance to ensure that any unwanted species do not become established. 
More information on maintaining a green roof ►
 

What is the difference between substrate and soil in a green roof?

A substrate is a lightweight alternative to soil which reduces weight loadings on the green roof whilst still providing a base for the plants and vegetation to grow in.  It doesn't hold nutrients as efficiently as soil and so annual applications of granular fertiliser are often required to sustain the plants. 
More information on green roof components  ►

 

My extensive green roof is to incorporate a vegetation barrier. What is it and why will it be on my green roof?

A vegetation barrier is created using washed round pebbles and is primarily incorporated to prevent vegetation encroaching on elements such as rainwater outlets, provide wind uplift resistance at roof perimeters.  
More information on functions ►
 

How do I decide between having a green roof or PV on my roof and which gives the best environmental benefit?

You don't have to choose between the two technologies, you can have both in an integrated solution.  A BioSOLAR system incorporates a water retention board in the mounting system and uses the substrate and vegetation as the ballasting mechanism for the installation method.  A key element of a combined system is that the PV panels are elevated to allow for vegetation growth without blocking light to the modules.  
More on BioSOLAR ►
 

What is the weight loading of an intensive green roof?

This is dependant on the depth of substrate and the planting scheme, though a typical guide for a roof garden ustilising 200mm of substrate would be 270Kg/m².  The system summary PDF covers the components typical and the associated weight loadings.
More on a generic roof garden build up ►
 

What is a sedum blanket?

It's a pre-cultivated vegetation mat incorporating a mix of established sedum plants that is supplied in a 'turf' format to be rolled out onto a roof giving instant coverage.  
More on sedum roofs ►
 

I need to incorporate a green roof to meet a Biodiversity Action Plan (BDAP), what should I be specify?

This will depend on what biodiversity species you need to encourage on the roof and the plants stated in the report.  If the requirement is more generic, you can consider a wildflower blanket or seed mix which will satisfy the requirements of BREEAM or planning. 
More on biodiversity green roofs  ►

How many panels will I need to give a 100kWp output and what roof area will the array require?

You would need 322 panels with 310Wp capacity rating, all orientated at due south. This number of panels would require 966m of flat roof without any areas of shading. We can produce calculations and an array layout for you if you need assistance. Call our technical team on 01473 257671 for more information.

 

To meet BREEAM and planning requirements both a green roof and PV need to be specified. I can't compromise on the roof area for the green roof as the full space needs to be vegetated. How can I deliver both?

We have a solution that combines the technologies enabling both to be installed without one compromising the other.  Bauder BioSOLAR is an integrated solution where the anchor board for the PV mounting rails is ballasted by the substrate and vegetation of the extensive/biodiverse green roof.  The PV modules are raised above the vegetation so that there is ample growing room for the plants so that they don't shade the modules and light and moisture can reach beneath the panel to support the plants. 
More about BioSOLAR ►

 

How is your PV system attached to the flat roof? A different supplier is planning on mechanically fixing the rails through the waterproofing and into the deck, but I'm unsure that this method will ensure the waterproofing is intact?

A distinctive element of our solar system for flat roofs is that the installation doesn't require any penetrations of the waterproofing or roof deck, even in a non-ballasted arrangement. Our system utilises membrane-to-membrane fixing techniques to secure the mounting units to the roof. The weld areas create a very stable base for the units and PV modules, even in areas at risk of high wind uplift.  
More on our BauderSOLAR system and images of installation method ►

 

Where should the photovoltaic panels be sited?

The ideal siting for a PV array on a flat roof is with a due south orientation, on an area without possible shading from overhanging trees, other buildings or lamp posts etc.

 

I have trees near my roof, will your photovoltaic system still work if some of the panels are occasionally in shade?

When modules are in shade their performance can be affected. If you install a power optimiser each individual module is monitored to determine the maximum power point (MPP) so that any shading does not impact on the entire string. This monitoring system can give up to 25% more output from an array.  
More on power optimisation ►

 

Can I retrofit a PV array on my building's flat roof?

Yes, as long as the additional weight loadings can be accepted by the building's structure. An important factor is to ensure that the life expectancy of the waterproofing system currently on or to be installed on the roof will match that of the PV array, otherwise you may find that the waterproofing system will need replacing earlier resulting in the complete removal of the array before works can commence to reinstate the integrity of the roof. The ideal time to add photovoltaics is to do it at the same time as refurbishing the waterproofing system. 
More on retrofitting PV ►