Rosenfeld Kidson News

Timber trends and information

 

NZ Architects leading the way for responsible specification

Check out our Joint Presentation with Rosenfeld Kidson & FSC New Zealand at Jasmax here

FSC© 100% certified hardwoods TONKA and GARAPA finding favour with specifiers and the construction industry alike.

Rosenfeld Kidson has recently supplied timber to a number of high profile projects further enhancing Auckland’s spectacular waterfront.

TONKA

TONKA has become the hardwood timber of choice for public space developments in applications such as boardwalks, wharfs, bridges and other structural end uses; as well as heavy exterior furniture, shelters and residentially for pergolas and posts etc.

In addition to its environmental credentials, it is favoured for its superior characteristics of strength and durability, its attractive colour and great weathering properties.

Below images show the newly completed Devonport Wharf and Marine Square project. A legacy North Shore project, this major infrastructural upgrade was delivered jointly by Auckland Council and Auckland Transport. Taken together with the new library, also clad in Western Red Cedar supplied by Rosenfeld Kidson, this represents the most significant Council investment in Devonport for a very long time.

FSC 100% certified timbers supplied to the project include Tonka for the boardwalk material, Iroko used as the handrail and Massa seating.

GARAPA

GARAPA is becoming the preferred hardwood timber choice for smaller dimension applications such as exterior furniture and joinery, public boardwalks and domestic decking. It has all the benefits of a stable and durable hardwood, with the added features of being from an environmentally responsible source and having negligible tannin release.

GARAPA is an attractive honey-brown colour and has a fine texture that weathers very well and is not prone to checking/splitting.

PEFC certified AUSTRALIAN hardwoods have also made a resurgence, being specified for a number of large local body projects in Auckland. These include SPOTTED GUM supplied by Rosenfeld Kidson to the Westhaven Promenade project and JARRAH for another large downtown project being completed towards the end of the year.

Rosenfeld Kidson & Co. Ltd is a specialist timber merchant and importer, incorporated in 1930. We stock New Zealand’s largest range of over fifty species, both imported and locally grown and are the only importer to offer a full and comprehensive range of FSC 100% certified hardwoods.

We distribute to the construction industry, joiners, furniture manufacturers, cabinetmakers, boatbuilders and flooring contractors throughout New Zealand, primarily via selected reseller merchants from our sales and warehousing facilities based in Auckland and Christchurch.

 

Larch Cladding Making a Statement

Larch cladding is now available in our Vertical, Rusticated, Bevel Back and Board and Batten cladding systems. Customised corner and jamb detailing have been developed to effortlessly blend with our range of 28mm thickness Vertical and new Rusticated weatherboards.

Larch has a very pale appearance with a strong grain pattern and tight knots. The extreme climate from which Larch originates produces slow growing conditions, resulting in close growth rings and a fine grain. Larch also possesses a high resin content and coupled with its naturally high density has great durability properties. These characteristics produce a timber of great depth and texture that is a unique alternative to other timber claddings in the market. Factory oiling in a our ‘Larch-specific’ range of Dryden Woodmaster blondes and silver greys further compliment this distinctive material.

 

FSC 100% certified hardwoods supplied to Devonport Wharf upgrade

Rosenfeld Kidson recently supplied 200x75mm Tonka structural wharf decking for the Devonport Wharf upgrade. In addition to its environmental credentials, Tonka is favoured for its superior characteristics of strength and durability and also its attractive colour and weathering properties.

In addition, FSC 100% certified Iroko was used for the feature handrail and Massa for the street furniture. Follow this link to read an article on this project from the landscape architect involved Isthmus Group.

Read more...

 

Rosenfeld Kidson provide solid timber flooring for Welcome Shelter at Longbush Ecosanctuary

The Longbush Ecosanctuary Welcome Shelter is an innovative environmental education space designed as a gateway for visitors to a very special environment, which includes several critically endangered native species. The ecosanctuary is approximately 120 hectares and over the past 15 years has been the rapidly restored through the efforts of Jeremy and Dame Anne Salmond.

Constructed by a team of passionate volunteers from donated materials, including timber flooring from Rosenfeld Kidson, the Welcome Shelter utilises very simple construction techniques. The aim of the shelter is to use minimal architectural resources while promoting active stewardship of our natural environment. The Welcome Shelter facilities are free of charge for all visitors, including school groups, ecologists and tourists.

Rosenfeld Kidson were proud to have the opportunity to provide Australian solid hardwood flooring for the Welcome Shelter, as we found the project intent was in line with our business values.

The project was generated and designed by the award winning designer Sarosh Mulla. Mr Mulla’s current doctoral research focuses on creating innovative forms of architecture for the New Zealand tourism industry, while continuing to promote the role of the architect as a leader within communities.

The design of the structure draws on the framing techniques of the picturesque, but applies these through contemporary forms, which promote active engagement with the environment. Rather than simply viewing the landscape, visitors are encouraged to take part in the environmental restoration occurring at the ecosanctuary, through the programs offered at the Welcome Shelter.

A large steel and fabric canopy provides shelter from the sun and rain for an outdoor classroom created on the hillside. Below the roof the form of this classroom is defined by the position of three timber enclosures and small retained gardens.

The design plays with the connotations of natural and synthetic materials in the setting of the recovering environment. Each timber enclosure provides a different service, including the storage of teaching material, ablution facilities and an office for the site ecologist. This office opens up to the exterior with a large drawbridge to create a level platform on teaching and demonstration days.

Another enclosure includes a roof deck from which a stunning view of the valley can be appreciated. This deck is accessed via a traditionally made greenwood ladder, made from a Manuka tree harvested from the building site.

With the removal of invasive pests and weeds, alongside the planting of hundreds of thousands of native trees, the diverse ecology at Longbush is beginning to thrive again. Never before in New Zealand history has such a large and diverse group of volunteers and sponsors created a piece of public architecture.

The Welcome Shelter creates a new benchmark for high quality, community generated, architecture that responds to the needs of the local environment.

Visit the website

All photos courtesy of Sarosh Mulla.

 

As featured in Trends

This contemporary suburban home designed and built by multi-award winning Cameron Ireland Builders, with architect Jack McKinney, is one of several modern homes built on the site by Ireland.

The garage and floating box are clad in black-stained vertical cedar weatherboards supplied by Rosenfeld Kidson together with Garapa hardwood decking and cedar fence palings.

 

Stunning Koia House Showcases Wanaka Style

Koia Architects select innovative 45mm structural cavity system & Rosenfeld Kidson timbers
  • Western red cedar cladding blends Southland exterior aesthetics of high country resilience, and provides interior glow.
  • Innovative new 45mm structural cavity system enables improved weather protection and ventilation while allowing more depth around windows for a clean exterior profile.
  • FSC 100% certified Garapa hardwood decking timber marries perfectly with the chosen materials and surrounds.
Koia Architects designs Law House in the Wanaka hills

The Law house is a superb example of New Zealand architecture with cool clean lines and a breath-taking outlook over Lake Wanaka.

Designed to complement and enhance the spectacular natural landscape, the Law House utilises its great location and aspect to maximise views and energy efficiency. Wide windows and decks on two sides provide a nearly continuous outlook and a feeling of being connected to the dramatic and spacious surroundings.

"We have worked hard to ensure the building blends with the environment. The timber cladding is a very important component of this. The Rosenfeld Kidson corner and jamb profile is a beautiful way to detail these junctions. The window flashing system we developed has been refined to work with this and ensure the water protection, drainage, air seal and insulation all align as they should."

Tony Koia, Principal Architect, Koia Architects

For the house’s distinctive exterior cladding Koia Architects chose Western Red Cedar. Cedar has a very low shrinkage factor and therefore is very stable.

"Many builders in Wanaka will only use cedar as their timber cladding. The climate has a very low humidity which causes significant shrinkage. It can cause damage to any antique furniture on the inside of a house and the exterior of a house is a much harsher environment." - Tony Koia.

Western Red Cedar varies from dark brown to pink and readily accepts stains and oils to provide a wide choice of palette. Available in an endless variety of profiles, finishes and coating products, cedar provides designers and architects with great design flexibility.

Western Red Cedar was also employed for internal panelling throughout the Law House.

"We wanted to create a 'warm glow', reminiscent of a ski lodge, to the living room. In a bright large glazed area, cedar panelling absorbs the light and minimises glare.

Using cedar for the interior has worked really well to link the exterior to the interior, and combine with the local schist and break up other flat painted surfaces.
- Tony Koia.

The 45mm structural cavity system utilises a structural 45mm Radiata cavity batten with vertical shiplap Cedar weatherboards. The ventilated cavity batten is fixed to the wall framing without requiring additional supporting dwangs or nogs meaning it is much easier to install.

The primary benefit of a 45mm structural cavity system is that the cladding only needs to be fixed to the batten itself and not through the building envelope, helping to maintain the integrity of the air seal. The 45mm structural cavity also allows for improved drainage and ventilation.

"With the 45mm structural cavity system, the exterior nails do not penetrate the RAB board lining, which means there is significantly reduced risk of water penetration and better pressure equalisation.

There is less risk of water or air leakage, and the better ventilation provided by the system means better drying. Windows and doors can be recessed to the insulation and RAB board line to ensure these are a continuous line around the perimeter."
- Tony Koia.

The greater cavity space provided by the 45mm structural cavity system allowed the recessed windows in the Law House design to be brought forward to the outer line of the framing, rather than recessed behind it.

Attractive, hard wearing timbers that suit Wanaka’s stunning landscape

Koia Architects specified Garapa for the striking deck of Law House. Garapa has a history of success in New Zealand, tried and tested in our country’s varied climatic conditions for almost a decade.

Garapa is a honey brown colour with a very fine finish which appealed to Koia Architect’s Tony Koia on an aesthetic level.

"I think the colour and grain of Garapa wood is better suited to Wanaka than most timbers, as it blends beautifully with the natural surroundings." - Tony Koia.

Because Rosenfeld Kidson’s Garapa is a kiln-dried timber, it delivers great properties of stability in addition to its great durability. Garapa also does not suffer end-checking or leach staining tannins in the way some other hardwoods can.

As well as having many superior properties compared to other hardwoods available on the market, Garapa is environmentally certified as FSC 100%, which is the most stringent third-party environmental standard available.

"We had designed an outdoor bath which is hidden under a removable deck cover. This meant we needed a timber that wouldn’t leach into the bath, so we wanted an alternative to Kwila. We also wanted a more sustainable hardwood, and the colour of Garapa made it an attractive alternative." - Tony Koia.

A great builder ensured the vision was faultlessly realised

"It is essential to have a quality builder at any time and Tony Quirk Builders have been great. Their attention to detail has been particularly impressive in aligning the cedar sacking to the interior to the doorway openings; and it is this quality that is needed to create architecture." - Tony Koia.

About Koia Architects

Koia Architects was established in Auckland, New Zealand in 1995 by architect, Tony Koia. The practice has expanded over the years and a second office was established in Queenstown in 2004. Each commission is special and unique. Every client brings a different hierarchy of requirements and Koia Architects identify these at the outset - whether they are aesthetic, quality, time or budget constraints - so a successful outcome is achieved. For more see www.koia.co.nz.

 

Tonka hardwood timber used for Taupo boardwalk development

When Taupo District Council decided to landscape the viewing platform on their new waterfront Water Treatment Plant, they considered all durable hardwood timber options available from New Zealand timber merchants.

After speaking with the expert team at Rosenfeld Kidson about which boardwalk decking timber would provide the best aesthetics and performance, Tonka hardwood in ex 200x50mm boards were chosen. This material has also been utilised for a series of steps and other landscaping features.

Tonka was selected by the Council as it is considered a very durable, stable and attractive hardwood timber perfectly suited for boardwalk decking and use as a landscaping timber.

Rosenfeld Kidson’s Tonka also meets the Council’s strict environmental sourcing policy. Tonka is sourced from legal and well-managed resources. It is independently audited at every step of the supply chain and carries FSC 100% certification. Independent, third-party audited chain-of-custody (CoC) certification provides designers, specifiers and consumers with absolute assurance that those forest and wood products labelled as FSC 100% originate from verified legal sources, which are managed to prescribed social, economic and environmental standards.

 

Rosenfeld Kidson Environmentally Certified Hardwood

Is the exterior hardwood timber you are buying or specifying independently verified as being harvested legally and responsibly from well-managed forests?

Rosenfeld Kidson is able to offer New Zealand's most comprehensive range of certified hardwoods.

There are an increasing number of hardwood timbers available on the market used for decking, landscaping and joinery. Together with a lack of sourcing information and myriad of claims, specifying and using the correct timber can be very confusing.

The simplest way to answer these two questions is to source timber that has been independently certified as coming from well-managed forests. The two most globally recognised environmental certification schemes are FSC® (Forest Stewardship Council®) and PEFC™ (Programme for the Endorsement of Forest Certification™).

Both these schemes are independent, non-governmental, not-for-profit organisations established to promote the responsible management of the world's forests through independent third-party certification.

There are an increasing number of hardwood timbers available on the market used for decking, landscaping and joinery. Together with a lack of sourcing information and myriad of claims, specifying and using the correct timber can be very confusing.

The simplest way to answer these two questions is to source timber that has been independently certified as coming from well-managed forests. The two most globally recognised environmental certification schemes are FSC® (Forest Stewardship Council®) and PEFC™(Programme for the Endorsement of Forest Certification™).

Both these schemes are independent, non-governmental, not-for-profit organisations established to promote the responsible management of the world's forests through independent third-party certification.

Certified Hardwood Species Available from Rosenfeld Kidson

Rosenfeld Kidson can offer a full range of certified hardwoods, a selection of the most popular species are as follows:

GARAPA FSC 100% A light yellow to honey-brown hardwood timber with a fine texture. It is a stable, durable and very attractive timber used primarily as domestic decking, exterior furniture and joinery. Garapa Fact Sheet
TONKA FSC 100% A durable and stable structural hardwood of uniform light brown colour. Dense, hard, extremely strong with high impact resistance; it is used for landscaping, boardwalks, pergolas and heavy construction. The timber of choice for many Councils around the country for public space developments. Tonka Fact Sheet and Durability Appraisal
MASSA FSC 100% Also known as Pacific Jarrah, it is a dark reddish-brown hardwood timber. Hard, heavy, strong & very durable. Used in exterior construction, decking & joinery. Massa Fact Sheet
IROKO FSC 100% Iroko is golden orange to brown. Colour darkens with age. The grain is interlocked and texture rather coarse but even. Very stable timber used for interior and exterior joinery, outdoor furniture, boatbuilding and as a substitute for teak. Iroko Fact Sheet
VICTORIAN ASH (AUSTRALIAN OAK) PEFC 100% Mixture of two Eucalypt species ranging from pale pink to brown straw in colour. Quartersawn grain suitable for interior use as joinery and flooring. Victorian Ash Fact Sheet
KARRI PEFC 100% Heartwood is reddish-brown. The grain is interlocked with some wavy grain, the texture is even, moderately coarse and prone to checking. A moderately durable timber ideal for general construction, as it is available in clear long lengths, large sections and well priced. Karri Fact Sheet
Questions to Ask:
  1. Is the supplier's total stock of the timber species 100% certified as being from legal and well managed sources, by a credible independent certification body?
  2. Is the supplier CoC (Chain of Custody) certified?
  3. Can all the timber be supplied together with paperwork showing: 1. Details of supplier & timber supplied, 2. FSC or PEFC logo, 3. Formal Claim e.g. FSC 100%, 4. Supplier CoC code?
What is CoC (Chain of Custody)

CoC is an information trail about the path taken by products from the forest to the consumer including each stage of processing, transformation, manufacturing and distribution where progress to the next stage of the supply chain involves a change of ownership.

Independent, third party audited CoC certification provides designers, specifiers and consumers assurance that those forest and wood products labelled as FSC or PEFC do, in fact, originate from legal sources which are managed to prescribed social, economic and environmental standards.

What is VLO (Verified Legal Origin)

VLO certification states that the producer and its resource are a legal entity operating within the local laws and regulations of the producer country and that this has been verified by a third party. VLO certification does not make any reference to the sustainability of the source.

 

Rosenfeld Kidson Cedarscreen PLUG Nails

Another advancement in weather tightness is our new innovative nail with a thicker collar, designed to better close the hole created from face nailing at an upward angle.

These are available in 60mm, 75mm and 85mm in silicon bronze or stainless steel 316, with a decorative pentagon head.

Cedarscreen Vertical

Our structural 45mm batten system for vertical shiplap cedar weatherboards is finding great popularity in the market with an increasing number of benefits arising:

  • Cost savings arising from no additional supporting dwangs required
  • Better weather tightness as face fixings do not penetrate the air seal
  • H3.2 MCQ treatment for battens environmentally preferable and less corrosive
  • Easier face fixing with only 60mm RK PLUG nails required
  • Better insulation values and ventilation
  • More depth in façade to play with around windows
Cedarscreen Rusticated & Bevel Back

Rosenfeld Kidson is able to offer horizontal Rusticated Cedar Weatherboards and Bevel Back Weatherboard systems with a comprehensive suite of details in a range of formats available from our Cedarscreen website.

These systems are compliant as both direct fixed and cavity fixed wall cladding materials with fixing methods in accordance with Acceptable Solution E2/AS1.

Cedarscreen Board & Batten

Rosenfeld Kidson can also offer details for traditional Board & Batten Weatherboarding.

Cedarscreen Board & Batten is a compliant direct fixed wall cladding material with fixing methods in accordance with Acceptable Solution E2/AS1.

 

Cedarscreen launch

From New Zealand's early days as people searched for more durable construction materials, simple no-nonsense timber weatherboards have been inextricably linked to the concept of good building and great architecture.

This sentiment continues today as Rosenfeld Kidson launch their new, revolutionary Cedarscreen Cedar Weatherboard cladding systems.

Rosenfeld Kidson has made several significant advances to the weather tightness, buildability and aesthetic appeal of Cedar cladding.

Cedarscreen Vertical

A revolutionary Vertical Shiplap Cedar Weatherboard system available with either a ventilated 20mm or structural 45mm Radiata cavity batten.

Structural cavity batten

Rosenfeld Kidson has developed an innovative wall cladding system for use with Vertical Shiplap Weatherboards that utilises a structural 45mm Radiata batten. The Rosenfeld Kidson CS-H 45mm structural, ventilated cavity batten is fixed to the wall framing, without the need of additional supporting dwangs.

The primary benefit of this system is that the cladding is only required to be fixed to the batten itself, helping to maintain the integrity of the building envelope and air seal. The 45mm cavity also allows for improved drainage, ventilation and insulation.

Rosenfeld Kidson cavity battens are treated to H3.2 and the first to use the ‘environmentally preferable’ MCQ treatment.

These systems are tested fully in accordance with E2/AS1/VM1 External Moisture Verification Method Testing Building Facades and NZS 4284:2008 Testing Building Facades Specific Design. Testing was carried out at an IANZ accredited facility and included cladding junctions with windows, doors, soffit, penetrations, internal and external corners.

It’s in the detail

Today's technically advanced cladding systems and enhanced profiling and machining methods, mean that Cedar cladding can be manipulated to exploit the full range of possibilities that timber provides.

From the cool clean lines of narrow profiled boards with Rosenfeld Kidson’s crisp new corner profiles, through to random depth and width weatherboards that evoke images of the craggy landscape and richly textured environment that many of our buildings find themselves in.

Cedarscreen Rusticated & Bevel Back

Rosenfeld Kidson is able to offer horizontal Rusticated Weatehrboards and Bevel Back Weatherboard systems with a comprehensive suite of details in a range of formats available from our Cedarscreen website.

These systems are compliant as both direct fixed and cavity fixed wall cladding materials with fixing methods in accordance with Acceptable Solution E2/AS1.

Cedarscreen Board & Batten

Rosenfeld Kidson can also offer details for traditional Board & Batten Weatherboarding.

Cedarscreen Board & Batten is a compliant direct fixed wall cladding material with fixing methods in accordance with Acceptable Solution E2/AS1.

FactoryOil

A range of coating options and choice in texture create a myriad of opportunities for designers to draw from further, to create many unique solutions for your construction project.

Applied under controlled conditions to a strict quality assurance programme, the Dryden Woodoils used in our FactoryOil coating process protect the cedar from within, reducing the effects of climate and the often harsh conditions encountered in New Zealand.

Visit the Cedarscreen website.

Rosenfeld Kidson, as timber merchants acknowledge the importance of conserving the world’s greatest renewable resource.

We are pleased to advise that we carry Chain-of-Custody (CoC) certification that enables us to sell timber that carries either FSC certification (SGS-COC-006703) or PEFC certification (SGS-PEFC/COC-0993).

FSC certified timber and PEFC certified timber undergo independent, third-party audited certification procedures at every step of the supply chain. This provides designers, specifiers, architects and consumers absolute assurance that those forest and wood products labelled as FSC certified or PEFC certified originate from legal sources, which are managed to prescribed social, economic and environmental standards.

As a New Zealand timber supplier offering the country’s largest range and quantity of specialist certified timbers we believe that stocking FSC & PEFC certified timber is essential for our continued growth. A major part of our timber range has FSC or PEFC certification and we are continually striving to increase this.