Care, Maintenance and Warranty

The JMF range of exterior timber joinery supplied by Dando Doors and Windows meets or exceeds the requirements of the New Zealand Building Code NZS:4211:2008.

All our JMF range of NZS:4211 compliant joinery has been designed and tested to perform under the most diverse New Zealand weather conditions, and:

• have been successfully tested for strength under a range of wind pressures appropriate for the various wind zones in New Zealand

• meet the requirements for deflection under simulated loads

• meet stringent requirements for waterproofing and air leakage

JMF Website - https://jmfnz.co.nz

DURABILITY. JMF Compliant timber joinery products can be expected to have a trouble-free serviceable life of not less than 15 years as required by section B2 of the New Zealand Building Code. This pertains specifically to the structural elements of the joinery. Durability can only be achievable if joinery is fully painted before being exposed to weather.

In the course of normal use, decorative elements and non-structural fittings such as window fasteners, door rollers and the like may need to be replaced as they wear out. This process does not contravene the B2 Durability requirements of the New Zealand Building Code or the warranty. Decorative coatings are not covered by this warranty and should be covered by warranty from coatings suppliers.

Please Note: All compliant timber joinery must be correctly installed by a Licensed Builder as outlined in the Building Code Acceptable Solution Clause E2/AS1 External Moisture.

CARE & MAINTENANCE OF EXTERIOR TIMBER JOINERY

SITE STORAGE

All joinery products must be kept in a cool dry area free from moisture and direct sunlight immediately on arrival to site. Your timber joinery must be stored on an even surface to avoid twisting and damage.

PAINTING

All preparation and painting must be carried out in a good tradesman-like manner and to the current requirements of AS/NZS 2311 Guide to Painting of Buildings and the paint manufacturer’s data sheet.

A minimum of two top coats of quality paint must be applied to all six surfaces before joinery is exposed to the weather to ensure a good moisture seal and help reduce swelling of the timber and prevent moisture damage.  If painting does not occur within six weeks, sanding and repriming will be required. Timber joinery left unpainted and exposed to the weather will cause changes in the timber moisture content, leading to expansion and contraction damage to the joinery, mould and rot, and will void our warranty.

You will need to apply a minimum of two successive coats to all primed surfaces, paying special attention to tops and bottom of doors and sashes especially the end grains. All joinery that has had timber removed /drilled or checked out for hardware including locks, catches etc must have a coat of primer immediately on removal of timber. The paint skin should overlap onto the glass 2mm on the exterior surface to ensure a proper seal.

Do not use dark colours as this may cause timber to swell and may void warranty.

If clear sealing the joinery use a film forming product, not an oil product.

CARE AND MAINTENANCE

It is a recognised trade practice that exterior timber joinery is designed for sheltered exterior use and should not be exposed to driving rain, direct sunlight or extremes of humidity. In locations where extreme weather conditions are found, additional installation/painting precautions should be taken to improve the products performance, which are not considered normal trade practice.

A complete waterproof paint skin must be maintained at all times on all edges. Routine maintenance for joinery includes re-coating when wear or breakdown becomes apparent. Re-coats should be applied at an early stage of breakdown to ensure the integrity of the seal is maintained and failure to do this will cause rapid deterioration. Please ensure your paint supplier coating and recoating instructions are strictly adhered to.

For ongoing maintenance and care of your joinery, timber surfaces need to be kept clean (normally annually with a damp cloth and light detergent), and any unpainted timber repainted to ensure sufficient surface coating to protect the joinery from water ingress.

WARRANTY INFORMATION

We provide a warranty for all our timber joinery products against failure of materials and workmanship for 10 years from date of invoice. For Goods not manufactured by us, the warranty shall be the current warranty provided by the manufacturer of the Goods. Dando does not provide a warranty for the glazing, the glazing manufacturer/installer has their own warranty.

Dando Doors and Windows will provide remedial works to correct any defects that develop in respect to any timber joinery due to faulty materials or workmanship, and does not extend to any materials and/or services provided by any subtrades which by example includes glazing, glass and hardware supply and installation.  All warranties for subtrades work and supply are to be obtained by you as customer direct from any such service/goods suppliers and shall not be the liability of Dando Doors and Windows.

This warranty is limited to the repair or replacement of the faulty product at the company's discretion but does not extend to the installation or refinishing of a replacement product. No consequential losses will be considered. The liability shall not exceed the original invoice value of the applicable joinery product at fault.

Remedial work carried out under the terms of this warranty does not include painting.

No liability shall arise unless a claim is made in writing to Dando Doors and Windows within 30 days of the defect arising or being reasonably discoverable by the purchaser. Copies of documentation showing the purchase date of the product should be included with your written claim.

Failure to follow the recommendations outlined above and below may result in product failure and void any warranties.

No liability will be accepted for the timber joinery products supplied by Dando (excluding glazing and hardware and subtrades) where problems or damage occurs from the following conditions:

1. If the product has been installed incorrectly or not in accordance with the relevant building codes and practices. Noting the joinery is not designed as "load bearing" meaning that no structural loading or "sag" will now or in the future be supported by the joinery. The frames must be installed straight, level and plum both vertically and horizontally.

2. The product has not been suitably painted and sealed on all six surfaces and maintained in accordance with industry recommendations. See Painting and Care and Maintenance section above.

3. The product has been subject to misuse, physical damage or neglect.

4. Manufacturing standards and tolerances are not deemed defects.

5. Minor warping or twisting up to 6mm can occur and is expected as normal. Shrinkage and or expansion does occur from seasonal changes in temperature and moisture. Variations in colour, texture or grain of timbers are a natural occurrence for which the manufacturer cannot control and are not considered defects.

6. Warranty claims for damage distortion of the product due to being painted in a dark colour where the product is exposed to direct or indirect sunlight will not be accepted.

7. If air conditioning is used in a confined and non-ventilated area all warranties will be void.