DriStud wall wrap and roofing underlays engineered

Pre-cladding components — building wraps, roofing underlays and tapes, play a crucial role in all buildings.

Excess moisture generated within busy living spaces through cooking, bathing, washing and drying has to go somewhere. The humid air usually ends up at ceiling level, or when this is permeable it ends up in the attic space. Roof underlays with a higher moisture vapour transmission rate (MVTR) ensure more moisture vapour can permeate out to ventilation. DriStud roofing underlays have one of the lowest water vapour resistance and absorbent layer undersides (passed driptest recommended by BRANZ) in the market. By using DriStud, moisture management within roof spaces can be accomplished with peace of mind.

There are many products in the NZ market that seem to be similar, but these products are designed to perform in specific spaces. For example, not all wall wraps can go on gable ends, and behind non-absorbent claddings. Some roofing underlays cannot be used under skillion roofs.

DriStud Wall Wrap and Roof Underlays are engineered to outperform all the performance parameters required by NZ Building Code. These are engineered to breathe for NZ weather conditions.

Water vapour resistance values of DriStud products

DriStud Wall Wrap: NZS 2295: 2006 requirements are ≤7 MN s/g, DriStud Wall Wrap is 0.33 MN s/g.

DriStud FRU 38 (Fire Retardant Self Support Synthetic Roof Underlay): NZS 2295:2006 requirements are ≤7 MN s/g, DriStud FRU is 0.64 MN s/g.

Why specify DriStud?

Top quality materials, engineered for NZ weather conditions
CodeMark certified
New innovative products
Price-competitive and readily available
Complete range of wall and roof underlays with complementary products
Specification available in Masterspec
Researched to be one of the best products in the NZ market
Commercial and residential grade products
Well established company (Since 1937)

Why are DriStud products preferred by Builders and Roofers?

Not only does DriStud outperform on the requirements, it is also very price competitive compared to other products of its type. DriStud is finding that there is a growing demand from builders and roofers for their products as they are easy and simple to install.

Who is TCL Hunt?

TCL Hunt is a New Zealand owned company with 70 years of history. TCL Hunt has been in the building industry for over 20 years. The company introduced one of the first synthetic wall wraps to the NZ market.

DriStud FRU36 — Fire Retardant Synthetic Self Support/Heavy Weight Roof Underlay

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DriStud FRU36 is a white synthetic tri-laminate roofing underlay that is water resistant, vapour permeable and fire retardant.

DriStud FRU36 is intended for use on buildings designed in accordance with NZS 3604:2011 paragraph 1.1 and in wind zones up to and including ‘Extra High’.
DriStud FRU36 is designed to be used as a replacement for standard kraft paper roof underlay.
It can be installed over both timber and steel framing to ensure a dry roof cavity.
DriStud FRU36 can be used under: masonry tiles, metal tiles, profiled metal roof claddings. However, DriStud FRU36 must be fully supported with a corrosion resistant material where roof pitch is less than 10 degree.

Where CodeMark is to be relied upon, then all conditions of that certificate must be met. These are:

Must be installed in accordance with the DriStud FRU 36 Installation Guide Rev 1.
DriStud FRU36 may be installed over timber and steel roof framing.
The certificate covers the use of DriStud FRU 36 under: masonry tiles, terracotta tiles, metal tiles, profiled metal claddings, slate and composite panels.
DriStud FRU36 can span upto 1200mm.

When specified and installed in accordance with the requirements of the Installation Guide, DriStud FRU 36 roofing underlay will comply with the following provisions of the NZ Building Code:

Clause B1 Structure: B1.3.1, B1.3.2, B1.3.3 (a, h)
Clause B2 Durability: B2.3.1(a), B2.3.2(b) (15 years)
Clause C Protection from Fire: C3.4(c)
Clause F2 Hazardous Building Materials: F2.3.1

CodeMark

DriStud FRU38 — Fire Retardant Synthetic Self-Support Roof Underlay

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DriStud FRU38 is a white synthetic tri-laminate roofing underlay that is water resistant, vapour permeable and fire retardant.

DriStud FRU38 is intended for use on buildings designed in accordance with NZS 3604:2011 paragraph 1.1 and in wind zones up to and including 'Extra High'.
DriStud FRU38 is designed to be used as a replacement for standard kraft paper roof underlay.
It can be installed over both timber and steel framing to ensure a dry roof cavity.
DriStud FRU38 can be used under: masonry tiles, metal tiles, profiled metal roof claddings.

Where CodeMark is to be relied upon, then all conditions of that certificate must be met. These are:

Must be installed in accordance with the DriStud FRU38 Installation Guide Rev 1.
DriStud FRU 38 may be installed over timber and steel roof framing.
The certificate covers the use of DriStud FRU 38 under: masonry tiles, terracotta tiles, metal tiles, profiled metal claddings, slate and composite panels.
DriStud FRU38 can span up to 1200mm between adjacent supports. Where the span exceeds 1200mm a corrosion resistant mesh or alternative i.e. plastic strapping must be used.

When specified and installed in accordance with the requirements of the Installation Guide, DriStud FRU 36 roofing underlay will comply with the following provisions of the NZ Building Code:

Clause B1 Structure: B1.3.1, B1.3.2, B1.3.3 (a, h)
Clause B2 Durability: B2.3.1(a), B2.3.2(b) (15 years)
Clause C Protection from Fire: C3.4(c)
Clause F2 Hazardous Building Materials: F2.3.1

CodeMark

DriStud RU24 — Synthetic Self Support Roof Underlay

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DriStud RU24 is non-fire retardant self-supporting black faced synthetic roofing underlay.

Intended for use on new and existing buildings in wind zones up to and including ‘Extra High’, as defined in NZS 3604:2011.
DriStud RU24 is designed to be used as a replacement for self-supporting kraft paper roof underlay. It can be installed over both timber and steel framing to ensure a dry roof cavity.
DriStud roofing underlays must be installed with all writing and imagery facing out and with as minimal a number of overlaps as possible.
Where overlaps are unavoidable a lap of 150mm minimum must be used.
DriStud RU24 must not span more than 1.2 m between adjacent supports.
DriStud roofing underlays must be installed as described in paragraph 8.1.5, E2/AS1.

If designed, installed and maintained in accordance with the conditions of the CodeMark Certificate, DriStud RU 24 roofing underlay will comply with the following clauses of the New Zealand Building Code:

B1 Structure: B1.3.1, B1.3.2. With respect to B1.3.3, (a), (h).
B2 Durability: B2.3.1 (a), B2.3.2 (b).
F2 Hazardous Building Materials: F2.3.1

Will contribute to compliance with;

E2 External Moisture: E2.3.1, E2.3.2, E2.3.7 (a), (b), (c).

CodeMark