Why choose Impact Wood Screws 5.0 x 70mm

Impact Wood Screws 5.0 x 70mm are high-strength timber fixings for roofing,
leadwork substrates and general construction where you need extra length for secure penetration.
The zinc yellow passivated finish provides practical corrosion resistance for internal and sheltered
external use, while the impact-ready drive supports fast, consistent installation with modern impact drivers.

The 70mm length is particularly useful for thicker build-ups and structural timber work—fixing through
ply or firrings into joists, securing noggins, or tying timbers together where shorter screws don’t provide
enough bite. For roofing and leadwork, reliable fixings help keep substrates stable so membranes and lead
coverings can perform as intended.

Key benefits

• Extra penetration: 70mm length suits thicker timbers and built-up substrates.
• Strong timber fixing: 5.0mm diameter provides excellent holding power and pull-out resistance.
• Impact compatible: Designed for efficient installation with impact drivers and drills.
• Zinc yellow passivation: Added protection for routine site conditions and sheltered exposure.
• Trade tub efficiency: Tub of 1200 keeps teams moving on repeat fixing tasks.

Typical uses on site

Use Impact Wood Screws 5.0 x 70mm for firrings, battens, noggins, timber framing and roof-deck build-ups,
especially where you’re fixing through sheet materials into structural timber. They’re also a solid choice for
general carpentry and construction tasks requiring a longer screw for dependable purchase.

Good practice & workmanship

Select fixings to suit substrate thickness and design load. Drive screws straight and seat the head neatly without
over-tightening, which can crush boards and reduce holding performance. Where timber supports roofing membranes or
lead coverings, consistent fixing patterns help reduce movement, deflection and joint telegraphing.

At a glance — Impact Wood Screws 5.0 x 70mm

Always follow project specifications and fixing schedules. Choose screw length and diameter to suit timber thickness,
board build-up and load conditions.

Using Impact Wood Screws 5.0 x 70mm in roofing and leadwork substrates

In roofing construction, long-term performance depends on a stable substrate. Impact Wood Screws 5.0 x 70mm
are commonly used to secure firrings and battens, and to fix through plywood or packers into joists where added length is
needed for dependable purchase.

Correct fixing depth and consistent spacing help prevent substrate lift, board movement and differential deflection. On warm
roof build-ups and refurbishment work, the 70mm length can be especially useful where you’re fixing through multiple layers
into structural timber.

For leadwork applications, secure substrates support thermal movement without distortion. Reliable timber fixings help reduce
the risk of joint telegraphing and contribute to long-term performance of lead bays, flashings and apron details.