Timber Wafer Screws 10g x 35mm C3 (50 Pack)

The Timber Wafer screws 10g x 35mm C3 are the primary fixing for securing two-part joiner bases and the Sunglaze base to timber rafters and purlins. The flat, wide wafer head is the key feature: it holds the aluminium base firmly against the timber while staying slim enough that the polycarbonate sheets and top caps sit flat over it without obstruction.

Each screw carries a Class 3 (C3) galvanised coating that protects against corrosion in urban and industrial environments, which is the coating level you want for outdoor roof fixings that will never be seen again. At 35mm long and 10 gauge, the screw gives a solid bite into treated softwoods and construction hardwoods without stripping.

Because the screw head must not protrude into the joiner assembly, the wafer profile is essential. A bulky head would create a pivot point under the sheet and compromise the watertight seal. This screw is engineered to sit flush so the assembly closes cleanly.

Key Features

• 10g x 35mm, sized for timber rafters and purlins
• Flat wafer head that sits flush under the joiner
• C3 galvanised coating for outdoor corrosion protection
• Timber-specific thread for a secure bite
• Ideal for Sunglaze and two-part joiner bases
• Supplied in a 50 pack

Specifications

Applications

• Fixing the Sunglaze base to timber rafters
• Fixing two-part joiner bases to timber
• Pergolas, patios, verandas and carports

What You Need To Complete The Job

These screws fix the Aluminium Sunglaze Base to the timber frame, which is the first step of the joiner assembly. The full set of joiners and the Sunglaze sheets are in the Sunglaze category.

Frequently Asked Questions

What are wafer screws used for?

They fix the aluminium base tracks of a glazing system to a timber frame. The wide, flat head clamps the base down without protruding, so the sheet and the top cap can sit flat over the fixing point.

Why is the flat head important here?

In a two-part or three-part joiner, the base is installed first and the sheet and cap go on top. A bulky screw head would lift the assembly and create a pivot point that breaks the seal. The wafer head sits flush so the joint closes cleanly.

What does the C3 coating mean?

C3 is a corrosion classification for outdoor environments with moderate pollution and some salt exposure, typical of urban and industrial areas. It means the coating is engineered to protect the screw against rust for years in that environment.

Can these screws be used in metal frames?

No. These are timber screws with a timber-pointed thread. For steel or aluminium frames, use a metal-specific screw with a self-drilling tip and the matching head profile.

How many screws are in a pack?

Each pack contains 50 screws. The number you need depends on the length of joiner run, so allow for a screw at each fixing position along the base track and order enough packs for the job.