Telescopic Letterbox Colours and Finishes Available

Telescopic Letterbox Colours and Finishes Available

A telescopic letterbox provides a neat, adjustable solution for modern doors and composite panels; choosing the right colour and finish affects durability, appearance and long‑term maintenance. This post covers common material options, factory finishes, trade tips for specification and practical DIY fitting and maintenance guidance suitable for UK homeowners and trade professionals.

Common materials used for telescopic letterbox bodies

The material of the telescopic tube and faceplate determines corrosion resistance, finish options and suitability for coastal locations. Typical materials include:

• Aluminium: lightweight and easy to powder coat or anodise; commonly used for bespoke colours and RAL matching.
• Stainless steel: robust; usually supplied in 304 for general use or 316 for coastal and highly corrosive environments.
• Brass and bronze: used for traditional aesthetics; available polished or lacquered but require more maintenance.
• Zinc alloys or plated steel: economical; often chrome or nickel plated for a bright finish but can be less durable outdoors if plating fails.

Finishes and their practical advantages

Different finishes suit different installations. Consider climate, expected wear and the surrounding door hardware when specifying a finish.

• Powder coated: available in virtually any RAL colour; provides excellent UV and abrasion resistance when correctly pre-treated. Good for matching window and door frames.
• Anodised aluminium: provides a natural metallic appearance with superb corrosion resistance; common in clear, bronze and black anodised finishes.
• Brushed stainless steel: contemporary look; hides fine scratches and requires minimal upkeep. Choose 316 stainless for seaside properties.
• Polished chrome or nickel plated: high shine finish common on modern doors; plating thickness and base metal quality determine longevity.
• Polished or lacquered brass: traditional and high-end appearance; lacquer helps preserve the look but will wear over time and may need re-lacquering.
• Textured and matt finishes: popular for concealing fingerprints and small marks; often specified in anthracite grey or black to match hardware ranges.
• PVD coatings: for premium colours and enhanced durability; available in gold, bronze and black variants with better resistance than conventional plating.

Colour matching and RAL specification

For trade installations and refurbishment projects, RAL matching simplifies procurement and ensures a consistent look across door and window hardware. Common choices for front doors include:

• RAL 7016 Anthracite grey: popular for contemporary composite doors.
• RAL 9005 Jet black: low‑gloss or matt variants are common on minimalist schemes.
• RAL 9016 Traffic white: crisp, classic option often used with bright doors.

When specifying powder coated finishes, request a certified RAL code and sample swatch; remember that colours can vary between suppliers and batches, so order matching items together when possible.

Trade tips for specifying telescopic letterboxes

Professionals should consider the following points to ensure the component performs as expected:

• Measure door thickness accurately: telescopic letterboxes are adjustable but have a maximum and minimum; common ranges are 35–65mm and 40–100mm. Confirm the product range before ordering.
• Environment: specify 316 stainless or marine‑grade powder coating for coastal installations to avoid premature corrosion.
• Security: select options with internal restrictors or anti‑fishing plates if required; ensure the selected finish does not impede additions like letter guards or draft excluders.
• Fire doors: many fire‑rated doors restrict the size or type of letterplate permitted. Check door manufacturer guidance and building regulations before cutting apertures.
• Lead times: bespoke RAL colours and PVD finishes can add manufacturing time; allow for this when scheduling work.

DIY fitting guidance

Homeowners and competent DIYers can fit a telescopic letterbox with basic tools; follow these practical steps and safety precautions:

• Tools and PPE: tape measure, spirit level, pencil, jigsaw or router with appropriate cutter, drill and bits, screwdriver, silicone sealant, and eye protection.
• Marking out: measure the required aperture carefully; centre the slot to the customer’s preferred height and check for internal obstructions such as glazing beads or lock hardware.
• Cutting the door: clamp a battens or use backing timber to reduce splintering for timber doors; for metal doors, use a metal cutting blade and deburr the edges.
• Fitting the tube: insert the telescopic tube from the inner face, adjust to the door thickness and locate the outer plate. Ensure the internal and external trims sit flush and that the flap operates freely.
• Fixing: use the recommended fixings; for timber doors use screws, for metal doors consider pop rivets or machine screws with captive nuts; seal with silicone to prevent water ingress where appropriate.
• Final checks: test flap action and letter passage; fit any internal restrictors or draught seals; wipe clean and allow sealants to cure before exposure to rain.

Maintenance to preserve finish and operation

Regular maintenance extends service life and preserves appearance:

• Clean finishes with mild soapy water and a soft cloth; avoid abrasive cleaners, especially on powder coated, anodised and brass surfaces.
• Lubricate hinges and moving parts annually with a light machine oil or silicone spray; do not use heavy greases that attract dirt.
• Inspect sealants and brush seals; replace worn EPDM or brush inserts to maintain draught proofing.
• For lacquered brass, consider re‑lacquering or professional polishing if tarnish appears; stainless will typically need only occasional cleaning.

Recommended Products

Based on this article, you may find these products helpful:

• E-Type Gasket - Black 5m Roll
• E-Type Gasket - Black (Per Metre)
• Structural Glazing Tape - 20mm
• Security Glazing Tape
• Top-Hung Window Hinge - Standard

Conclusion and next steps

Choosing the right colour and finish for a telescopic letterbox depends on door material, environmental exposure and the desired aesthetic. For coastal sites specify 316 stainless or high‑performance coatings; for exact colour matching use RAL codes and request swatches. Tradespeople should confirm door thickness, check fire door restrictions and allow lead time for bespoke finishes. Homeowners fitting their own unit should measure carefully, use appropriate fixings and follow basic sealing and maintenance steps.

Next steps: check the door thickness and environment, decide on a finish that matches your door hardware, and consult your supplier or trade rep for samples and lead times; if in doubt about fire door compliance or cut‑out positions, consult the door manufacturer before cutting.

For further technical resources and installation templates refer to our pillar page: /guides/letterboxes.