Yes, you can drill small holes in a composite door for a knocker, number or letterplate, but drill carefully and sparingly. The skin is thin glass-reinforced plastic over a foam or timber core, and holes in the wrong place can weaken the door, let moisture in or void the guarantee.
How do you drill into a composite door safely?
- Mark the spot and keep clear of the lock, hinges, edges and glazing
- Use masking tape and a sharp bit to stop the skin chipping
- Drill a small pilot hole, never a large one
- Use self-tapping screws or fixings made for the core
- Seal the hole with a little exterior sealant to keep water out
Where should you not drill a composite door?
Avoid the lock area, the edges, around the glass and any place over the multipoint mechanism or steel reinforcement. Foam cores hold ordinary screws poorly, so heavy items may need a different fixing method.
Will drilling void the composite door guarantee?
It can. Many guarantees exclude damage from alterations, so check the terms or ask the installer before drilling anything beyond a standard accessory.
If you are unsure, Wednesfield Trade Windows, a family-run, Certass-registered installer, can advise on fixings when fitting your composite doors.
Thinking about a new door? We supply and fit doors across Wolverhampton and the surrounding area, and you deal directly with us, the owners. Call 01902 633355, message us on WhatsApp, or request a quote.