A teak altar can be built in the Altar space of the Chapel in a player-owned house. It requires 50 Construction to build and when built, it gives 360 experience. The player must have a hammer and a saw in their inventory to build it.
It gives 110% Prayer experience when bones are offered at it. With one incense burner lit, it gives 160% Prayer experience, while two lit incense burners will give 210% experience. Lit torches or candlesticks give no experience boost. Since the lowest incense burner requires a construction level of 61, and since a cloth covered mahogany altar can be built at level 60, the experience boost from a teak altar will seldom be more than the extra 10% obtained from the altar itself.