A verb for “to roof” in The Etymologies of the 1930s under the root ᴹ√TOP “cover, roof” (Ety/TOP).
Early Quenya
tupu-
verb. to roof, put lid on, put hat on, cover
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Early Primitive Elvish
tupu
root. *cover
tḷdḷ
root. *cover
Middle Primitive Elvish
tup
root. *cover
tōp-
verb. to roof
Qenya
tópa-
verb. to roof
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
An unglossed root in the Qenya Lexicon of the 1910s, apparently a variant of ᴱ√TELE “cover in”, with derivatives ᴱQ. talda “covered” and ᴱQ. tildi- “to cover” (QL/93). There are no signs of this root in Tolkien’s later writing.