Hello. I am replacing two windows where there is a problem of rain water leaking in. The lintels are also being replaced. The side of the house where the windows are being replaced is exposed to all weather elements. To resolve the leak, we are hoping to fit cavity lintels. The builder has said we won't need end caps on the lintels but reading up on the matter I'm under the impression they are required. Would appreciate any thoughts . Thanks in advance.
