This is a lovely prayer gleaned from Usenet. It could prove useful in any house blessing ritual.
Touch the lintel and touch the wall,
Nothing but blessings here befall!
Bless the candle that stands by itself,
Bless the book on the mantle shelf,
Bless the pillow for the tired head,
Bless the hearth and the light shed.
Friends who tarry here, let them know
A three fold blessing before they go.
Sleep for weariness - peace for sorrow
Faith in yesterday and tomorrow.
Friends who go from here, let them bear
The blessing of hope, wherever they fare.
Lintel and windows, sill and wall,
Nothing but good, this place befall.