Translation:We cleaned the house before they came.
Cad é na dífriochta idir sula agus sular? http://www.daltai.com/discus/messages/13510/50147.html?1265659245 http://www.irishgaelictranslator.com/translation/topic50469.html
Tá sé sin an fregair!
Agus ceist eile- cad é an difriul idir riomh agus sular? http://www.irishgaelictranslator.com/translation/topic88222.html
Ceapann go bhfuil siad níos easca le fhoglaim anois!
The Past Perfect isn't really used in Irish, but the structure Bhí an teach glanadh againn is used, and might be a better if you actually needed to use a perfect construction.
But this is the simple past, and "we had cleaned the house" isn't necessary and isn't "more correct".