Hi charlotte your house will not settle if its such a large gap i do no that they are aloud a small gap to allow for settlement but if you think it looks large chances are it is, they used the nhbc trick on me bec ause all that happens with nhbc is they would come out and look at and advise the builder to plate it very unsightly and just masking the problem if i were you i would speak to persimmon and tell them you are not happy and will be withholding the money if the gaps within tolerance they should be able to seal it if not they will pack it with a black foam material which can just be taken out and leaves a hole, please do not be fobed of with nhbc thing as they just passn the complaints back to the builder to sort as they please and it is to the lowest uncostly standard possible,Remember if something dosent look right chances are its not and in my experience the builder will say and do anything to get your money then the fighting starts its very distressing please dont make the same mistake as me i trusted there word and its now costing me thousands i would get a second opion from a surveyor.
please let me know how you go
lynn
Redrow Homes Defect Woes by Lynn