Advice please re assurance Dommages Ouvrages

[Pommier]

We bought a new house which has leaks on the garage roof. Eventually the builders referred it to the insurance company who sent out a surveyor. He told us that the zinc joint between the garage roof and the wall of the house wasn't sufficiently covered by render, and that he'd authorise doing another coat of render from the front of the garage back.

Today we've received paperwork from the insurer and it looks as if he's changed his mind.

The quote attached to the paperwork says:

Pignon sur toiture des garages 3 & 4

Sur murs au dessus des solins

Impermeabilite Systeme L1

Lavage à la pompe Hp

Traitment fongicide

1 couche IRTOP SC diluée

Caifeutrement des ouvertures

Pontage des fissures au galon B60 enrobe de SC

Finition IRTOP 'VELOUTE'

Total cost €360 plus TVA

The insurers have asked that we sign and return a paper headed 'Quittance d'Indemnité'

which says

Je soussigné (our name & address) bénéficaire de contrat 'dommages ouvrage' cité en référence, declare accepter de la Compagnie Allianz, l'indemnité de

430,56 euros

en réparation des dommages suivants:

dommage infiltration d'eau dans garage

Moyennant ce paiment, je donne quittance pleine et entiere à la Compagnie Allianz et je la subroge dans tous mes droits et actions à l'encontre des responsables des dommages à hauteur du versement effectué

Fait à...............le......................

Signature........................

Two questions really. Does this sound as if it'd fix the problem? (it doesn't seem likely to me!)

Secondly, is the 'quittance d'indemnité' me signing away any future claim?

Any advice gratefully received.