We are currently building an extension for a client.
Its a pitched roof single storey extension meeting a vertical existing wall to the rear of the property. Inside there will be two openings from existing house to extension (ie two spots where dampness would be a problem in the cavity above)
The drawings mention cavity trays by means of 'cavity trays' hand written with an arrow pointing to the proposed roof. There is no further spec but they are mentioned.
Our usual sub contracted bricky has refused to fit them as he believes the "integrity" of the existing building would be breached. He has fitted them before but on this one the sloping roof either side of the extension come very close to existing upstairs windows. He also reckons they shouldn't be necessary as the back of the house is not exposed to the elements.
Spoke to BCO last week on the phone and without even seeing the property yet he has stated that they are required as they are specified on the drawings.
That leaves me needing to look into ordering them and finding someone to fit them.
What kind of trays should I be looking for?
Its a pitched roof single storey extension meeting a vertical existing wall to the rear of the property. Inside there will be two openings from existing house to extension (ie two spots where dampness would be a problem in the cavity above)
The drawings mention cavity trays by means of 'cavity trays' hand written with an arrow pointing to the proposed roof. There is no further spec but they are mentioned.
Our usual sub contracted bricky has refused to fit them as he believes the "integrity" of the existing building would be breached. He has fitted them before but on this one the sloping roof either side of the extension come very close to existing upstairs windows. He also reckons they shouldn't be necessary as the back of the house is not exposed to the elements.
Spoke to BCO last week on the phone and without even seeing the property yet he has stated that they are required as they are specified on the drawings.
That leaves me needing to look into ordering them and finding someone to fit them.
What kind of trays should I be looking for?