Regarding blocking up chimneys for a CWI measure, there is a concern that where there is residue of soot left in the chimney and a lack of ventilation if the balloons are used, this can potentially cause sulphur and condensation to react and eat away at the brick. Thus, what would you advise with blocking chimneys up, reducing this risk, and installing background ventilation?


Leave a Reply

T: 0330 055 7629
A: Barn 4, Dunston Business Village,
Stafford Road, Stafford, ST18 9AB

Terms & Conditions 
Policies & Procedures

Copyright © 2022 The Retrofit Academy. All rights reserved

Website by