We are proposing to fit bi fold doors in a new extension, the doorway being approx 8 feet and to contain 3 doors. Would you install a heavy duty lintel or does the frame carry the weight of the doors?
Thanks.
What is the quality/difference between Catnic and IG lintels. We are building an extension and on the spec it says use Catnic or similar quality lintels. On getting various quotes, IG lintels appear cheaper.
Thanks.