We've stripped off the ceiling in our downstairs kitchen to expose the joists between the ceiling and the floor above.
These joists have varying circular holes cut through them to allow hot water / central heating pipes to run through them.
We want to lag the pipes with pipe wrap, but this would necessitate making the holes slightly larger in diameter.
What is the rule of thumb regarding how big a hole can be in a joist before the joist weakens too much?
These joists have varying circular holes cut through them to allow hot water / central heating pipes to run through them.
We want to lag the pipes with pipe wrap, but this would necessitate making the holes slightly larger in diameter.
What is the rule of thumb regarding how big a hole can be in a joist before the joist weakens too much?