If the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists.
Strengthening floor in loft.
In the case of 2x6 joists you can pair them up with additional 2x6 joists by nailing them together side by side.
Ive just strengthened my loft floor.
Nail the new joist to the existing joist with two rows of 10d to 16d nails spaced 6 in.
Plywood firmly fastened to the undersides of joists helps prevent this side to side bending and stiffens the floor.
It s the easiest way to create safe access to equipment in your loft or simply to generate storage space while keeping your loft insulated to regulations.
Store floor award winning loftzone storefloor creates a lightweight but incredibly strong system of raised beams that support a safe deck above your insulation.
It has a drop down loft ladder with handrail and a roof velux.
A layer of 3 4 in.
It s mainly going to be used as a chill out tv room for the kids.
Use a sledgehammer or a pry bar to force the bottom of the new joist along the mudsill and center support beam of the floor system or the opposite mudsill on short spans until it s flat against the existing joist.
For this fix to work well the upper edges of the joists must be solidly fastened to the subfloor above.
Quick loft joist question for potential loft conversion by dylant sat oct 27 2018 12 59 pm last post by dylant sat.
Advice needed on strengthening loft floor for storage by gordon hill tue jan 28 2020 11 53 am last post by gordon hill tue jan 28 2020 11 53 am replies 0 views 331.
I ve not gone down the regulations route as it s not going to be used as a bedroom.