Damp Proofing

What size wall vents do i need for my shed?

Anonymous user 23/02/2024 - 3.47 PM

I have a shed that measures 363cm x 243cm (143 Inches x 96 Inches). I have put 2 x vents in the walls, One at either end, one high up and one low down. The circle hole i cut in the wall for each vent was 150mm (about 6 inches). I need good ventilation as fishing equipment is kept in the shed so its a lot of damp items, last year i had really really bad mould issues in the shed due to this, so i have now put these vents in the walls to try stop the problem. Are they enough? The shed is on patio tiles (sandstone) so not soaking up water from mud / grass, the floor is dry, it is also raised off the floor on wooden boards, about 75mm i would say. There is no tree near the shed, there is a fence only which covers the northern and eastern sides of the shed. I'm just looking for some kind of calculation to what size holes i need to make sure there is enough ventilation so this winter I don't get black mould again. I currently have 2 x 150mm holes cut out and vents with mesh put in them.