If the boards were cut.
Cedar siding cupping.
Not to mention in your case they used staples and during expansion and contraction of wood they have no holding power.
Traditionally and currently shingles are cut from a block of wood.
Although intended primarily for restoring horizontal wood surfaces such as decks these products generally work almost as well on vertical surfaces.
Uncoated weathered western red cedar siding or trim can often be restored to its original color by applying commercial products called cleaners brighteners or restorers.
Don t over nail the siding that can cause both cupping and where the nails penetrate the skin of the hardboard siding surface future water damage is likely to occur.
Head lap for beveled siding when it is installed over foam should be at least one inch or 1 1 4 by come experts.
Cedar shingles bowing and cupping it s unlikely but they may have some recourse with the painter.
What should you do if your wood shake roof experiences curling.
Once the paint starts to peel costs can quickly grow as sanding out walls is not cheap.
Shakes and shingles can be used to cover the entire exterior or be installed in gables and other areas to complement wood or stone siding.
To be a professional painter and not know that you shouldn t paint shingles unprimed shingles at that is pretty bad.
Cedar wood siding should be painted or stained every 6 years or sooner depending on the level of uv exposure in order to reduce the costs of repainting.
Wood siding likely cedar in your case can be sawn from the tree in one of two ways.
Some cupping or curling expected with cedar but the reason for excessive cupping or curling like you show happens due to improperly nailing i e too high or to far from the edge.
However wood shingle curling is a good barometer of when your cedar roof needs maintenance.
Either radially like one cuts a pie or horizontally similar to slicing a tomato.
Cedar shake siding and cedar shingle siding is the look most buyers crave when they consider real wood siding.
If it s just a few shingles and the curling is minor there s no need to take action.