Replacing Original Cedar Shake on a Columbia Home
A lot of Columbia’s earliest homes went up with cedar shake, and it suited the design language — natural material, weathering to grey, sitting quietly under the tree canopy. Those roofs are now decades old, and most are on their second or third covering.
If your home still has cedar, or had cedar at some point, replacement is a different project from a straightforward shingle tear-off. Here is what actually happens.
What Is Underneath Cedar
Cedar shake was typically installed over spaced sheathing — battens with gaps between, so the underside of the shake could breathe. That is the right way to install cedar and completely wrong as a base for asphalt shingles.
So a conversion is not just a tear-off. It involves decking over the battens with solid sheathing before the new roof goes on. That is real material and real labor, and it belongs on the estimate as a line item rather than appearing as a surprise on day two.
Other Things That Show Up
- Rotted batten ends at the eaves, where water has run for decades
- Original flashing let into masonry that has to be cut out and remade
- Ventilation that was adequate for a breathable roof and is not adequate for a sealed one
- Previous repairs where someone shingled over cedar without decking it — this happens more than it should
That last one is worth checking before you buy a Columbia home. A shingle roof laid straight over shake battens is a failure waiting to happen, and it is invisible from the ground.
Ventilation Changes When the Material Changes
A cedar roof over spaced sheathing breathes through the roof itself. Cover it with solid decking and asphalt and that airflow stops. If the attic ventilation is not brought up to match, the result is condensation, premature shingle aging from below and, in the worst cases, mold on the underside of the deck.
A proper conversion includes a ventilation calculation: intake at the soffits, exhaust at the ridge, balanced. Any estimate that does not mention ventilation is missing something structural to the job.
Staying With Cedar
Some homeowners want to keep it, and on the right house it is the right call. Cedar can be repaired selectively, and individual shakes replaced, which extends a roof considerably before full replacement is needed. HF Roofing Contractor’s cedar shake roofing work covers both repair and replacement.
The trade-off is honest: cedar costs more, needs maintenance, and needs someone who knows how to lay it. The payoff is a roof that looks like the house was designed to look.
Converting to Architectural Shingle
Most conversions go to architectural shingle, which has enough depth and shadow line to sit acceptably where shake used to be. Three-tab does not — it reads flat against a house designed for texture.
Color matters more than usual here, because you are changing the character of the roof. Weathered-wood and driftwood tones are the usual landing point. Your village architectural committee will have a view, which is why the approval step comes first — see the guide to roof replacement and village approval in Columbia.
What a Good Estimate Looks Like
- Tear-off of existing material, stated by number of layers
- New solid decking over spaced sheathing, with square footage and unit rate
- An allowance for rotted framing or batten replacement, with the rate shown
- Ventilation: what intake and exhaust is being added
- All flashing replaced, not reused
- Shingle product, color and wind rating named specifically
If decking is not on the estimate for a shake conversion, the contractor either has not looked or is planning to charge for it later.
Frequently Asked Questions
No. The surface is uneven and the sheathing is spaced. It needs decking first, whatever a cheaper bid tells you.
Enough that it needs to be in the estimate, and it varies with roof size and what condition the battens are in. Ask for the rate per square foot rather than a lump number.
If the shakes are largely sound and the failures are at flashing and fasteners, repair is far cheaper than replacement and keeps the original look.
It can, if ventilation is not corrected as part of the work. That is the main thing to check in the scope.
If Your Roof Is Original
HF Roofing Contractor works across Columbia and Howard County on both cedar and shingle. Homes of this era often have shallow roof sections and original skylights that should be addressed in the same project — see low-slope roofs on Columbia townhomes and skylights and sun tunnels in Columbia. Heavy tree cover shortens the life of whatever goes on next, which is covered in canopy, debris and gutters.
