A felt garage roof is one of the most common roof types in the UK, and it’s also one of the most repairable — when the problem is local. The mistake homeowners often make is paying for repeated patches on a roof that’s already failing across the whole surface. Therefore, it helps to know when patching is sensible and when a full recover (overlay) gives better value.
This guide explains the difference, what each option includes, and how roofers decide which route to take.
First: What Does “Full Recover” Mean?
A full recover usually means an overlay on top of the existing felt system (rather than stripping everything off). Roofers may:
- keep the existing roof if the deck is sound
- improve preparation and detailing
- install a new felt layer (or system) over the whole roof area
- renew edges, trims, and outlet details
If the deck is damaged or wet, a “recover” may not be suitable — then it becomes a strip-and-replace job.
When Patching Works (And Is Worth Doing)
Patching is usually a good choice when:
1) The damage is local and obvious
Examples include:
- a small split in the felt
- a puncture hole from impact
- a localised blister that has cracked
- a small leak at one seam near an edge
2) The surrounding felt is still in decent condition
If the felt around the leak is:
- well-bonded
- not brittle
- not cracking everywhere
…a patch often performs well.
3) The roof deck feels firm (no soft spots)
A patch needs a stable base. If the deck is soft or spongy, water has likely damaged the structure underneath — then patching becomes poor value.
4) There’s no widespread ponding problem
If water sits in a low spot and the felt is stressed in that area, you may get repeated failures. Patching can still work, but it’s more likely to become a recurring job unless drainage is improved.
5) The roof is relatively young or was installed well
A newer roof with one defect is a classic patch candidate.
Typical patch jobs roofers do well on garages:
- edge lift repairs
- small seam reinforcement
- localised felt patch with correct overlap and bonding
- outlet detail repair (if localised)
When Patching Stops Making Sense (And a Full Recover Wins)
A full recover usually becomes the better option when:
1) You’ve got multiple leaks or multiple repair patches already
If the roof has a “patchwork quilt” look, the felt is likely failing more widely.
2) The felt looks brittle, cracked, or crazed across large areas
Once felt ages and becomes brittle, new cracks appear elsewhere. Therefore, patching becomes a cycle.
3) Seams are failing along long runs
If several seams are lifting or splitting, it’s rarely a one-off defect.
4) Edges are failing along the whole perimeter
Garages often leak at edges first. If edge felt is lifting in several places, a recover with new edge detailing is often better value.
5) The roof surface has widespread blistering
Widespread blistering can suggest trapped moisture or bonding issues. Patching individual blisters can work short-term, but it usually doesn’t solve the underlying cause.
6) The roof has persistent ponding water
If water sits regularly and the roof is ageing, a recover often provides a stronger fresh surface and allows the roofer to improve detailing at the same time.
What a Proper Patch Repair Includes (Garage Felt Roof)
A proper patch is more than “paint-on” sealant.
It should include:
- identifying the true entry point (edges, seams, outlets)
- cutting back to sound, well-bonded felt
- cleaning and drying the area properly
- priming where required
- applying a correctly sized patch with generous overlap
- bonding with a compatible method (torch-on or cold-applied, depending on safety)
- resealing or rebuilding nearby edge/outlet details if they contribute
If a roofer can’t explain these steps, the felt roof repair may not last.
What a Proper Full Recover Includes (Garage Felt Roof)
A full recover should include more than laying new felt over old felt.
A good recover usually covers:
- inspection to confirm the deck is sound and dry
- preparing the surface (cleaning, removing loose areas, correct priming)
- installing a full new cap sheet across the roof
- renewing edge trims/drip details
- rebuilding wall upstands (where garage roof meets a wall)
- renewing outlets and checking gutter fall
- tidy finishing and clean-up
Because edges and outlets are the usual failure points, a recover must improve those details.
Patch vs Recover: Quick Decision Table
| Condition | Patch is likely OK | Recover is usually better |
|---|---|---|
| One small split or puncture | ✅ | |
| Leak clearly at one edge detail | ✅ | |
| Felt is generally sound and bonded | ✅ | |
| Multiple cracks across the surface | ✅ | |
| Several seams failing | ✅ | |
| Many old patches already | ✅ | |
| Edges lifting in multiple places | ✅ | |
| Deck feels soft/spongy | ✅ (or full replacement) |
Typical Costs (UK Guide)
| Work type | Typical cost range |
|---|---|
| Small felt patch repair (garage) | £200–£600 |
| Patch repair with edge/outlet detail work | £350–£900 |
| Full recover / overlay (single garage) | £900–£2,500+ |
| Full recover / overlay (double garage) | £1,500–£3,500+ |
| Deck replacement (add-on if needed) | £400–£2,000+ |
Access, roof size, number of details, and whether the deck is sound drive the cost.
How to Get the Right Quote (Without Guessing)
Step 1: Describe the leak pattern
Does it leak only in heavy rain? Only in wind? Or after prolonged rain?
Step 2: Mention age and past repairs
Tell the roofer if the roof is already patched in several areas.
Step 3: Ask one key question
“Is the deck sound and dry enough for a recover, or do you recommend stripping?”
That question helps avoid paying for the wrong solution.
If your felt garage roof is leaking, submit a quick enquiry with your postcode and photos. We’ll match you with local roofers so you can compare free, no-obligation quotes.
FAQs
Can you recover a felt garage roof without stripping it?
Often yes, if the deck is sound and the existing roof isn’t saturated. A roofer should confirm this before recommending a recover.
How long does a full recover last compared to patching?
A full recover can extend roof life significantly because it renews the whole surface and key details. Patching can last well for local defects, but it doesn’t stop new failures on an ageing roof.
What if the deck is rotten?
If the deck is rotten or soft, roofers usually strip back, replace the deck, and then install a new roof system.
