New Felt Roof

If your old flat roof is starting to leak, bubble, or crack, it might be time to think about a new felt roof. Replacing a roof can seem like a big job, but getting it right makes all the difference. At Flat Roofs Lanark, we’ve been working with felt roofing systems for over 40 years — and here’s what every homeowner should know before taking that next step.

 

 

 

 

1. Know When It’s Time for a Replacement

 

 

Flat roofs don’t last forever. Most felt roofs last around 20–25 years depending on how well they’re looked after.

Here are a few signs yours may be ready for replacement:

 

• The surface has cracks, splits, or blisters

• Water is pooling or leaking through the ceiling

• The roof feels soft or uneven underfoot

• You’ve had to patch it several times already

 

 

💡 Tip: Minor issues can often be repaired, but if problems keep coming back or cover large areas, a full replacement will save you money in the long run.

 

 

 

 

2. Choose the Right Roofing System for Your Needs

 

 

Not all felt roofs are the same. There are a few different systems depending on your property type and budget:

 

• Single-layer felt: best for small garden sheds or outbuildings

• Double-layer felt: offers strong protection for garages and extensions

• 3-tier system: the most durable and energy-efficient option for long-term performance

 

 

A 3-tier felt roof includes an underlay, high-quality insulation boards, an overlay, and a mineral-finished top layer.

This design helps keep heat inside during winter and reflects heat in summer, giving you a more comfortable, energy-efficient home.

 

💡 Tip: If your property suffers from heat loss, upgrading to an insulated 3-tier system is one of the most effective improvements you can make.

 

 

 

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3. Always Start with a Clean Base

 

 

Before installing a new felt roof, it’s important to inspect and prepare the surface properly.

Old or damaged layers should be stripped back if they’re trapping moisture, and the decking below should be checked for rot or soft spots.

A clean, solid base ensures your new roof bonds correctly and lasts for decades.

 

💡 Tip: Don’t be tempted to simply overlay a badly worn roof — it can trap damp and shorten the lifespan of your new system.

 

 

 

 

4. Invest in Professional Installation

 

 

Felt roofing is a skilled trade. The quality of the installation makes a huge difference to how long your roof lasts.

Professionals ensure correct torch application, perfect overlaps, and fully sealed edges — all vital for waterproofing and durability.

 

💡 Tip: Always ask about experience, insurance, and guarantees before hiring anyone to work on your roof.

 

 

 

 

5. Look for a Strong Guarantee

 

 

A properly installed felt roof should give you peace of mind for decades.

At Flat Roofs Lanark, we offer a 20-year guarantee on all new roofs, using tried and tested materials for maximum lifespan.

 

💡 Tip: A guarantee shows that the installer stands behind their work — never skip it.

 

 

 

 

Final Advice

 

 

A new felt roof is one of the best ways to protect your property from weather and wear while improving energy efficiency.

By choosing the right system, preparing the base properly, and using an experienced installer, you’ll have a roof built to last.

 

If you’re unsure what system suits your property best, contact Flat Roofs Lanark today for free, no-obligation advice and a quote.