Roofing questions answered
Short, direct answers to the specific, practical questions homeowners, landlords and buyers ask about their roofs, each answered in the first lines and then explained.
4 min readHow Do You Know if a Roofer Is Good?
4 min readWhat Is Meant by a Pitched Roof?
4 min readHow Do Flat Roofs Drain Water?
4 min readHow Long Does It Take to Replace a Roof?
4 min readHow Do You Emergency Patch a Roof?
4 min readCan You Walk on a Slate Roof?
Roofing in general 20
- How Do You Know if a Roofer Is Good?
- Can I Get a Grant to Repair My Roof?
- Do Roofers Work in the Rain?
- How Much Deposit Should a Roofer Ask For?
- Do Roofers Need to Be Qualified or Registered in the UK?
- How Many Quotes Should You Get for Roof Work?
- Do Roofers Charge VAT?
- Roof Work in a Conservation Area: What Changes?
- Can You Re-roof a Listed Building?
- Do You Need a Party Wall Agreement for Roof Work?
- Who Pays for Repairs to a Shared Roof?
- Does a New Roof Add Value to a House?
- What Should a Roofing Guarantee Cover?
- What Is an Insurance-Backed Roofing Guarantee?
- Why Is My Roof Leaking When Nothing Looks Damaged?
- Condensation in the Loft: Causes and Fixes
- When Is the Best Time of Year for Roof Work?
- Do You Need Scaffolding for Roof Repairs?
- What to Do if You're Unhappy With a Roofer's Work
- Roof Problems After Buying a House: What Are Your Options?
Pitched roofing 20
- What Is Meant by a Pitched Roof?
- What Are the Disadvantages of a Pitched Roof?
- How Long Do Concrete Tile Roofs Last?
- What Causes Slipped Roof Tiles?
- Can You Replace a Single Roof Tile?
- Is Sagging Roof Felt a Problem?
- Can You Match New Tiles to an Old Roof?
- How Heavy Are Concrete and Clay Roof Tiles?
- What Is a Hipped Roof?
- What Is a Gable Roof?
- What Are the Eaves of a Roof?
- Can You Walk on Roof Tiles?
- Why Are My Roof Tiles Lifting in the Wind?
- Do Roof Tiles Need Clips?
- What Is Roof Pitch and How Is It Measured?
- Why Are My Clay Roof Tiles Flaking?
- What Is a Mansard Roof?
- Do I Need Tile Vents?
- Why Is My Roof Sagging?
- Does Roof Tile Colour Matter?
Flat roofing 20
- How Do Flat Roofs Drain Water?
- What Are the Three Types of Flat Roof?
- What Is the Cheapest Roofing for a Flat Roof?
- Why Is My Flat Roof Leaking?
- Is Standing Water on a Flat Roof a Problem?
- What Is the Minimum Fall for a Flat Roof?
- Can You Lay a New Flat Roof Over the Old One?
- Can You Walk on a Flat Roof?
- Can a Flat Roof Be Used as a Balcony or Terrace?
- Does a Flat Roof Need Ventilation?
- How Long Does It Take to Replace a Flat Roof?
- What Is Liquid Roofing?
- Can a Flat Roof Be Fitted in Winter?
- Can You Put a Sedum Roof on a Flat Roof?
- OSB or Plywood for a Flat Roof Deck?
- How Thick Should Flat Roof Insulation Be?
- What Causes Blisters on a Flat Roof?
- Can You Convert a Flat Roof to a Pitched Roof?
- Flat Roof Edge Trims: What Do They Do?
- Does a New Flat Roof Need Planning Permission?
Roof replacement 20
- How Long Does It Take to Replace a Roof?
- What Is the Cheapest Option for a New Roof?
- How Long Does a New Roof Last?
- Can You Stay at Home During a Roof Replacement?
- Do You Get a Certificate After a New Roof?
- Does a New Roof Need Planning Permission?
- Can You Replace a Roof in Winter?
- Can Old Roof Tiles Be Reused?
- What Does Stripping a Roof Involve?
- Does a New Roof Need New Battens?
- Do You Need to Tell Neighbours About a New Roof?
- What Happens if It Rains During a Roof Replacement?
- Can You Change Roof Tiles to Slate?
- Does a New Roof Lower Home Insurance?
- Do You Need a Skip for a Roof Replacement?
- Is a Roof Guarantee Transferable When You Sell?
- Should You Replace Fascias and Gutters With a New Roof?
- Can You Replace Just One Side of a Roof?
- Bats in the Roof: What Happens to a Re-roof?
- How Disruptive Is a Roof Replacement?
Emergency roof repairs 20
- How Do You Emergency Patch a Roof?
- Is Roof Damage an Emergency?
- What Should You Do if Tiles Blow Off in a Storm?
- Is a Leaking Roof Dangerous?
- How Quickly Can an Emergency Roofer Get to You?
- My Rented Home's Roof Is Leaking: Who Fixes It?
- How Can You Stop a Roof Leak From Inside?
- Do Roof Leak Sealants Actually Work?
- What Should You Do About a Bulging Ceiling?
- Roof Leak Near Lights or Electrics: What to Do
- Can Lightning Damage a Roof?
- Does Hail Damage UK Roofs?
- How Long Can a Tarpaulin Stay on a Roof?
- What Wind Speed Damages a Roof?
- Why Does My Roof Only Leak in Heavy Wind?
- What Evidence Does Your Insurer Need After Roof Damage?
- Should You Go on the Roof to Check Damage?
- Can a Roof Leak Cause Mould?
- Do Roofers Work Weekends and Bank Holidays?
- Can an Aerial or Satellite Dish Damage a Roof?
Slate roofing 20
- Can You Walk on a Slate Roof?
- What Is a Slate Tingle?
- How Is a Single Slate Replaced?
- Why Are My Slates Turning White?
- What Is the Minimum Pitch for a Slate Roof?
- How Heavy Is a Slate Roof?
- Slate or Tile: Which Roof Is Better?
- Do Slate Roofs Need Maintenance?
- What Is Head Lap on a Slate Roof?
- Why Do Slates Delaminate?
- What Size Slates Do I Need?
- Are Slate Roofs Fire Resistant?
- Is Slate a Good Roofing Material?
- Does Moss Damage Slate Roofs?
- Can You Mix Old and New Slates on One Roof?
- What Are Slate Vents?
- What Ridge Goes on a Slate Roof?
- How Long Does It Take to Re-slate a Roof?
- What Is a Slate-and-a-Half?
- What Are Mitred Hips on a Slate Roof?
Ridge and verge repairs 20
- Why Do Ridge Tiles Come Loose?
- What Is a Dry Ridge System?
- How Long Does a Dry Ridge System Last?
- How Long Does Ridge Mortar Last?
- Do Dry Verges Rattle in the Wind?
- Do You Need Approval to Fit Dry Verge?
- Can Dry Verge Be Fitted to an Existing Roof?
- Can You Repoint Ridge Tiles Yourself?
- Why Are My Dry Verge Caps Falling Off?
- What Is Verge Undercloak?
- Half-Round, Angled or Hogback: Ridge Tile Types
- Can Old Ridge Tiles Be Reused?
- Does Ridge Work Need Scaffolding?
- A Ridge Tile Fell Off: Is It an Emergency?
- What Is a Roof Verge?
- What Is a Ridge End Cap?
- Can Clay Tile Roofs Have a Dry Ridge?
- Does Home Insurance Cover Loose Ridge Tiles?
- Can a Cracked Ridge Tile Be Repaired?
- Dry Hip or Mortar Hip?
Chimney repairs 20
- How Often Should a Chimney Be Repointed?
- Do You Need Scaffolding for Chimney Repairs?
- Lime or Cement Mortar for Chimney Repointing?
- How Long Does Chimney Repointing Take?
- Is a Cracked Chimney Pot Dangerous?
- Do You Need Planning Permission to Remove a Chimney?
- What Is Chimney Flashing?
- Does Home Insurance Cover Chimney Repairs?
- Can You Remove a Chimney Breast and Keep the Stack?
- How Do You Stop Birds Nesting in a Chimney?
- Why Are My Chimney Bricks Crumbling?
- What Is a Chimney Stack?
- Chimney Sweep or Roofer: Who Fixes What?
- Should You Remove a Chimney You Don't Use?
- Does a Capped Chimney Need Ventilation?
- What Are the White Marks on My Chimney?
- Can a TV Aerial Damage a Chimney?
- Can Chimney Repairs Be Done in Winter?
- How Much Does It Cost to Replace a Chimney Pot?
- Does a Chimney Need Lining?
Lead work 20
- Do Roofers Still Use Lead?
- What Is the Problem With Lead Roofing?
- Why Is Lead Used on Roofs?
- Is Lead Flashing Dangerous to Handle?
- What Is a Lead Valley?
- Why Is New Lead Treated With Patination Oil?
- Can You Repair Lead Flashing With Sealant?
- What Is a Chimney Back Gutter?
- What Is Lead Welding (Lead Burning)?
- How Is Lead Flashing Fixed Into Brickwork?
- Why Does Lead Crack on a Roof?
- What Is a Lead Saddle?
- Does a Lead Roof Need Ventilation Underneath?
- How Are Dormer Cheeks Leaded?
- What Is the White Powder on New Lead?
- Lead Flashing vs Mortar Fillets
- What Happens to Old Lead From a Roof?
- What Is the Maximum Length of a Lead Sheet?
- How Should Lead Flashing Meet an Extension Wall?
- What Is a Lead Slate?
Gutters, fascias and soffits 20
- Should Gutters Match Fascia and Soffit?
- What's the Difference Between a Soffit and a Fascia?
- How Long Do uPVC Fascias Last?
- Why Are My Gutters Overflowing?
- How Do You Fix a Leaking Gutter Joint?
- Do You Need Scaffolding to Replace Fascias?
- Can Fascias Be Replaced Without Disturbing the Roof?
- What Is an Eaves Protection System?
- Are Gutter Guards Worth It?
- How Often Should Gutters Be Cleaned?
- What Size Guttering Do I Need?
- Square, Half-Round or Ogee Guttering?
- Why Are My Gutters Sagging?
- Birds Nesting in Soffits and Fascias: What Can You Do?
- Could My Soffits Contain Asbestos?
- How Do You Unblock a Downpipe?
- Can uPVC Guttering Be Painted or Recoloured?
- Who Is Responsible for Shared Guttering?
- What Are Bargeboards?
- Why Is Water Running Behind My Gutter?
Roof windows 20
- How Much Does a Flat Roof Skylight Cost?
- What Are the Disadvantages of Skylight Windows?
- What Is the Difference Between a Roof Window and a Skylight?
- Can a Roof Window Be Fitted From Inside?
- How Long Does It Take to Fit a Roof Window?
- Can You Put a Roof Window in Any Roof?
- Do Roof Windows Make Rooms Too Hot?
- Can You Replace Just the Glass in a Roof Window?
- What Is the Minimum Pitch for a Roof Window?
- Are Electric Roof Windows Worth It?
- Are Roof Windows Noisy in the Rain?
- Are Roof Windows Secure?
- What Size Roof Window Do I Need?
- Can You Fit a Roof Window in a Slate Roof?
- How Do You Clean a Roof Window?
- Why Won't My Roof Window Close?
- Roof Lantern or Flat Rooflight?
- What Is an Escape Roof Window?
- Can a Roof Window Be Moved or Enlarged?
- How Long Do Roof Windows Last?
Roof inspections 20
- How Often Should a Roof Be Inspected?
- Should a Roofer or a Surveyor Inspect My Roof?
- How Long Does a Roof Inspection Take?
- Can a Roof Be Inspected From the Ground?
- Do Drone Roof Surveys Need Permission?
- Are Free Roof Inspections Worth It?
- Can You Renegotiate a House Price Over Roof Defects?
- How Can You Tell How Old a Roof Is?
- What Is a Roof Survey?
- What Should a Roof Inspection Report Include?
- Is Rain a Good Time to Inspect a Roof?
- Do You Need an Asbestos Survey Before Roof Work?
- Does a Roof Inspection Include the Loft?
- Will a Mortgage Valuation Pick Up Roof Problems?
- Should You Have the Roof Checked Before Solar Panels?
- What Roof Damage Can't Be Seen From Outside?
- Snagging a New-Build Roof
- What Is a Roof Health Check?
- Should You Survey the Roof Before Selling?
- Is It Safe to Inspect Your Own Roof?
Roof cleaning 20
- Moss on Roof Tiles: Is It a Problem?
- How Often Should a Roof Be Cleaned?
- Can Moss Cause a Roof to Leak?
- When Is the Best Time to Remove Roof Moss?
- How Long Before Moss Grows Back?
- Can Roof Cleaning Void a Tile Warranty?
- Do Zinc Strips Stop Roof Moss?
- Why Does Moss Grow on One Side of the Roof?
- Can You Use Bleach on Roof Tiles?
- How Long Does Roof Cleaning Take?
- Will Roof Cleaning Make a Mess of My Garden?
- What Is Soft Washing a Roof?
- Can a Roof Be Cleaned in Winter?
- What Is the Orange Growth on My Roof?
- Does Roof Cleaning Need Scaffolding?
- Are Roof Moss Treatments Safe for Pets?
- Does Cleaning a Roof Add Value?
- How Do You Clean a Flat Roof?
- Can an Asbestos Cement Roof Be Cleaned?
- Is Roof Cleaning a Waste of Money?
Conservatory roofs 20
- How Long Does It Take to Replace a Conservatory Roof?
- Can You Replace Just the Roof of a Conservatory?
- How Long Does a Polycarbonate Conservatory Roof Last?
- Is a Solid Conservatory Roof Worth It?
- Do Conservatory Insulation Panels Cause Condensation?
- Can You Put Tiles Over an Existing Conservatory Roof?
- Is Self-Cleaning Glass Worth It on a Conservatory?
- Why Is My Conservatory Roof So Noisy in the Rain?
- Does a Conservatory Roof Need Vents?
- Can a Solid Conservatory Roof Have Roof Windows?
- Can You Replace Polycarbonate With Glass?
- Does a Solid Roof Turn a Conservatory Into an Extension?
- How Do You Clean a Conservatory Roof Safely?
- Why Is My Conservatory Leaking Where It Meets the House?
- Conservatory Roof Blinds or a New Roof?
- Does a Tiled Roof Make a Conservatory Dark?
- Can a Lean-To Conservatory Have a Tiled Roof?
- Will a Replacement Conservatory Roof Affect Selling My House?
- How Much Does a Tiled Conservatory Roof Weigh?
- Can a Conservatory Roof Be Repaired Rather Than Replaced?
Garage roofs 20
- What Is Asphalt Roll Roofing (Mineral Felt)?
- Is an Asbestos Garage Roof Dangerous?
- Can I Remove an Asbestos Garage Roof Myself?
- Does Asbestos Cement Removal Need a Licence?
- How Do You Test a Garage Roof for Asbestos?
- Can You Paint or Seal an Asbestos Garage Roof?
- How Long Does a Garage Roof Last?
- Do You Need Planning Permission to Replace a Garage Roof?
- Why Is My Garage Roof Leaking?
- Why Is It Dripping Under My Metal Garage Roof?
- Are Corrugated Bitumen Sheets Any Good?
- Can You Use Clear Sheets on a Garage Roof?
- Can a Whole Asbestos Garage Be Demolished?
- Selling a House With an Asbestos Garage Roof
- Should You Insulate a Garage Roof?
- How Long Does Shed Felt Last?
- Is EPDM Good for a Garage Roof?
- Will Insurance Pay to Remove an Asbestos Garage Roof?
- Rotten Garage Roof Joists: Repair or Replace?
- How Long Does It Take to Replace a Garage Roof?
Spray foam insulation 20
- Is Spray Foam Insulation Bad for Your Roof?
- How Long Does Spray Foam Removal Take?
- Does Spray Foam Cause Damp in the Loft?
- Can Spray Foam Rot Roof Timbers?
- Is Spray Foam a Fire Risk?
- Can You Get Equity Release With Spray Foam?
- What Paperwork Should You Have for Spray Foam?
- Can Spray Foam Be Removed From Just Part of a Roof?
- Can Spray Foam Be Applied Over Roof Felt?
- Does Spray Foam Fix Slipped Tiles?
- Spray Foam Cold Calls: How to Spot a Hard Sell
- Is Spray Foam Toxic Once Cured?
- Does Spray Foam Actually Save Energy?
- What Is Spray Foam Insulation?
- Should Spray Foam Go Under a Breathable Membrane?
- How Should You Insulate After Removing Spray Foam?
- Can You Claim on a Spray Foam Guarantee?
- Spray Foam in a Loft Conversion
- Who Should Remove Spray Foam Insulation?
- Is Spray Foam OK in a Garage or Outbuilding?
Commercial roofing 20
- What Is the Difference Between Commercial and Domestic Roofing?
- What Is the Longest-Lasting Commercial Flat Roof?
- What Is the Most Common Commercial Roof Style?
- How Long Does a Commercial Roof Last?
- Can You Overclad an Asbestos Cement Roof?
- What Is a Composite Roof Panel?
- How Do You Find a Leak in a Warehouse Roof?
- What Is Built-Up Felt Roofing?
- What Is Single-Ply Roofing?
- Commercial Leases: Who Repairs the Roof, Landlord or Tenant?
- How Often Should a Commercial Roof Be Inspected?
- Can Roof Work Be Done Without Closing the Business?
- Replacing Rooflights on Industrial Roofs
- What Is a Standing Seam Roof?
- What Is Gutter Lining on a Commercial Roof?
- Can a Commercial Building Have a Green Roof?
- Is My Commercial Roof Strong Enough for Solar Panels?
- What Edge Protection Does a Commercial Roof Need?
- How Long Does a Commercial Re-roof Take?
- What Is Tapered Insulation?
Every answer here starts with the answer. The first lines tell you yes, no or it depends, and on what. The rest of the page explains why, describes what to check on your own roof, and says when the job needs a roofer rather than a ladder and a free afternoon.
Where a question touches on safety, such as working at height, asbestos cement sheets or a ceiling holding water, the answer says plainly when to stop and call someone. Where it touches on Building Regulations or planning, it gives the official position and points you to your council rather than guessing at your circumstances.
If your question is not covered, ask us. Ring 01256 213956 or send a photo on WhatsApp, and we will tell you what we think is going on. For a fuller treatment of a subject, the guides go into more depth, and every answer links to the service it belongs to.
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