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Verified ProOver 10 Reviews

NH Roofing Services

13 review(s)
Offers services in KNEBWORTH
Flat roof specialist, other roof work undertaken , from small repairs to full replacements
Verified Pro

Hilson Roofing

0 review(s)
Offers services in KNEBWORTH
Your friends in High Places We cover all aspects of roofing from minor repairs to full design and install We are quali...
Verified ProOver 20 Reviews

CRS Contractors

20 review(s)
Offers services in KNEBWORTH
we Are a family run business with over 30 years experience built on reputation Our services include all types of roofing...
Verified Pro

Coastal Prime

0 review(s)
Offers services in KNEBWORTH
Coastal Prime Ltd provides expert home insulation services across the UK, helping homeowners enhance energy efficiency and...

Recent Roofer Enquiries

09 Dec

Cleaning | Gutters

Knebworth - SG3

Enquiry from: Clive S

Start Date: Immediate

clear bungalow gutter of leaves.

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25 Mar

Cleaning | Roof cleaning

Knebworth - SG3

Enquiry from: James H

Start Date: Immediate

Roof clean to remove moss build up End of terrace house with side access, approx area 33 m2

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07 Dec

Roofing | Pitched | Repair

Knebworth - SG3

Enquiry from: Heidi W

Start Date: Immediate

Quote and diagnosis of leaking concervatory for 22 tovey close london colney ***

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20 Sep

Cleaning | Gutters

Knebworth - SG3

Enquiry from: Trusha H

Start Date: Immediate

Gutter clean and wash. Some cleaning of brickwork near overflow gutters (2 areas).

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24 Feb

Roofing | Flat | Replacement

Knebworth - SG3

Enquiry from: Amanda B

Start Date: Immediate

property type: house, roof type: flat, work description: felt roof repair needed asap on a townhouse and posssibly full roof replacement if needed are you the property owner: owner of the property pr...

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24 Feb

Roofing | Flat | Repair

Knebworth - SG3

Enquiry from: Amanda B

Start Date: Immediate

Property type: House, Roof type: Flat, Work description: town house flat roof. storm damage needs repairing as leaking through into bedrooms from front and side of house

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19 Feb

Roofing | Flat | Repair

Knebworth - SG3

Enquiry from: Amanda B

Start Date: Immediate

Property type: House, Roof type: Flat, Work description: town house flat roof. storm damage needs repairing as leaking through into bedrooms from front and side of house

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19 Feb

Roofing | Pitched | Repair

Knebworth - SG3

Enquiry from: Amanda B

Start Date: Immediate

to repair a flat roof on a town house which has been damaged by storm and is leaking into bedrooms at front of house

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10 Feb

Roofing | Pitched | Repair

Knebworth - SG3

Enquiry from: Terence W

Start Date: Immediate

Trusses for house units Dene Street Dorking Surrey need email address to send engs details and contact

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17 Jan

Roofing | Flat | Repair

Knebworth - SG3

Enquiry from: Billy B

Start Date: Immediate

Customer visited the myroofingquotes.co.uk site and submitted an enquiry. Property type: House, Roof type: Flat, Work description: loose tiles moss remval 3 layer felting work required

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16 Jan

Roofing | Pitched | Repair

Knebworth - SG3

Enquiry from: Mrs M

Start Date: Immediate

A leak in garage roof. State of roof needs checking to see if just a repair is sufficient or new garage roof needed.

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28 Sep

Roofing | Pitched | Replacement (Partial & Full)

Knebworth - SG3

Enquiry from: Ricky S

Start Date: 1 to 3 months

new roof and guttering Homeowner Supplied and fitted Please contact to appoint

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02 Jul

Roofing | Pitched | Repair

Knebworth - SG3

Enquiry from: Karen C

Start Date: Immediate

Please quote for an Apex roof replacement on a garage measuring 19 feet 4 inches by 9 feet 10 inches.

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21 May

Cleaning | Gutters

Knebworth - SG3

Enquiry from: Mrs D

Start Date: Immediate

gutter clearing Are you the property owner: Owner of the property Property Type: Detached How many bedrooms do you have: 3-4 Rooms

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05 May

Roof Windows | Skylights

Knebworth - SG3

Enquiry from: Chris M

Start Date: Immediate

awaiting plans for loft conversion Are you the property owner: Owner of the property Do you require any windows: Dormer Agreed to recieve quotes for selected products: Yes Do you require plumbing ...

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24 Aug

Roofing | Pitched | Repair

Knebworth - SG3

Enquiry from: David G

Start Date: Immediate

Two new build semi-detached cottages. Trusses to be 'room in roof' type for main front ridge, giving as much headroom and storage space as possible, though this won't be living space. I can provide ar...

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28 Feb

Roofing | Flat | Replacement

Knebworth - SG3

Enquiry from: Robert C

Start Date: Immediate

L shaped flat roof repair or replace at approx 20 sqm Are you the property owner: Owner of the property Property Type: Semi detached Location of roof: Extension Height: 1st Floor Property Age: ...

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How much do Roofer services cost?

How much do Roofers cost? Costs for Roofers in 2026 can be very different depending on the kind of work that you want to have actually performed in your residence. It's the question we get asked a great deal "how much do Roofers charge?". It's often very good to have an idea of how much a Roofer are going to likely charge for their assistance. Prices will most likely fluctuate based on the materials and also the tradesman picked. The table shows the kinds of task that Roofers generally do as well as the standard cost series of these tasks. Some projects take longer to complete than others so costs do fluctuate by task.

View our Roofer cost guide View our Roofer advice

The average price
of a Roofer in Knebworth is:

£2,934

Roofer job Roofer cost in 2026
Velux windows in Knebworth £675-£1,035
Tile or slate roofing in Knebworth £5,300-£14,780
Flat roof in Knebworth £1,215-£10,575
Commercial roofing in Knebworth £1,070-£10,550
Flat roof repair in Knebworth £460-£4,740
Gutter cleaning in Knebworth £152-£589
Tile roof repairs in Knebworth £222-£2,855
Chimney sweeping in Knebworth £75-£115
Roof cleaning in Knebworth £695-£1,543
Sun Tunnel in Knebworth £700-£1,000

Related Roofer searches in Knebworth

Roofer FAQs

how much is it to replace a garage roof?

How Much Is It To Replace A Garage Roof?

The size of your garage will be the main determinant of the cost of a new garage roof. However, the present condition of your roof structure as well as the type of roof covering preferred are also huge factors. In the UK, the cost of a garage roof replacement will be within the range of £700 to £3600.

The first step a pro will take is to remove the existing roofing while also making sure that the timber structure is in a good condition. In the event whereby the timber is rotten, it will need to be replaced before the installation of a new roof. If the garage roof sheets needs a replacement, you’ll have to spend about £30 to £50 per each garage roof sheets. Individual plywood sheet has around 2.4m x 1.2m in measurement and whose price should also be included in the final cost.

The above information applies only to standard roofing for garage roofs with flat roofs being made of bitumen felt and asphalt. In recent times, this is no longer the case with several more options available. Today, EPDM and GRP fibreglass have rapidly become very popular amongst several homeowners in the country. It’s also important to note that modern roofing has greatly advanced over the years even though both EPDM garage roofs and GRP fibreglass garage roofs are way better and of more quality when compared to felt and asphalt roofs. And thanks to modern technology, modern garage roofing possesses a longer life expectancy and as result, are a lot costlier than the conventional ones.

For a medium size single garage (2.7m x 5.5m), the cost for a felt roof per square metre is between £40 to £70, while that of a fiberglass roof and an EPDM rubber roof is between £90 to £110 and £70 to £100 respectively.

What is a pitched roof?

A pitched roof is a type of roof that is defined to have a sloping surface that has an angle that is greater than 20 degrees. Pitched roofs offer a more classical appearance. They remain the most communal and effective answer in wet and cold weathers to guarantee all-out protection.

Eaves

In the roof, the lower part of the inclined roof which is prominent outside the external face of the wall. The chief purpose of eaves is to pour the rainwater from the roof straight on the exterior wall. It also provides protection from sunlight. Eaves are sometimes decorated to an architectural beauty.

Gable

The Three-sided higher part of the wall at the end of a ridge roof.

Flashing

A band of impermeable material, typically metal, used to eliminate water from the intersection between a roof covering and another part of the structure. Flashings are provided to stop moisture from inflowing the wall and roof through joints in copings, parapet wall, and other infiltrations through the roof plane.

Hip

The Hip is defined as the exterior angle, which is generally greater than 180 degrees, which is formed at the inclined ridge of the roof slopes.

Ridge

The ridge is defined as the horizontal intersection made by the rising roof surfaces that are inclined in opposite directions.

Purlins

Purlins are the horizontal members which are laid on the principal rafters which help to support the common rafter of a roof. This is usually done when the span is large. Purlins are made from wood or steel. The top surfaces of the purlins intend to be unvarying and plane.

Fascia

This is the wooden board that is fixed to the feet of the common rafter at eaves. The Fascia helps the lowest ends of the roof covering material to rest on it.

Rafter

One of the major structural components of a pitched roof is a rafter. The rafter generally begins for the support of the roof to the ridge or hip. The purlin is supported by equally spaced rafters used side by side.

How to repair a hole in a flat roof?

How to repair a hole in a flat roof depends on what material your flat roof is made from. If you have an asphalt, felt or EDPM rubber roof, the repairs are quite simple, whereas it’s a bit more tricky if you have a fibreglass flat roof. How to repair a hole in an asphalt flat roof If you’ve got a small hole in your asphalt flat roof, you might get away with using a paint-on fix from a tin. It’s best to use this as a temporary measure to tide you over until you can get in touch with a professional. If the hole is on the flashing, you can add heat-applied flashing tape to it, or use a patch of torched-on roofing felt. There are liquid systems you can use, but usually they’re only available to the trade. Repairing a hole in a felt flat roof It's a similar process to asphalt roofing if you want to repair a hole in a felt flat roof. Use a paint-on fix for a temporary solution, but the best way to repair a hole is to use a torched-on piece of roofing felt to cover the hole and make it watertight again. How to fix a hole in an EDPM rubber flat roof If the hole in a rubber flat roof is small, you may be able to get away with applying some lap sealant to the hole. Only use a small amount, as if you go for a more permanent repair later down the line all of this will need to be scraped off. You can also use a malleable piece of self-adhesive flashing – clean the area, add EDPM primer and stick the patch on from the centre outwards. Add sealant to the edges if you want to give it more water protection. How to fix pin holes in a fibreglass flat roof If you find pin holes in your fibreglass roof, it usually means there wasn’t enough resin used at installation. To repair the holes, you’ll need to sand down the entire roof back to the clear resin. Then clean the area with acetone and apply GRP roofing resin – the acetone ensures that the resin sticks. You might need two coats of resin to get rid of all the holes.

What is the Velux Active home kit?

Velux installers offer the Velux Active home kit. This provides an automated system to enhance your indoor living. With its sensor-based ventilation apparatus, the Velux active home kit’s smart sensors repeatedly monitor your home’s temperature, humidity and CO2 levels for its optimum healthy living standards.

Sensor-based ventilation
Velux Active tracks temperature, humidity and CO2-levels, and ventilates to keep your indoor climate nice and healthy.

Automatic heat protection
Velux Active automatically protects your home from excessive heat by closing your Velux Integra blinds, awnings and shutters on hot days.

Set personal preferences
Want to swap your alarm clock for a sunrise or air out while you’re at work? Customise your indoor climate with Velux Active.

Voice-control and smart speaker integration come standard with VELUX ACTIVE with NETATMO, enabling you to draw the shades or open the windows just by asking.

how to clean a fibreglass roof?

How To Clean A Fibreglass Roof?

If you have a dirty fibreglass roof or perhaps you’re just planning to have one installed on a newly constructed house, then you’d probably want to know the best way to have your fibreglass roof cleaned.

Generally, fibreglass roofs are of great quality and happens to be a lot more resistant to moisture, heat, water and even fire when compared to the other alternative flat roofing materials. As a result, they require just a little maintenance but this doesn’t mean they should be totally ignored. Truth be told, cleaning of a fibreglass roof is as easy as it get, however, when it comes to working at height, skill and confidence is paramount to guarantee your safety. If you lack any of these two qualities, then it’s highly recommended that you sought the services of a reliable roof cleaning contractor who can do the work safely and perfectly. If you’re able to clean and maintain your fibreglass roof as you should, you wouldn’t have to think about replacement for about 20 to 30 years.

Cleaning is simple and doesn’t take much time. Now let’s take a look at the process.

✓ Preparation. Hose down the vegetation around the area with water to protect them. Once done, mix a gallon of warm water with one quarter cup trisodium phosphate and 1 quart of bleach. Put this mixture into a garden sprayer and sweep any dirt or debris off the roof with a broom.

✓ Application. Spray the mixture over the fibreglass roof, ensuring that it gets to all the necessary corners where dirt may be hidden. Allow this applied solution to sit for up to 15 minutes to loosen the stubborn stains and dirts on the roof.

✓ Finishing. Spray cold water to wash down all the solutions. If there’s still some dirts, you can repeat the process till the fibreglass roof is entirely clean.

What is a Velux window?

A Velux window is a brand of roof window, but the brand is so popular that people often use the name to describe the entire type of window. They are windows that are installed at the same orientation and ‘in plane’ with the surrounding roof, and they’re usually installed at a minimum of a 15-degree pitch. You can buy roof windows that offer completely frameless internal views for a really clean look in your loft conversion, while some come with built-in shutters.

Velux windows aren’t to be confused with rooflights which usually refers to a glazed unit that’s installed on a flat roof. It might also mean a window that’s been installed on a pitched roof out of plane with the level of the tiling.

People also confuse roof windows with skylights, which normally can’t be opened or closed and are usually smaller than Velux windows. Skylights, therefore, only let daylight into the room whereas roof windows also help with ventilation.

If you’re using your loft as a room in your home rather than simply for storage, you must have a roof window installed. Skylights won’t be enough as they don’t allow for ventilation. It doesn’t have to be a Velux window – it can be any type of roof window. Luckily, they tend to come in standard sizes and they must be CE marked if they’re sold as a roof window, so they should be easy to find.

how to clean algae off roof shingles?

How To Clean Algae Off Roof Shingles

Stains and dirt on asphalt shingles can only make your entire house look shabby which can go a long way to hide away the true value of your building. In some cases, dirts and stains on asphalt roofing shingles are nothing more than a cosmetic issue. However, there are also times in which it goes far beyond this - when the stains are indicators of a problem that if ignored, can result in a serious roof damage and ultimately, roof failure. In most cases, it’s usually hard to distinguish these stains and hence, the more reason why your asphalt roofing shingles should be regularly cleaned and maintained. In this article, we’re going to look at how you can get rid of algae of your roof shingles.

Algae growth on roof usually have either blue, green or black stains. They normally begin with little spots which will develop into streaks overtime. These stains are mostly mistaken for moss or mildew and aren’t harmful to any other thing than the roof shingles. However, the look it gives the entire house is something nobody enjoys.

It should be noted that this is a task that deals with working at height and requires skills and confidence to pull off. If you lack any of these qualities, simply reach out to a professional for help.

✓ Safety first. Put on protective clothing.

✓ Apply a bleach solution with a garden sprayer and let it sit for up to 20 minutes

✓ Rinse the roof thereafter with the stream from the hose (do not use a pressure washer as it can damage the roof shingles)

✓ If there are still algae left after rinsing with water, you can make use of a brush with medium-stiff bristles to gently scrub the stains off. If some stains are still left, simply let the roof dry before repeating the process again.

How much are Velux windows?

Velux windows are a great way to add lots of light to your loft space. Velux is actually the name of a brand of roof window – not to be confused with roof lights, which are usually installed on flat roofs, or skylights, which are normally used to add natural light into a room without being able to open it. Roof windows open like regular windows and are fitted within your roof. But how much are Velux windows? Whether you choose a Velux window or another brand of roof window, they’re not cheap. Since they require special installation, including cutting roof timbers and replacing them to keep the structure strong enough, they take longer to install than a normal double glazed window. It can take up to a day to install a large Velux window, and it could set you back anywhere between £1,600 and £2,000. If you only need a small roof window in an area like a bathroom, you can expect to pay up to £1,300 for it to be fitted. Usually, there won’t be any need for scaffolding or towers because Velux windows are designed to be installed from the inside of your home. However, it’s worth setting aside an additional £500 in your budget in case unexpected problems occur and an installer needs to get on your roof to finish fitting the window. All of these prices are based on a standard roof window without any additional features. If you want to be able to control your windows with an electric switch or remote, this could set you back as much as an additional £400. For extra-low energy glass, you can expect to pay up to £200 more.

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