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How To Replace A Flat Roof

Is it high time you replaced your flat roof with a new one? If it’s time, then you probably shouldn’t waste another minute! Flat roofs come with multiple upsides and happens to be a lot more affordable than many other options (especially for starters). Not only do they add to your home’s curb appeal and requires a relatively low labour costs as there are minimal risks involved, but they’re also more accessible for maintenance purposes and aren’t as exposed to damage as a pitched roof. However, we’re not here to discuss the various benefits of installing a flat roof, but rather tell you how to install one. If you lack proper training and experience, we’d recommend you hire a trustworthy professional that can guarantee the best results.

• Wipe the entire roof system clean.

• Detach and replace rotted roof sheathings.

• Detach and replace rotted fascia

• Hire a qualified air conditioning professional to disconnect the existing AC units.

• Introduce new aluminium air conditioning stands and secure against the deck.

• Let you qualified air conditioning professional reconnect the existing AC units.

• Put in place the new air conditioning quick disconnects.

• Attach EPS fanfold insulation in such a way to cover the surface of the entire roof and secure it firmly in place.

• Attach the tie-in roof materials where necessary.

• Attach roofing membrane to cover the entire area of the roofing.

• Attach membrane to the entire roof’s perimeter.

• Attach new perimeter flashings (fascia bar, fascia cap and drip edge), secured on the centre at 6. Make use of a good sealant to secure the fascia bar or fascia cap’s top flange.

• Attach boots on plumbing seal and stacks.

• Identify the existing vent stacks and seal, and put curbs

• Put safety walk pad network from the access point of the roof to the air conditioning units.

• Attach rooftop signs for roof traffic personnel

• Tidy up and clear out the debris

It’s relatively simple to remove a Velux window, whether it’s Velux-branded or is another brand of roof window. Here is a breakdown of the steps you’ll need to take to remove a roof window:

1. Remove the sash (opening part) from the roof window frame. Usually there are screws in the hinges to loosen or a button to press and lift out.
2. Next, remove the tiles or slates from around the window frame along with the flashing.
3. Unscrew all the brackets around the window frame and lift out the frame.

It’s that simple! You can do all of this from inside your home – there's no need to climb on the roof. Removing the glass pane from a Velux window, for example if it has blown, is a more difficult job and should be left to a professional. It involves removing the sash from the roof window frame and then removing the surrounding parts of the sash to lift out the sealed unit. They will then place the new glazed unit into the sash frame before securing all the parts back onto the sash and fitting it back into the roof window frame.

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.

The roof is a particularly important part of the home, providing weather and water protection. Therefore, it’s important to regularly check your guttering system and clean out any debris that could cause blockages.Advice given is to consider having a mesh gutter guard to prevent the build-up of leaves and other debris, especially if you want to harvest rainwater.

A roof is one of the most significant portions of any property and they’re also the single part of a structure most vulnerable to impairment from the elements. If your roof suffers substantial damage over time, maintenances and re-roofing charges can be expensive, time-consuming, and stressful which is why it is imperative to keep your roof in sound structural and aesthetic order.

If a tile has fallen off from the top of your roof – you can expect to pay around £70-£100 to replace it including a different tile fitted in its place. Replacing a hip roof will cost between £4,250 and £7,250, the cost varies if you have a single valley or a double valley on your roof. For a new gable roof, you should expect to pay around £3,250 to £5,250.

What does it cost to replace my roof?

The charge of substituting your roof for a new one will be subject to the age and condition that it’s in, but usually, the cost of a new roof on an average property is around £5,500.

Some of the key factors to keep in mind when calculating the cost of re-roofing your house include:

• size of your roof

• type and size of the materials used

• shape and style of the roof

• If structural changes are required or not

• the roofing company hired

Tiled roof repair costs

If you are trying to prevent water from leaking inside your house for one or two tiles, then you can expect to pay between £100 to £200 to fix them and seal the leaks.

Flat roof repair costs

Minor jobs such as repairing flat roofs as well as sheds and garages or mending blisters can usually cost around £300.

Roofing job Price range

Replacing six ridge tiles £135-£260

Replacing six broken or missing tiles £55-£105

Cleanout of your gutter £35-£80

Replacing one right tile on rooftop £70-£100

The cost of a full re-roofing job can amount to around £3,250 to £7,250 depending on the size of your property.

Hip roof Cost range Length of time

Semi-detached home £4,250-£4,750 3-4 days

Detached home £5,250-£5,750 4-5 days

2 valleys – semi-detached home £5,750-£6,250 5-6 days

2-valleys detached home £6,750-£7,250 6-7 days

Gable roof Cost range Length of time

Standard £3,250-£3,750 2-3 days

2-valley £4,750-£5,250 4-5 days

How Often Do Flat Roofs Need Replacing?

When a flat roof needs to be replaced is determined by a number of factors which includes the roof’s exposure to the weather, the condition and age of the roofing materials as well as the construction of the roof. However, with proper maintenance and regular inspection, they should be used for nothing less than 50 years. There are some commonly used types of flat roofs which includes Felt flat roof as well as a GRP flat roof.

Felt Flat Roof

The lifespan of a felt flat roof also varies depending on the quality and grade of the felt roof incorporated. This can make the roof last within the range of 2 to 20 years. More often than not, felt flat roofs are usually installed in such a way to keep the costs down which implies the grades of felts that are mostly used are the economical ones implying a very short lifespan.

In the event whereby a premium grade of felt is incorporated in constructing a roof by professional contractors, will be guaranteed by the manufacturer to last between 10 to 20 years.

One of the major causes of a short lifespan in felts is leaks which should be regularly inspected and repaired once identified. If not, the roof will gradually deteriorate and become a lot weaker due to the action of the sun. However, when a felt roof starts to leak, it’s usually a sign that’s approaching the end of its lifespan and a replacement should be taken into account.

GRP Flat Roof

The GRP flat roof or fibreglass flat roof usually comes with a manufacturer’s guarantee of 20 years and is expected to have a lifespan of a minimum of an additional 10 years.

Unlike felt roofs, they’re more resistant to leaks. However, they should also be regularly inspected for leaks which are caused mostly as a result of installation error rather than the GRP roofing approaching the end of its useful life. If the GRP roof repair does not totally resolve the leak, you should start considering a replacement.

There is simply not one single answer when it comes to knowing how much would it cost to replace a commercial roof. Replacement costs is a variable which is dependent on several factors.

If you are looking to take a shot at guessing an estimate, you will first need to understand the what is need for the replacement.

YOUR COMMERCIAL ROOF IS AGEING

The first sign of replacement is definitely the age. Generally, roofs come with a warranty of twenty years. Based on your materials, the real lifespan for a commercial roof tends to be around 15 to 25 years. Depending on the maintenance and the materials, lifespan can be prolonged.

YOUR COMMERCIAL ROOF LOOKS TIRED

Compare your commercial property with other buildings in the area. If it looks pale and worn out in comparison, it is high time for replacement.

WATER DAMAGE

A sturdy roof should be able to withstand extreme weather conditions such as heavy rain or high winds. However, if a storm has caused significant damage to your roof, its structural integrity might be compromised. water damage is one of the most indicative signs for a roof replacement.

CRACKS AND HOLES IN ROOFING MATERIALS

Proper upkeep of the roofing materials is required for it to continue protecting your property. If you find any cracks or holes, bent tiles or sheets, replacing them is advisable.

SAGGING COMMERCIAL ROOF

Roof replacement is critical when your roof suffers from sagging or corrosion. Once sagging or corrosion begins, the structure becomes vulnerable to damage.

Keeping all the above factors in mind, replacing your commercial roof can range from anywhere around £10,900 to £44,000 depending on the materials you choose. Materials are available in the market from £35 to around £75 per square meter. If you chose higher or premium quality materials, price can range from £115 to £200 per square meter.

How you install commercial rubber roofing is similar to fitting it on a residential property, except that the area that’s covered is likely to be bigger. With commercial properties, you should always leave any maintenance and repair works to the professionals – whether you own or lease the property, you could invalidate any insurance if you try to install rubber roofing yourself. We’ll outline the steps roofers will take when installing rubber roofing on a commercial property.

Firstly, the installers will remove any existing coverings and clean and dry the surface thoroughly. This is vital in ensuring that the rubber will stick. They will then unwrap the EDPM rubber membrane and leave it to rest until it’s fully expanded. On a warm day this may take around half an hour.

Next, the roofers will work with half a sheet of rubber at a time and adhere it to the roof surface. They may use a water-based adhesive which they will spread onto the roof in sections, then roll the membrane onto the surface before moving onto the next section. If they’re using a bonded adhesive, they will apply it to both the roof and the rubber and leave it to dry until it’s tacky before extending the membrane.

Once the EDPM rubber is rolled out, the installers will brush the surface with a large broom to get rid of bubbles and provide a stronger bond. Then they will work of the edges, applying adhesive to roof and walls edges, sealing corners and creating watertight seals. They’ll also tidy up any excess membrane and seal all the trims.

As long as it’s installed correctly, your commercial rubber roofing should last you decades without any repairs needed. It’s always best to inspect your roof regularly to spot any damage before it becomes a bigger problem.