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Blisters are most common on membrane roofing systems. Lots of contractors will tell you that if there are no signs of further damage, there might not be any need to repair flat roof blisters. They form when pockets of air or water get trapped between layers of the roof’s membrane or between the membrane and the frame. When the sun is out and it heats the pockets expand and stretch the membrane. If you do want to repair your flat roof blisters, there are a few ways to go about it.

If you have a membrane flat roof, cut away the membrane until you reach a place where the membrane is still stuck tightly to the roof. Reapply as many new membrane layers as you cut away over the blistered area. You might even need to do more. To make sure your patch remains watertight, you’ll need to leave at least 6 inches around the edges of the blister.

If you’ve got a felt roof, you can cut an X shape through the blister. Peel back the triangles that you’ve made and let the timber frame dry for a while (so don’t do this when rain is forecast!). Then, coat the area with lots of bitumen adhesive and leave it to dry until it feels tacky. Then press down the triangles of felt firmly into the adhesive.

After that, you’ll need to add more bitumen adhesive to the cuts you made. If you’ve got any spare roofing felt, cut a square that’s about 100mm bigger than the cuts then lay this over the adhesive. If you’ve not got any felt, it’s cheaper to use a self-adhesive flashing strip. Once you’ve laid the strip or patch over, seal the edges with more bitumen adhesive.

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 To Replace Roof Tiles

If your roof tiles is cracked, missing or damaged in one form or the other, you may want to read up to see if the replacement is something you can do by yourself. The answer is yes, roof tiles replacement can be done as a DIY project especially if you’re an experienced DIYer or confident enough to tackle the project. However, if you lack the confidence needed to take on this task, then we’d strongly recommend you get in touch with a professional roofer who can guarantee the best results for help. In this article, we’ll show you how you can replace your roof tiles with relative ease. Let’s take a look!

✓ As you would have rightly guessed, the first step to replacing your roof tiles is to remove the existing damaged roof tile to create space for the new tile. In the event whereby the roof tile is nailed to down, you will have to pry the nails off before proceeding with the broken tile removal.

✓ Once the damaged tile has been removed, the next step is to replace the roof tile as there’ll now be a gap in the roofing area. Simply position the new tile rightly into the space that was formerly filled by the old damaged tile.

✓ After successfully placing the new tiles in spot of the removed tile, you’ll now have to replace the overlapping tiles to their correct position to secure them. To this with a hammer to lift the overlapping tiles a little bit, so you can pull them back into the appropriate place.

✓ This final step is not a necessary one. However, if you’d like to secure your roof tiles further, you can simply nail it into place with a hammer.

How Much Is A New Flat Roof

What is a home without a roof to keep out the elements? Being the first line of defence against intense sun, rain, wind and more, implies they require enough care and attention to keep them in a top condition. Therefore, whether you need a new flat roof or just to replace some tiles, you’d be interested in knowing how much it would cost you to get a new roof before you start making the necessary plans. Here, we’ll give you an idea on the cost of a new flat roof and how you can estimate yours based on your unique requirements.

The size of your roof as well as the material to be used are the two main determinants of any flat roof project’s cost. For instance, a four bedroom detached home’s slate roof will be more expensive than a felted flat roof for a small or standard garage. Generally, in the UK, the average cost for replacing a flat roof will range between £5000 to £6000. However, if you’re on a tight budget and looking for the cheapest possible option, you’ll get a felt flat roof only on a garage at about £1000 to £1500. Meanwhile if you want to replace the entire slate tiles of a large family home, the cost can jump up to a range of £11000 to £13000.

Other factors that plays a key role in the determination of a new flat roof’s cost includes the location, labour as well as materials. For instance, a new flat roof price is likely to be higher in London and the south east than the other regions of the country. Also, labour may cost you around £150 to £250 per worker on a daily basis.

Tar and gravel flat roofs are popular because the gravel weighs down the surface of the roof so it doesn’t blow away and it also protects it from sun damage. The tar makes the roof watertight, so you won’t get any leaks. However, sometimes problems occur and you’ll get cracks and leaks. So how do you repair a tar and gravel flat roof?

If you notice leaking coming through your flat roof, try to find the source of the leak. Since water can travel easily, it might not be where you think it is. The first place to check is the flashing, then any parts of the roof with gravel missing. Once you’ve found the crack, sweep away any remaining gravel and clean the area.

Apply a primer to the area and allow it to dry. Then, apply a tar and gravel roof patch that you can get from most DIY shops. Patch 2-3 inches around the damaged area, creating layers, and ensuring that there aren’t any air bubbles or gaps. Then you should cover the entire patch with gravel.

Before you try to repair a tar and gravel flat roof yourself, consider how much of the roof needs repairing. Professionals often say that if cracks and faults make up 25% or more of the roof, then you should look to replace it. It might be tempting to try and replace your tar and gravel roof yourself, but it’s best left to the specialists. They will ensure that your new roof is watertight and strong enough to withstand sun damage and storms.

How much a flat roof costs to repair depends on a few factors. Is your flat roof on a garage or an extension? What is the flat roof made from? It’s always best to get a few quotes to compare prices, but we’ll give you a rough idea here. If your flat roof was installed in the 1990s or earlier, it’s likely that you’ll see some leaks or damage soon. Felt flat roofs used to be installed completely flat, which meant that water couldn’t run off. That means that water pools and can create moss and damp. Sun exposure can also damage the felt, causing damage and eventually holes that lead to leaks. If you’re lucky enough to have got away with just needing a flat roof repair, this should set you back an average of £100 per square metre. If your roof is sagging due to the weight of it putting pressure on the timber frame, you might need additional joists – which could cost anywhere between £1,000 and £2,000, depending on how many you need. But if the problem is due to the internal part of the roof system becoming waterlogged, you could be looking at over £5,000. If your roof is severely leaking or the timber joists are rotting, it might be more cost effective to replace your flat roof. If you keep forking out for repairs, it will eventually be cheaper just to replace the whole thing, which could cost around £2,000.

How to repair a flat roof depends on the type of flat roof you have. We’ll talk about how to repair felt, asphalt, fibreglass and EDPM flat roofs yourself. But ultimately if you want the best finish, it’s best to ask a professional to repair your flat roof for you. Repairing a flat roof Whether you’ve got an old pour-and-roll type felt roof or a newer torch-on felt flat roof, you can get cracks, lifting around joints, leaks or dips. As a temporary measure, you can buy a special paint that you paint over cracks. For a more permanent repair, you can add a patch of torched-on felt or add a layer on top. Asphalt flat roof repair As your asphalt flat roof gets older, you may notice blisters, cracks or shrinkage and sagging around flashings. Again, you can use a paint on fix from a tin as a temporary repair, or add heat-applied flashing tape around flashing. For a more permanent fix you can use a liquid system, but many are only available to the trade market. You can also add a patch of torched-on roofing felt over a crack. How to repair a fibreglass (GRP) flat roof Fibreglass flat roofs are usually excellent, but problems can involve leaking flashing and cracks near upstands, trims or board joints. You can add acrylic sealant to cracks or holes for a good DIY repair, but a flashing problem is more difficult to fix. You’ll need to clean and sand the affected area of flashing, then laminate a 600g chopped strand mat into place, cure it and add a topcoat colour to match the roof. That sounds like a job better left to a specialist. EDPM rubber flat roof repair Rubber roofs often suffer from shrinkage when mechanical fixings haven’t been used near upstands, flashing leaks or holes or cuts. If you’ve got a small tear that you want to repair, you can add some lap sealant to the area – but use it sparingly. For a more permanent repair to flashing, buy some self-adhesive flashing that will mould into shape easily. Clean the area you want to repair, add EDPM primer, then stick the patch of flashing on from the centre outwards with a hard roller. You can add lap sealant around the edges if you want more protection from water.