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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.

Competent Roofer is a scheme that allows professionals to self-certify that their work is in line with Building Regulations. If you don’t use a registered Competent Roofer, you’ll have to pay your local authority to certify the work, so we recommend you use a Competent Roofer to save yourself extra outlay at the end.

Ponding is where you see pools of water appearing on your flat roof. Unless your roof is leaking or showing other signs of damage, you don’t need to replace it. When you do have your flat roof replaced, tell the contractor so they can find out the cause of the ponding.

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.

Replacement of roof tiles that have fractured, cracked or is missing is vital to avoid roof leaks and ceiling damage once rain and wind appear. Countering the problem swiftly by yourself is probable as long as it's only a few tiles. Charges for tile replacement can be expensive and fluctuate conditional on the company you hire.

The steps to replacing a tile are:

Ensure you have the right replacement tile as there are numerous different roof tiles on the market.

The most common types of roof tiles are concrete and terracotta. You must confirm that the tile is identical to your earlier tile or it may not work and can result in impairment even though you've tried to repair it. If you don't know what the tile is, ask the suggestion of a roofing supplier and they should be able to match it for you.

Get onto the roof.

It is only advisable to do this if the safety is guaranteed, using a steady ladder and maybe even using climbing ropes to protect you in case of a fall. If you don't possess a head for altitudes or you're sceptical about how safe it is for you to get on the roof, call in a professional.

Once you have securely gotten to the cracked tile, you'll want to somewhat lift the tiles that overlay the one to be detached. Do this by means of two pieces of timber to hold them up. Lift the broken tile over the baton with a brick trowel and gently slide it down.

Place your new tile on top of the brick trowel and inverse the steps to remove the tile.

Be certain to place the overlying tiles back into place.

Conduct a fast check across the roof to review any other possible damage. It is always advised to keep update on how the roof is holding out to keep an eye out for other tiles that might need replacing.

The feasibility of this will depend on the roof’s strength, in particular its load bearing capabilities. This is simply because tiles are heavier than the metal sheeting. Normally a tiled roof will need to take a load capacity of 60kg per square metre. You will need a trusted roofing company to advise on this.

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.

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.